Inspection
1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
(a) Inspect the light control switch. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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(b) Inspect the headlight dimmer switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
11 (HU) - 12 (EL) |
Headlight dimmer switch flash |
Below 1 Ω |
17 (HF) - 12 (EL) |
||
11 (HU) - 12 (EL) |
Headlight dimmer switch hi beam |
Below 1 Ω |
HINT:
Perform the flash and high beam inspection with the light control switch set to head.
(c) Inspect the turn signal switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
13 (TR) - 12 (EL) |
Turn signal switch right turn |
Below 1 Ω |
13 (TR) - 12 (EL) |
Turn signal switch right lane change |
Below 1 Ω |
13 (TR) - 12 (EL) |
Turn signal switch neutral |
10 kΩ or higher |
15 (TL) - 12 (EL) |
||
15 (TL) - 12 (EL) |
Turn signal switch left lane change |
Below 1 Ω |
15 (TL) - 12 (EL) |
Turn signal switch left turn |
Below 1 Ω |
(d) Inspect the fog light switch.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
4 (BFG) - 3 (LFG) |
Fog light switch off |
10 kΩ or higher |
4 (BFG) - 3 (LFG) |
Front fog light switch on |
Below 1 Ω |
If the result is not as specified, replace the headlight dimmer switch.
Text in Illustration*a |
Component without harness connected (Headlight Dimmer Switch Assembly) |
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.