Is this factory?
06-12-2012, 12:57 PM
#1
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Year: 1987
Model: Comanche
Engine: I6 4.0L
Is this factory?
1987 Jeep Comanche MJ
Been having issues with my Alt. not charging my battery I've been told that this box is used for a dual battery setup. Anyone seen this before. I dont want to run 2 batteries so can i just remove it and run the wires to my battery?
Been having issues with my Alt. not charging my battery I've been told that this box is used for a dual battery setup. Anyone seen this before. I dont want to run 2 batteries so can i just remove it and run the wires to my battery?
06-12-2012, 06:48 PM
#3
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Year: 2000
Model: Cherokee
Engine: 4.0
doesn't look factory to me. and I'm sure someone with more experience will chime in and show you a wiring diagram, but yeah you should be able to pull it out and run wiring from the alt to the battery.
ps. send that my way if u do remove it! haha
ps. send that my way if u do remove it! haha
06-13-2012, 12:50 AM
#4
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Not factory.
06-13-2012, 07:29 AM
#7
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yeah, it looks like a battery isolator.
i'd find out what is missing, if it's just a battery, get one just like the one you have, hook it up and you're good for almost any electronic upgrade you want.
i'd find out what is missing, if it's just a battery, get one just like the one you have, hook it up and you're good for almost any electronic upgrade you want.
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06-13-2012, 07:36 AM
#8
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Year: 1987
Model: Comanche
Engine: I6 4.0L
It has a battery box in the bed used to power fans and a light in the bed cap. Im going to keep it and maybe eventually install it back but right now i just want to get it back on the road.
06-13-2012, 07:44 AM
#9
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Year: 1996
Model: Cherokee
Engine: 4.0
That is indeed a multi battery isolator, which should facilitate in charging BOTH batteries that are connected to it. With that being said, it looks older, and if you're not properly charging your main battery, I'd suggest you bypass it temp to see if this resolves your charging issue. if it does, then the battery isolator has most likely gone bad.
06-13-2012, 09:13 PM
#10
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Year: 1987
Model: Comanche
Engine: I6 4.0L
alright removed that battery isolator today and connected the 3 leads to my battery terminal connecters. The black wire runs from the stud on back of the alt. im assuming thats a ground so i put it to the ground terminal. The 2 red wires, one from the main harness and the other from the alternator connecter that plugs into the back of the alt. I ran those both to the positive terminal connecter. I then started it up and it still wasnt charging. then I disconnected all the wires and used a multimeter to test if i was getting 14V at any of them...the ground no, wire from the alt connecter and the main harness positive had a ~12V.
Does this system have a voltage regulator? or is my alt. shot?
Does this system have a voltage regulator? or is my alt. shot?
06-13-2012, 09:31 PM
#11
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Year: 1989
Model: Cherokee
Engine: 4.0
Originally Posted by XJ?2010
alright removed that battery isolator today and connected the 3 leads to my battery terminal connecters. The black wire runs from the stud on back of the alt. im assuming thats a ground so i put it to the ground terminal. The 2 red wires, one from the main harness and the other from the alternator connecter that plugs into the back of the alt. I ran those both to the positive terminal connecter. I then started it up and it still wasnt charging. then I disconnected all the wires and used a multimeter to test if i was getting 14V at any of them...the ground no, wire from the alt connecter and the main harness positive had a ~12V.
Does this system have a voltage regulator? or is my alt. shot?
Does this system have a voltage regulator? or is my alt. shot?
06-13-2012, 09:36 PM
#12
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Year: 1989
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Engine: 4.0
If by stud you mean that little 10mm gold nut. That's you + charging wire.
The other 2 wire plug at the top are the signal wires for indicator and ecu.
06-13-2012, 09:38 PM
#13
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Year: 1987
Model: Comanche
Engine: I6 4.0L
Great... so When I tested that wire with the engine running it came up with 0 volts so i'd say the alt. is shot. I love PO janky *** wiring.