Main Power Supply and Ground Circuit Check

Power Supply Circuit Check
Check power supply circuit for air conditioner system. Refer to "Wiring Diagram - POWER

DIAGNOSTIC PROCEDURE




SYMPTOM:
- A/C system does not come on.




Auto Amp. Check
Check power supply circuit for auto amp. with ignition switch ON. Measure voltage across terminal Nos, 26, 27, 33 and body ground.







Check body ground circuit for auto amp. with ignition switch OFF. Check for continuity between terminal Nos. 32, 14 and body ground.

If OK, check auto amp. ground circuit, see below.
If NG, repair or replace harness. Check 7.5 A fuse (No.5), 10 A fuse (No.8) (located in the fuse block) and 15 A fuses (Nos. 1 and 2, located in the fuse block).
- If fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
- If fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as necessary.

NOTE: If OK, replace auto amp.