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Tom_Barb's avatar
Tom_Barb
Explorer
Apr 26, 2021

Short in the ACC pole

Our motorhome 2002 Newmar Mountain Aire, 8.3 cummins has a short in the Accessory side of the ignition circuit.
When you replace the fuse, and turn the key to ON- or - Acc, the fuse blows.

The ignition switch has been replaced. ---- same results
all circuits for the Accessories have been disconnected. --- still blows the fuse
Connecting the fuse to the ACC pole of Ignition switch and the fuse (+) show continuity.

The Cummins computer tool will not turn on, it requires the ignition to be turned on, which blows the fuse.
All the relays In the coach have been tested all fuses and been checked.

due to the dead engine the air is depleted "0" so the breaks are locked.
  • Flute Man wrote:
    It will probably take a skilled electrical person with the meter to find it. I can maybe help you over the phone and give you some troubleshooting hints. I am a skilled professional electrical troubleshooter.


    I have been using a tone generator and have traced the wires into a 2.5 inch conduit leading into the frame, then the generator looses it.
  • It will probably take a skilled electrical person with the meter to find it. I can maybe help you over the phone and give you some troubleshooting hints. I am a skilled professional electrical troubleshooter.