Member II
Started my XJ today and noticed the door locks won’t unlock and the windows roll down slowly. Is this a problem with the controls?
Door locks and windows slowing down
- Thread starter Jeepmedic46
- Start date
Member III
- 2,827
- First Name
- Joshua
- Last Name
- Downs
- Member #
-
20468
- Ham/GMRS Callsign
- KK6RBI / WQYH678
- Service Branch
- USMC 03-16, FIRE/EMS
Could be a multitude of problems. Battery going dead, alternator getting worn out. At idle speeds your alternator isn't putting out as much power as it does at higher engine speeds so your higher load electrical items are running off battery power.
One thing you need to make sure are 100 percent up to spec on these XJs especially since the youngest ones are pushing 20 years old at this point is the grounds. And I'm not talking about just looking at the grounds and saying yup they look good. You need to remove them, clean them and then reinstall them. I would suggest also doing a full battery and ground cable replacement either though cables you build yourself or the kits places like Mean Lemons sells. Your charging system will thank you.
Also keep in mind as wiring gets older it's electrical resistance goes up. This will make items run slower over time.
The door lock issue could be the controls or could be as simple as a blown fuse.
One thing you need to make sure are 100 percent up to spec on these XJs especially since the youngest ones are pushing 20 years old at this point is the grounds. And I'm not talking about just looking at the grounds and saying yup they look good. You need to remove them, clean them and then reinstall them. I would suggest also doing a full battery and ground cable replacement either though cables you build yourself or the kits places like Mean Lemons sells. Your charging system will thank you.
Also keep in mind as wiring gets older it's electrical resistance goes up. This will make items run slower over time.
The door lock issue could be the controls or could be as simple as a blown fuse.
Member II
It’s a new battery and I believe when they put the new engine in the changed the alternator. I forget what the amps on the battery are. I’ll check that out tomorrow. I started it because it was cold out last night. What amperage should the battery be? I know when I get the winch I’ll need to go to a dual battery system. The truck was just sitting when I tried the windows. I’ll try and look at it more tomorrow. Thank you
Member III
- 2,827
- First Name
- Joshua
- Last Name
- Downs
- Member #
-
20468
- Ham/GMRS Callsign
- KK6RBI / WQYH678
- Service Branch
- USMC 03-16, FIRE/EMS
Dual battery isn't absolutely necessary. I ran a winch for years on a single battery, just make sure your battery is in good shape. The XJ doesn't have a ton of space under the hood for a second battery to start with. The stock alternator on the XJ puts out 90ish amps. You can upgrade to a 113 amp alt off of a Grand Cherokee or a Duran go with a little grinding modification.
Battery size originally is a Group 34 size battery with 650ish CCA IIRC.
Member II
Member III
- 2,827
- First Name
- Joshua
- Last Name
- Downs
- Member #
-
20468
- Ham/GMRS Callsign
- KK6RBI / WQYH678
- Service Branch
- USMC 03-16, FIRE/EMS
Sorry forgot what year your XJ is. Late models (97+) used Group 34 batteries and earlier models took Group 58 batteries. I think a 34 will fit in a an earlier model but can't remember right off, I'd need to do some NAXJA searching.
Member II
My XJ is a 2000. I can’t wait to register it. Waiting for the dealer to pay us back for the 150 with the rotten frame so we can just transfer the plates.
Member II
Turns out my electrical issue on the Jeep was a loose bolt under the dash.
