T-340 Electrical Problem

Paul Wald

Member
I have a t-340 gas crawler. Someone (let's pretend it was my wife)left the ignition switch on overnight. With a new battery, the AMP light doesn't even come on dash when I turn the ignition on now. Took off distributor cap and moved points open and closed, can't see spark. Does that sound like the coil, a relay somewhere, something else?
Salt Creek Life
 
Lets assume the battery is New, and charged.
Use a volt meter to check if there is voltage at the posts of the battery (not the wire terminals, the actual posts on the battery)
if volts, now check volts from Pos terminal to negative cable end. If no volts, the negative cable end (at the battery) is not clean enough to conduct electricity from the post.
If volts, check from the Neg post to the positive cable end. If no volts the pos cable end is corroded.
With voltage in the wires leading from the battery, we now check by using a different method. Turn the lights on. (Assumes no lights come on)
At the ground strap to frame/engine, test voltage from wire end to chassis. (tests the ground) If voltage is found clean that terminal.
(no volts should be found)
Now test from ground to the connector at the solenoid where the other battery lead is connected. Voltage Good no voltage, bad wire.
Now there should be a second wire connectred to that post. Make sure it has power, if not clean the stud and terminals on it.
Follow that wire making sure there is voltage at each connection. Use the diagram, and follow the power to the key, lights , and charging system. You will find it. Jim
 
Thanks Jim. I did find it. No lights to turn on, no key either. Just a push/pull switch for ignition. Only had power to one side no matter the position. Jumpered it and TADA dash light came on. Of course it has the shortest wires in the hardest spot to reach, but pretty cheap to replace. May put a keyed switch in, I am betting it had one from the factory.
Thanks for the help. I put a link below if ya wanna see the little dozer.
T 340 with story
 

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