AC–55 AIR CONDITIONING SYSTEM – TROUBLESHOOTING 2 Check continuity between terminal GND of A/C amplifier and body ground. LOCK Conncect GND BE3842 N08812 C Measure resistance between terminal GND of A/C amplifier and body ground. OK Resistance: O (continuity) OK NG Repair or replace harness or connector. 3 Check HTR fuse. HTR Fuse J/B No.1 N08021 P Remove HTR fuse from J/B No. 1. C Check continuity of HTR fuse. OK Continuity OK NG Check for short in all the harness and components to the HTR fuse (See attached wiring diagram). Check and repair harness and connector between A/C amplifier and battery.