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Old 10-17-2013, 07:08 PM   #1
Cpwines18's Avatar
Join Date: Oct 2012
Posts: 14
Dead cj2a

I'm at a loss. Have a 48 cj2a, sat while on deployment, now won't try to turnover.

Troubleshooting: Battery charged and good. Still doesnt try to turn. Replaced the starter solenoid, no change. Replaced key ignition, no change. If I jumper out the solenoid, it fires up and stays running with key in run, so I know it's not the coil, distributor or starter.

Could I have gotten a bad replacement solenoid? I also cleaned all wire leads to make sure they had a good connection. I've reached the end of my knowledge on the subject, was hoping someone with some more experience might be able to point out something I missed.

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Old 10-17-2013, 07:44 PM   #2

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harleydragon's Avatar
Join Date: Jul 2012
Location: south georgia
Posts: 3,911
check to see if the solenoid is getting power to make it pick up when the key is turned..if it is then the solenoid is probably could jump power from the battery to double check that the solenoid is in fact bad..........if on the other hand,you are not getting power to the solenoid when you turn the key then check the wires to the key switch and see if you can find one that gets voltage only when you turn it to start and run it to the solenoid

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Old 10-18-2013, 10:14 PM   #3
Cpwines18's Avatar
Join Date: Oct 2012
Posts: 14
Figured it out. The old solenoid was a three post, this one has four. The guy at the store steered me wrong on wiring it up, and there was no official wiring diagram or explanation. Apparently there are two types of solenoids, isolated and ignition bypass(internally grounded.

To determine which one you have, take the solenoid and touch its case to either battery terminal, then use a wire from the other battery terminal to first the left small terminal & then to the right small terminal......if the solenoid clicks/activates/does anything at all when wire is touched to either small terminal, then it is internally grounded

touch one small terminal to one battery post & use a wire to connect the other battery post to the other small terminal. If it clicks/activates/makes pull-in clunking noise, then you have the isolated one.

If neither activates, it's a good indication the solenoid is bad.

Hopefully this will help someone with the same questions in the future
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