Stereo Component Amplifier Power Source Circuit
This circuit provides power to the stereo component amplifier assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURECHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE)
(a) Disconnect the stereo component amplifier assembly connectors. |
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(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
|---|---|---|
S24-6 (GND) - Body ground |
Always |
Below 1 Ω |
S24-7 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Switch Condition | Specified Condition |
|---|---|---|
S31-1 (+B) - S24-6 (GND) |
Always |
11 to 14 V |
S31-5 (+B2) - S24-6 (GND) |
Always |
11 to 14 V |
S23-12 (ACC) - S24-6 (GND) |
Ignition switch ACC |
11 to 14 V |
*a |
Front view of wire harness connector (to Stereo Component Amplifier Assembly) |
| OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | ![]() |
REPAIR OR REPLACE HARNESS AND CONNECTOR |
Test yourself
A quick Toyota Tacoma quiz: every answer comes with an explanation and a link to the manual page.

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