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XJ Ask the Question Thread
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Basic electrical/automotive question:
Camaro won't start. Multimeter reads .83V on the battery, and my buddy's XJ couldn't jump it. If I pull the battery from the YJ (pull it out; not jump with the YJ running), how do I hook it up to increase amps instead of running 24V? Noob question, I know. I'm on my phone.
Camaro won't start. Multimeter reads .83V on the battery, and my buddy's XJ couldn't jump it. If I pull the battery from the YJ (pull it out; not jump with the YJ running), how do I hook it up to increase amps instead of running 24V? Noob question, I know. I'm on my phone.
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Basic electrical/automotive question:
Camaro won't start. Multimeter reads .83V on the battery, and my buddy's XJ couldn't jump it. If I pull the battery from the YJ (pull it out; not jump with the YJ running), how do I hook it up to increase amps instead of running 24V? Noob question, I know. I'm on my phone.
Camaro won't start. Multimeter reads .83V on the battery, and my buddy's XJ couldn't jump it. If I pull the battery from the YJ (pull it out; not jump with the YJ running), how do I hook it up to increase amps instead of running 24V? Noob question, I know. I'm on my phone.
It needs to be pulled and slapped on a charger
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Same way you jump it. Neg to neg, pos to pos. when you jump you're connecting a good electrical system to a marginal one. Your buddy's XJ couldn't boost your junk Chevy because you were connecting a good system to a dead one. The YJ's battery won't work either. That battery will just suck down all the power available.
It needs to be pulled and slapped on a charger
Senior Member
Joined: Apr 2012
Posts: 638
Likes: 0
From: Huntsville, Tn
Year: Different Years (I have several XJ's)
Model: Cherokee
Engine: 4.0 HO
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Related question:
The internet tells me
True?
The internet tells me
Originally Posted by The Internet Is A French Model
use battery from good car. take out and put in car that wont start. start it. take out battery and car will stay running without battery in it for a few minutes (alternater will keep charge). you ll have enough time to put dead battery in car and connect up. keep car running and alternater will re charge battery. put good battery back in the car it came from
CF Veteran
Joined: Sep 2011
Posts: 10,447
Likes: 0
From: Frederick, MD
Year: 1989
Model: Cherokee
Engine: 4.0
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Nope. Pinion needs to be pointed up at the xfer case output. That's low. Probably work okayish with a transfer case drop sorta.
This isn't OEM tech anymore so I won't go into more detail. There are tons of threads on SYE setup you can look at.
If your alternator isn't regulated by the PCM and don't have EFI sure. Anything newer than the 70s and you risk blowing the PCM.
And still your car will die when you put the original battery back in lol. Alternators aren't meant to charge from DEAD, it'll probably stall out
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6