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Electrical Trouble

J

JimWalsh

New User
Good Morning. Hoping I can get some help. I pulled a real dumb one yesterday morning, in my morning stupor. I boosted my TEA20 with a
battery pack, like I almost always do, because the battery is weak. But, you guessed it, I reversed the polarity. Now I have to cross the
solenoid to get it to turn over, but it won't fire. Does anyone have any idea which components, aside from the solenoid, I may have ruined?
Everything I've read since tells me there is no fuse to protect the circuit from dummies. Hopefully it's the coil, but I'm naturally concerned it
may be more. There is good voltage to the starter button, good voltage to the solenoid when the starter button is depressed. Of course, we're
heading straight to winter. Couldn't happen in the spring! Any help greatly appreciated! Thanks, Jim Walsh
 
If the tractor is original, reversing the polarity would have no effect on the tractor. Might damage the battery or the battery pack/vehicle doing the jumping, but not the tractor.

BUT, if there have been changes, like an alternator added, or electronic ignition, that's another story!

If it has an alternator, when the polarity was reversed it would have caused a short to ground on the large output wire from the alternator. That could have burned out the amp gauge, which would kill all power to everything. Look for other damage related to where the alternator wire connects to the battery. Could have also damaged the alternator (if equipped).

If it has electronic ignition, the module is fried.

Reversing the polarity would not damage a solenoid, or point type ignition.
 
Thanks. I suspected the coil and points, but both coil and condenser test okay, and and the points work. Can't hear the solenoid do anything when applying power, yet there is voltage to it. It has a push button on the dash, so I'm not sure if that means everything has been updated or not. Is there anything in the ignition switch I could have fried? When I boost it at the battery, the red power light comes on. Thanks again - Jim
 
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