B10 Electrical problem????

[fuzz-box]

I have rebuilt a B10 from the frame up and have run into a perplexing problem. I have a new voltage regulator, starter button, and battery along with new wiring. I followed the Tech manual on my wiring diagram for a B10 so everything seems to be in the right place. My problem is as soon as I touch my ground wire to the battery the starter starts cranking the motor without me pushing the starter button in. I have tried a new starter button but the problem is the same. I double and triple checked the wiring and I cannot locate the problem. Does anyone have an idea on what I should look for next? Thanks for any help.

[goatfarmer]

To me,it sounds like the starter solenoid is sticking.Sometimes tapping it with the handle of a screwdriver will unstick it.

[thedaddycat]

I think that the B-10 used a direct connection from the battery through the starter switch to the S/G.... Are you sure that the small wire on the S/G terminal that the starter switch lead goes to(armature) isn't connected to a hot terminal on the regulator? There are only two terminals on the S/G and you must be making the circuit when you connect the ground lead to the battery. That tells me that somehow power is getting to the S/G. Try disconnecting the leads from the S/G and hooking up the battery negative. Then take a meter or test light and see if there's juice on the wires. If so, trace the wire back to the first connection back from the S/G and see what it is. Make sure that when you disconnect the leads that they are NOT resting on something that is grounded or you may get arcing and sparkingwhen you hook up the battery....

[Al]

HI, I would suspect the cutoff contacts of the voltage regulator are fused (welded) together. Disconnect the wire from the A terminal of the regulator and see if the problem doesn't leave. Take a look at our website. edensltd.com and look at the tech articles concerning how starter generators and voltage regulators work. Al Eden