Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Electronic Systems Caterpillar

Illustration 1	g00567196
Schematic Of The Accessory Relay

If there is no power to any or all of the following items; Accessory Socket, Movable Console, Seat Height Switch or Radio do the following.

1. Check the following fuses for continuity; Main Power #2 (MF7) if no power to all accessories, Accessory Socket fuse (F1), Movable Console fuse (F15), Seat Height Switch fuse (F16) or Radio fuse (F17). Is a fuse open circuit?
   • YES, replace fuse, operate machine, and check fault codes. If machine operates and no fault codes are present, the repair is complete. If new fuse fails check for short circuit.

   • NO, go to Step 2.

2. Check wiring for continuity per schematic. Is there continuity?
   • YES, check Key Start switch and Accessory relay (R9) for proper operation. Replace component if failed. Operate machine and if no fault codes are present, the repair is complete.

   • NO, repair or replace open wiring. Operate machine, and check fault codes. If machine operates and no fault codes are present, the repair is complete.