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Unread 10-23-2011, 04:07 PM   #1
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Join Date: Oct 2011
Posts: 1
1970 cj5 wont charge.

I had the battery tested and it's in good shape. I put a new starter and cylinoid in. It only has one wire coming off it though. It has a newer altanator. I had the altanator tested and it would not put out a reading. I was told that even if it was bad it would still put out a small reading. Any suggestions? I'm at a loss. Thanks a lot.

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Unread 10-23-2011, 04:50 PM   #2
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1971 CJ5 
Join Date: Jan 2002
Location: Eagle Point Oregon
Posts: 6,186
I'm assuming you have the stock Motorola alternator (might want to fill out your profile).
If you had the alternator checked and it isn't putting out any voltage, then my guess is it is bad. If you can get it working and the system won't charge, the next step is to have the voltage regulator checked.
After that, you can check to see if you have power to the alternator warning light (if the light bulb is bad, the charging system won't work) and then on to the alternator itself.
In the end, an upgrade to a GM internally regulated alternator can be done with a minimum of effort.
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