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


No. 2 Auxiliary Relay - Troubleshoot

Usage:

45 3BK



Illustration 1g00567107

Schematic Of The Number 2 Auxiliary Relay

If there is no power to one or more of the following items; Wipers and/or Climate Control do the following.

  1. Check the following fuses for continuity; Main Accessory fuse (MF6) and Key Start fuse (F26). Is any 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.

  1. Check wiring for continuity per schematic. Is there continuity?

    • YES, check Key Start switch and Aux #2 relay 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.

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