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Bad accessory switch?

Flatlander

Member
236
3
18
Location
Lubbock, Texas
Hmmmm....my deuce won't start, batteries are good, 24 volts at the starter, when I turn the accessory switch on, I don't hear the fuel pump running and no lights or any dash lights or air alarm.

These switches ever go bad? I haven't pulled it yet to check it. Anything I could be missing before I get into the dash?

Thanks, guys!
 

ida34

Well-known member
4,120
33
48
Location
Dexter, MI
Check behind the engine on the firewall. There is a spot that cuts into the harness if not protected. My truck had it cut and ground out. When it shorted to ground it burned apart. Some GL just twisted the wires together and put tape on it. Needless to say it rubbed through and grounded again. I was on the road when I lost all electrical power like you describe. The wire in question provides power to the switch if I remember right. I had to splice in some new wire then I put some flexible auto wire conduit around it to protect it. This may be your problem.
 

FSBruva

New member
629
1
0
Location
Marietta, GA
The newest -20 manual also has a great flowchart thingy that step by step outlines what to test, how to test it, and what conclusions you can draw. It is ESPECIALLY helpful with diagnosing troublesome electrical issues. It helped me figure out that my batteries were dying because my alternator's diode plates were burned up. A must-have, in my book.

Matt
 
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