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Old 10-24-2010, 07:18 PM   #1
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Wiring Help Needed

So a few months ago I sold my much loved 5 series BMW and bought a YJ due to the fact I am broke from University tuition and thought the extra cash would help with that. I've had a few too many adventures with the Heep already... valve cover gasket leaking copious amounts of oil 2 hours into a 12 hour journey, doors randomly not latching on the striker for no reason despite greasing, water shorting out the expensive aftermarket stereo in a rainstorm from the leaking cowl seal (since replaced)... nothing too major, but annoying none the less. I've Herculined the interior and cleaned the PO's mess up, flush mounted round tails, painted the hardtop and a number of other things and am finally dealing with the last few annoyances.

I've gotten the rear wiper to work, but I can't get the defrost to work. I think there must be a relay as I can't find a fuse??? Where would this be on a 1992? Also my dome lights don't work, I wired a new light to the existing hardtop harness but the underdash lights don't work either. I replaced a faulty door trigger switch but there is NO FUSE in the fuse box. As in like no contacts where it says Dome... I pulled the box out but there are no loose wires or evidence that there was ever a fuse in there. I have a loose red plug attached to the wiring harness near the e-brake pedal, maybe this has something to do with it? What's the deal here? I am really sick of the dark:)

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Old 10-24-2010, 07:29 PM   #2
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that red thing is the timer relay for the hardtop defroster.

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Old 10-25-2010, 03:01 AM   #3
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Thanks, that at least explains the defrost. Where does it connect to? Underneath the steering column somewhere? I don't know why people have to screw around with all the wiring, there are so many wires tapped into the fuse box it's a intimidating to say the least... I got most of them back into their proper places but I can't figure the dome light fuse missing. The white connector underneath the fuse box is for engine management I am thinking?

Maybe it is time to break down and get a manual I guess... everything else so far has been straightforward, brakes, u-joints, fluids... It seems funny to get stumped on interior lights!
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Old 10-25-2010, 02:45 PM   #4
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On mine the dome fuse in the panel under the dash is second row from bottom and second in from the left. A lot of folks remove the fuse when they run without doors
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Old 10-25-2010, 04:57 PM   #5
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OK, for some reason I was thinking the defrost timer relay would be attached to something and the red plug was just unplugged, but when I reread the post I realize mine is just missing the relay all together. (duh) I must have been really tired last night. I will stop by the stealership later and pick one of those up and see if that fixes the rear window.

And, yeah, I can see where the fuse goes, there are no contacts inside though, no metal prongs... I get why people would take the fuse out, but mine looks like there was never a fuse there, despite the fact I do have dome lights.
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Old 10-26-2010, 08:04 AM   #6
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if you haven't already, check the electrical connections on the rear window liftgate struts.

there is a single wire with a spade terminal on each side
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Old 10-27-2010, 12:18 AM   #7
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Thanks Timberwolf that is a good tip, two were ripped but I repaired them when I painted the hardtop, so will try the timer relay which I still haven't gotten a chance to pick up. Maybe I should just wire the other lights up independently of the original circuit... but that would require a little more time than I have right now!

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