89 Cherokee not charging ?
#1
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Year: 1998
Model: Cherokee
Engine: 4.0
89 Cherokee not charging ?
Need help please, my 98 Cherokee suddenly stopped charging. Alternator was bench tested at oriellys and it is working fine. Optima battery tested fine after being charged. I discovered that the voltage regulator is in the ECU. Any Ideas please.
Last edited by COBRAMAN5.0; 05-02-2017 at 08:52 AM. Reason: listed wrong year
#2
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It is my understanding Renix era voltage regulator is in the alternator, someone correct me if I'm wrong. I would suspect a bad connection or wire in the charging circuit somewhere.
The ol Cruiser's ground tips might be in order.
The ol Cruiser's ground tips might be in order.
#4
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I think the voltage regulator is in the alternator as well on Renix era XJs. Also....be aware that bench testing of alternators is not without it's issues; there can be "escapes" (alternators that bench test good at the parts store but are NOT good).
Start with Cruiser's tips 1-5. Grounds are notorious for being an issue on these Jeeps. Cruiser knows his Renix Jeeps. (Cruiser....how am I doing here? )
Make this link a bookmark.
http://cruiser54.com/
Start with Cruiser's tips 1-5. Grounds are notorious for being an issue on these Jeeps. Cruiser knows his Renix Jeeps. (Cruiser....how am I doing here? )
Make this link a bookmark.
http://cruiser54.com/
Last edited by tjwalker; 05-01-2017 at 06:27 PM.
#5
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Year: 1990
Model: Cherokee (XJ)
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I think the voltage regulator is in the alternator as well on Renix era XJs. Also....be aware that bench testing of alternators is not without it's issues; there can be "escapes" (alternators that bench test good at the parts store but are NOT good).
Start with Cruiser's tips 1-5. Grounds are notorious for being an issue on these Jeeps. Cruiser knows his Renix Jeeps. (Cruiser....how am I doing here? )
Make this link a bookmark.
http://cruiser54.com/
Start with Cruiser's tips 1-5. Grounds are notorious for being an issue on these Jeeps. Cruiser knows his Renix Jeeps. (Cruiser....how am I doing here? )
Make this link a bookmark.
http://cruiser54.com/
Yes, indeed the voltage regulator is in the alternator. There's an easy test if the OP is interested.
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Year: 90,84
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Edit, Whoops! I read "89" ? Did you change that? (big differences)
Cobra, you might check the yellow trigger wire at the alternator plug for power with the ignition on.
TJ-0P.......89-90 don't need the appropriately named #2, no C-101 connector.
(Just on 87-88)
Cobra, you might check the yellow trigger wire at the alternator plug for power with the ignition on.
TJ-0P.......89-90 don't need the appropriately named #2, no C-101 connector.
(Just on 87-88)
Last edited by DFlintstone; 05-02-2017 at 09:52 AM.
#7
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Year: 1998
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Thanks for the posts, Yesterday I checked and rechecked all of the grounds with my power probe, put a different battery in to eliminate that. Checked power at back of alternator and at the power dist terminal on the post which only came up to 12.1 with lights, radio and ac on, but gauge went all the way down to 9. At one point the gauge did come back up to 14 and the alternator was making a different noise like it was working so I took off down the street and the gauge went back down to 9. Also swiched out the ASD relay with another good one. Plan today is to take the alternator back to the parts store and check again. I just didn't want to buy an alternator if it wasn't the problem. I heard that some of the Chrysler voltage regulators were in the pcm? My jeep is a 98 4.0 with automatic overdrive and a 242 tx case, trans is a 30-43LE dana 30 front, Chrysler rear. Limited Edition with leather one owner before me with 155,000. bought in Cali and drove back to Oklahoma. very clean with a stack of service records. Now has a Rusties 4.5 lift, 33 inch tires, roof rack, k/n, JBA header and SCT tuner. Sorry I'm dyslexic my jeep is a 98 not 89
Last edited by COBRAMAN5.0; 05-02-2017 at 08:55 AM.
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#8
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Year: 1990
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Thanks for the posts, Yesterday I checked and rechecked all of the grounds with my power probe, put a different battery in to eliminate that. Checked power at back of alternator and at the power dist terminal on the post which only came up to 12.1 with lights, radio and ac on, but gauge went all the way down to 9. At one point the gauge did come back up to 14 and the alternator was making a different noise like it was working so I took off down the street and the gauge went back down to 9. Plan today is to take the alternator back to the parts store and check again. I just didn't want to buy an alternator if it wasn't the problem. I heard that some of the Chrysler voltage regulators were in the pcm?
#10
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#12
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Thanks everyone, I had already done everything you guys mentioned before I posted this. Thought there might be something I didn't know about Jeeps. Turns out it was the alternator. Had mine bench tested several times ? and it always passed. Thanks again
#13
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#14
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My XJ does not have a ground at the dipstick, it has a ground strap attached to the back of the head. Thanks I will explore your site some more.
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if the car starts the heavy connections are good. if alt has normal field control volts and the output is low it points to the alt which is solidly bolted to ground.
even with a weak batt. ive had cars start that barely turned over. alt volts came up normal.
even with a weak batt. ive had cars start that barely turned over. alt volts came up normal.