Ford Escape Quiz
Electrical

Diagnosis and Testing - Trailer Lamps

In this manual: Electrical
General Information — 26Chassis — 160Powertrain — 323Electrical — 356Body and Paint — 290
~20min read

Diagnostic Trouble Code (DTC) Chart

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Module Trouble Code Description Action
TRM B10A1:78 Trailer Tow Detection: Incorrect Alignment or Adjustment GO to Pinpoint Test B
TRM B1449:11 Trailer Park/Tail Lamp Output: Short to Ground GO to Pinpoint Test C
TRM B1449:12 Trailer Park/Tail Lamp Output: Short to Battery GO to Pinpoint Test C
TRM B1D08:11 Trailer Left Turn Lamp: Short to Ground GO to Pinpoint Test B
TRM B1D08:12 Trailer Left Turn Indicator: Short to Battery GO to Pinpoint Test B
TRM B1D09:11 Trailer Right Turn Indicator: Short to Ground GO to Pinpoint Test B
TRM B1D09:12 Trailer Right Turn Indicator: Short to Battery GO to Pinpoint Test B
TRM U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test D
TRM U0422:68 Invalid data received from the body control module: event information GO to Pinpoint Test E
TRM U1000:00 Solid State Driver Protection Active - Driver Disabled: No Sub Type Information GO to Pinpoint Test B
TRM U1000:00 Solid State Driver Protection Active - Driver Disabled: No Sub Type Information GO to Pinpoint Test G
TRM U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test F
TRM U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test B
TRM U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test G

Global Customer Symptom Codes (GCSC) Table

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Lighting/Glass/Vision > Exterior Lighting > Trailer > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Trailer > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Trailer > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Trailer > Stays On GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Trailer > Stays On GO to Pinpoint Test C

Symptom Charts

Symptom Chart: Trailer Lamps

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Action
Module Does Not Respond to Diagnostic Scan Tool
REFER TO: Communication Network (418-00 Communication Network, Diagnosis and Testing).
All Trailer Lamps Inoperative GO to Pinpoint Test A
Trailer Stop/Turn Lamp Inoperative or Stays On GO to Pinpoint Test B
Trailer Parking Lamps Inoperative or Stay On GO to Pinpoint Test C

Pinpoint Tests


DIAGNOSTIC PINPOINT TEST A: ALL TRAILER LAMPS INOPERATIVE

For wiring diagrams and connector information, refer to Section 95 Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

Possible Sources

  • Fuse
  • Wiring, Terminals or Connectors
  • TRM

Visual Inspection and Pre-checks

  • Make sure that fuse BJB 91 (40A) is in good condition.
A1 CHECK THE TRM (TRAILER MODULE) VOLTAGE
  • Ignition OFF.
  • Disconnect TRM C425A.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C425A-1 Ground

Is the voltage greater than 11 volts?
Yes GO to A2
No CHECK fuse BJB 91 (40A). If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams Cell for possible causes of the short circuit.
A2 CHECK THE TRM (TRAILER MODULE) GROUND
  • Ignition OFF.
  • Disconnect TRM C425B.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C425A-1 C425B-1

Is the voltage greater than 11 volts?
Yes GO to A3
No REPAIR the circuit.
A3 CHECK THE TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect all TRM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the TRM connectors. Make sure that they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC PINPOINT TEST B: TRAILER TURN/STOPLAMP INOPERATIVE OR ALWAYS ON

For wiring diagrams and connector information, refer to Section 95 Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM B10A1:78 Trailer Tow Detection: Incorrect Alignment or Adjustment On-demand DTC that sets when the TRM detects no trailer connected to the left trailer turn/stop lamp output circuit.
TRM B1D08:11 Trailer Left Turn Lamp: Short to Ground Continuous memory and on-demand DTC that sets when the TRM detects a short to ground in the left trailer stop/turn lamp output circuit.
TRM B1D08:12 Trailer Left Turn Indicator: Short to Battery Continuous memory and on-demand DTC that sets when the TRM detects a short to voltage in the left trailer stop/turn lamp output circuit.
TRM B1D09:11 Trailer Right Turn Indicator: Short to Ground Continuous memory and on-demand DTC that sets when the TRM detects a short to ground in the right trailer stop/turn lamp output circuit.
TRM B1D09:12 Trailer Right Turn Indicator: Short to Battery Continuous memory and on-demand DTC that sets when the TRM detects a short to voltage in the right trailer stop/turn lamp output circuit.
TRM U1000:00 Solid State Driver Protection Active - Driver Disabled: No Sub Type Information Continuous DTC that sets when the TRM has temporarily disabled the output driver. The module has temporarily disabled the trailer stop/turn lamp output because of excessive current draw (for example, a short to ground). The TRM cannot turn on the trailer stop/turn lamp output until the cause of the short circuit is corrected, the DTCs are cleared, and a successful self-test is completed.
TRM U3000:49 Control Module: Internal Electronic Failure Continuous DTC that sets when the TRM has permanently disabled the output driver. The module has permanently disabled the trailer stop/turn lamp output because the excessive current draw fault (for example, a short to ground) exceeded the limits the TRM can withstand. The cause of the excessive current draw MUST be corrected before installing a new TRM.

Possible Sources

  • Wiring, Terminals or Connectors
  • Trailer Concern
  • TRM
B1 CHECK THE TRM (TRAILER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition OFF.
  • Disconnect the trailer, if connected.
  • Disconnect the trailer connector C439.
  • The ignition is on.
  • Using the diagnostic scan tool, perform the TRM self-test.

Are there any TRM diagnostic trouble codes (DTCs) present?
Yes For DTC B1D08:11 or B1D09:11, GO to B2.
For DTC B1D08:12 or B1D09:12, GO to B3.
For DTC B10A1:78, this DTC sets when no trailer is connected to the left trailer turn/stop lamp output circuit. IGNORE this DTC and continue the diagnosis.
For DTC U1000:00, CLEAR the DTCs and REPEAT the self-test (required to enable the trailer stop/turn lamp output driver) if DTC U1000:00 is still present. CHECK the system for normal operation.
For DTC U3000:49, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation). For information on all other DTCs, REFER to the TRM DTC Chart in this section.
No If sent to this test because of a TRM DTC, the vehicle is operating correctly. SEND the trailer to an authorized RV/trailer repair facility.
If not sent to this test because of a TRM DTC, GO to B4.
B2 CHECK FOR A SHORT TO GROUND IN THE TRAILER CONNECTOR
  • Ignition OFF.
  • Disconnect TRM C425C.
  • Action:
    Click to display the connectors

    Left Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-2 Ground

    Click to display the connectors

    Right Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-1 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to B6
No REPAIR the circuit. After the repair:
If no DTCs are present, CHECK the system for normal operation.
If any TRM DTCs other than DTC U3000:49 are present, CLEAR the DTCs, REPEAT the self-test (required to enable the lamp output driver), and turn the ignition off and back on. CHECK the system for normal operation.
If DTC U3000:49 is present, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
B3 CHECK FOR A SHORT TO VOLTAGE IN THE TRAILER CONNECTOR
  • Ignition OFF.
  • Disconnect TRM C425C.
  • The ignition is on.
  • Action:
    Click to display the connectors

    Left Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-2 Ground

    Click to display the connectors

    Right Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-1 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to B6
B4 CHECK THE TRM (TRAILER MODULE) STOP LAMP OUTPUTS
  • With the brake pedal depressed, measure:
    Click to display connectors

    Left Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-2 Ground

    Click to display the connectors

    Right Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-1 Ground

Is the voltage greater than 11 volts?
Yes The vehicle is operating correctly. SEND the trailer to an authorized RV/trailer repair facility.
No GO to B5
B5 CHECK FOR AN OPEN IN THE TRAILER TOW CONNECTOR
  • Ignition OFF.
  • Disconnect TRM C425C.
  • Disconnect:
  • Action:
    Click to display the connectors

    Left Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-2 C425C-1

    Click to display the connectors

    Right Stop/Turn


    Positive lead Measurement/Action Negative lead
    C439-1 C425C-2

Is the resistance less than 3 ohms?
Yes GO to B6
No REPAIR the circuit.
B6 CHECK THE TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect all TRM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the TRM connectors. Make sure that they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC PINPOINT TEST C: TRAILER PARK LAMPS INOPERATIVE OR ALWAYS ON

For wiring diagrams and connector information, refer to Section 95 Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM B1449:11 Trailer Park/Tail Lamp Output: Short to Ground Continuous memory and on-demand DTC that is set when the TRM detects a short to ground in the trailer parking lamp output circuit.
TRM B1449:12 Trailer Park/Tail Lamp Output: Short to Battery Continuous memory and on-demand DTC that is set when the TRM detects a short to voltage in the trailer parking lamp output circuit.

Possible Sources

  • Wiring, Terminals or Connectors
  • Trailer Concern
  • TRM
C1 CHECK TRM (TRAILER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition OFF.
  • Disconnect the trailer, if connected.
  • Disconnect the trailer connector C439.
  • The ignition is on.
  • Using the diagnostic scan tool, perform the TRM self-test.

Are there any TRM diagnostic trouble codes (DTCs) present?
Yes For DTC B1449:11 GO to C2
For DTC B1449:12 GO to C3
For DTC U1000:00, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the trailer parking lamp output driver if DTC U1000:00 is present). CHECK the system for normal operation.
For DTC U3000:49 INSTALL a new TRM.
REFER TO: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation). For information on all other Diagnostic Trouble Codes (DTCs), REFER TO the TRM DTC Chart in this section.
No If sent to this test because of a TRM DTC, the vehicle is operating correctly. SEND the trailer to an authorized RV/trailer repair facility.
If not sent to this test because of a TRM DTC, GO to C4.
C2 CHECK THE TRAILER CONNECTOR FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect TRM C425C.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C439-3 Ground

Is the resistance greater than 10000 Ohms?
Yes GO to C6
No REPAIR the circuit. After the repair:
If no DTCs are present, CHECK the system for normal operation.
If any TRM DTCs other than DTC U3000:49 are present, CLEAR the DTCs, REPEAT the self-test (required to enable the lamp output driver), and turn the ignition off and back on. CHECK the system for normal operation.
If DTC U3000:49 is present, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
C3 CHECK THE TRAILER CONNECTOR FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect TRM C425C.
  • The ignition is on.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C439-3 Ground

Is there voltage present?
Yes REPAIR the circuit.
No GO to C6
C4 CHECK TRM (TRAILER MODULE) PARKING LAMP OUTPUTS
  • Set the headlamp switch to the PARKING LAMPS ON position.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C439-3 Ground

Is the voltage greater than 11 volts?
Yes The vehicle is operating correctly. SEND the trailer to an authorized RV/trailer repair facility.
No GO to C5
C5 CHECK THE TRAILER TOW CONNECTOR FOR AN OPEN
  • Ignition OFF.
  • Disconnect TRM C425C.
  • Action:
    Click to display the connectors
    Positive lead Measurement/Action Negative lead
    C439-3 C425C-3

Is the resistance less than 3 ohms?
Yes GO to C6
No REPAIR the circuit.
C6 CHECK TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect all TRM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the TRM connectors. Make sure that they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
PINPOINT TEST D: U0140:00

For wiring diagrams and connector information, refer to Section 95 Wiring Diagrams.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM U0140:00 Lost Communication With Body Control Module: No Sub Type Information Continuous memory DTC that is set when the TRM does not receive messages from the BCM.

Possible Sources

  • Communication Problem
  • BCM
  • TRM
  • BCM concern
D1 VERIFY CUSTOMER CONCERN
  • The ignition is on.
  • Make sure the observed symptom is present.

Is the observed symptom present?
Yes GO to D2
No The system is currently operating normally. The DTC may have been set due to high network traffic or an intermittent fault. CLEAR the DTC.
D2 CHECK THE COMMUNICATION NETWORK
  • Using a scan tool, perform the network test.

Does the TRM pass the network test?
Yes GO to D3
No CHECK that the TRM is communicating with the diagnostic scanner.
REFER TO: Communication Network (418-00 Module Communications Network, Diagnosis and Testing).
D3 RETRIEVE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a scan tool, perform the BCM self-test.

Are any BCM Diagnostic Trouble Codes (DTCs) recorded?
Yes
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to D4
D4 RECHECK TRM (TRAILER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scanner, clear the TRM Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Ignition OFF.
  • The ignition is on.
  • Using the diagnostic scan tool, perform the TRM self-test.

Is DTC U0140:00 still present?
Yes GO to D5
No The system is currently operating correctly. The DTC may have been set due to high network traffic or an intermittent fault.
D5 CHECK FOR DTC U0140 SET IN OTHER MODULES
  • Using the diagnostic scan tool, clear all Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • The ignition is on.
  • Using the diagnostic scan tool, perform a self-test.
  • Retrieve the Diagnostic Trouble Codes (DTCs) from all modules.

Is DTC U0140 set in any other module?
Yes GO to D6
No GO to D7
D6 CHECK BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the BCM connectors. Make sure they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this condition, STOP this test and FOLLOW the service article instructions. If no service article resolves this condition, INSTALL a new BCM.
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
D7 CHECK TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect all TRM connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Connect the TRM connectors. Make sure that they are fully seated and locked.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, STOP this test and FOLLOW the TSB instructions. If no TSB applies to this concern, INSTALL a new TRM.
REFER to: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC PINPOINT TEST E: U0422:68

For circuit and connector information, refer to Wiring Diagrams Cell 92.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM U0422:68 Invalid data received from the body control module: event information Continuous memory and on-demand DTC that is set when the TRM receives invalid network data from the BCM.

Possible Sources

  • HS-CAN
E1 REPEAT THE ON-DEMAND SELF-TEST AND CHECK DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scanner, repeat the BCM self-test.

Are there any non-network diagnostic trouble codes (DTCs)?
Yes RESOLVE the BCM Diagnostic Trouble Codes (DTCs).
REFER TO: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No Diagnose all communication network diagnostic trouble codes (DTC).
REFER to: Communication Network (418-00 Communication Network, Diagnosis and Testing).
DIAGNOSTIC PINPOINT TEST F: U2100:00

For circuit and connector information, refer to Wiring Diagrams Cell 92.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM U2100:00 Initial Configuration Not Complete: No Sub Type Information Continuous memory and on-demand DTC that is set due to an incomplete or incorrect TRM configuration.

Possible Sources

  • TRM
F1 CHECK VEHICLE HISTORY
  • Check the vehicle history for any recent TRM service actions.

Has any recent TRM service been performed?
Yes PERFORM the PMI procedure as directed by the diagnostic scan tool.
REFER TO: Module Programming (418-01 Module Configuration, General Procedures).
No GO to F2
F2 CHECK TRM (TRAILER MODULE) OPERATION
  • Disconnect and inspect the TRM and the associated inline connectors.
  • Repair:
    • corrosion (install new connector or terminals - clean module pins)
    • damaged or bent pins - install new terminals/pins
    • backed-out pins - install new pins as necessary
  • Reconnect the TRM and the associated inline connectors. Make sure that it is properly installed and latched.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new TRM.
REFER TO: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly. The concern may have been caused by module connections. ADDRESS the root cause of any connector or terminal issues.
DIAGNOSTIC PINPOINT TEST G: U1000:00, U3000:49

For circuit and connector information, refer to Wiring Diagrams Cell 92.

Normal Operation and Fault Symptoms

REFER TO: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER TO: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

Trouble Code Description Fault Trigger Condition
TRM U1000:00 Solid State Driver Protection Active - Driver Disabled: No Sub Type Information Continuous memory and on-demand DTC that is set when the module temporarily disabled the output because of excessive current draw (for example, a short to ground). The TRM cannot turn on the output until the cause of the short is repaired. First, REFER TO all other Diagnostic Trouble Codes (DTCs). After the cause is repaired, CLEAR the Diagnostic Trouble Codes (DTCs). REPEAT the self-test.
TRM U3000:49 Control Module: Internal Electronic Failure Continuous memory and on-demand DTC that is set when the module permanently disabled the output because a fault of excessive current draw (for example, a short to ground) exceeded the limits the TRM can withstand. The cause of the excessive current draw MUST be repaired before a new TRM is installed. First, REFER TO all other Diagnostic Trouble Codes (DTCs). After the cause is repaired, INSTALL a new TRM.

Possible Sources

  • HS-CAN
G1 REPEAT THE ON-DEMAND SELF-TEST AND CHECK TRM (TRAILER MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using the diagnostic scanner, clear the Diagnostic Trouble Codes (DTCs) and repeat the TRM self-test.

Does TRM DTC U1000:00 or U3000:49 return?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, STOP this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new TRM.
REFER TO: Trailer Module (TRM) (417-01 Exterior Lighting, Removal and Installation).
No The system is currently operating correctly.

Test yourself

A quick Ford Escape quiz: every answer comes with an explanation and a link to the manual page.