Hello all... Call me dumb but this morning I had to jump my truck.So being in a rush and low light conditions I managed to cross the cables.With that said I had screwed something up.When I try to start it just cranks.I checked all maxi fuse and all under the dash.I have notice while checking fuses.My dome lamps never turns off.When I push the jam switch in they dime but don't shut off.Pull fuse and they go out of course.So I've come to the conclusion I shorted something but I what IDK..Any help in where to start would be great full.

 

Sounds like ya left interior light on which killed battery turn headlight switch **** clock wise . see if light goes out when doors shut of course ....Have you checked fuses for power on both sides with key in run position.

 

yeah all fuses checked out ok.Checked all switchs,all off.I can't get it to start even with it being jumped correctly.Just cranks but won't fire.Hope its not the ECU since I just replaced last mouth because of it not sending out a injector pulse.

 

Not sure what to tell you about your dome light, but it is not uncommon to fry either the computer, the alternator, or both when you cross the cables on a jump start.

I'm guessing computer in your case. I think I'd start by sourcing a different computer from a salvage yard and install that and go from there.

Good luck and keep us updated!

 

You could've killed the battery or blew your main fuse

 

and where would the main fuse be located?just in case I missed it.

 

It can't hurt to disconnect battery and see what happens. Maybe the computer will reboot.

 

What year?

 

Yea, and check every single fuse in the thing. Those three above are about the best here...curious..how long, and how well was it hooked up backwards?

Do you hear the fuel pump run a couple secs when you turn the KEY on? Got spark?

Key...

 

I've never heard of that being necessary to get an XJ started.

 

Still cant figure out why every one jumps to the most costly fix for a issue first . KISS . fuses first the fuseable links then go from there but why listen to a guy whos worked on automobiles longer than most on here have been alive ....jm2cw easy fix would be junk jeep buy a new one .

 

its a 96 and it check every fuse..bone yard today to pull whatever I can find.

 

KISS. Haven't heard that one it awhile, lol but I agree. To many jump to elaborate and huge problems when it could be a dollar fix. Start small and work your way up.

 

how much fuseable link is there?

 

Fuse must be checked for power in and out . With key in run position. Then go from there . Under dash and under hood .