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Old 09-30-2009, 11:11 AM
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Testing Starter Solenoid

I have a starter solenoid for a 1980s John Deere 108 I'm fixing... not sure if it's the key switch, solenoid, or what. I hooked battery straight to starter and it cranks, not sure if there's spark or not. (is there a foot safety switch on these?)

Anyway, how do you test the solenoid? (2 large posts, for + battery cable and starter cable hookups, and one small connector (key switch + ? Is the 'mounting plate' the ground?) I didn't hear a 'click' when I turned the key. The key switch and solenoid are below the battery, and it's a really tight fit as the 'heavy duty' battery is really about 1/2 inch too tall to fit in there smoothly (I have to pull back on the dash a little and squeeze it in, it takes about 5 minutes haha) so I'd rather not deal with putting the battery in and out again to see what works and what doesn't.
Thanks,
matt
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Old 09-30-2009, 02:15 PM
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Testing Starter Solenoid

jumper wire on the small lug from switch to battery side hook up .
no click or turn over , check that solenoid has good ground .
heavy jumper cables made from welding leads , you can put the battery somewhere else and try .
good luck breaking ground
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Old 09-30-2009, 03:00 PM
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I'll give that a shot after work tonight! I gotta go to work, thanks
-Matt
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Old 09-30-2009, 03:19 PM
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Most of those old solenoids can be rebuilt...of sorts. If it can be taken apart you will find a large copper disk attached to the rod that moves in and out of the coil. If that copper disk is worn it can be turned around exposing a clean face to the contactor.

Vince
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Old 10-01-2009, 12:09 AM
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Quote:
Originally Posted by 302 Z28
Most of those old solenoids can be rebuilt...of sorts. If it can be taken apart you will find a large copper disk attached to the rod that moves in and out of the coil. If that copper disk is worn it can be turned around exposing a clean face to the contactor.

Vince
good tip
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