AC–54 AIR CONDITIONING SYSTEM – TROUBLESHOOTING IG Power Source Circuit CIRCUIT DESCRIPTION This is the power source for the A/C amplifier and servo motors, etc. WIRING DIAGRAM J/B No.1 4 1J W 7 4 B-Y J/B No.1 5 1J HTR 2 1K R-L A/C Amplifier 4 1B R/B No.2 W 2 AM1 2 10 IF1 R/B No.2 B 1 2A ALT 2 R-L 8 A14 IG + W J1 A A 9 A14 GND Battery Junction Connector N13034 INSPECTION PROCEDURE Check voltage between terminals IG and GND of A/C amplifier connector. ON Connect IG GND BE3840 N08811 P Remove the A/C amplifier with connector still connected C 1. Turn ignition switch ON. 2. Measure voltage between terminals IG and GND of A/C amplifier. OK Voltage: Battery positive voltage NG OK Proceed to next circuit inspection shown on matrix chart (See page AC–26). Go to step .