Question about 1988 Jeep Cherokee

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I tried splicing in extra fog lights to the factory fog light wiring on my 1988 Jeep Cherokee limited, when i turned on the switch there was smoke from under the relay cover under the hood

Now the power locks and stereo don't work any suggestions?

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  • Liam Drake Jan 07, 2013

    and the fog lights don't work either

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  • Jeep Master
  • 2,534 Answers

Well sir, I guess you learned that can't be done!
So, what to do. You have accidentally toasted some of your wiring.
If you are blessed, it is only a fuse, but the smoke says you may have to do serious rewiring. Unfortunately, there is no instruction to tell you this ahead of time.
In the old days, you could have done this (40 years ago), but nowadays, all the electronics go through the computer, and the wires and circuitry, are very delicate, so any disruption or overload can go so far as to even burn your vehicle up.

Here's how to wire up those extra lights.
You will need to run all new heavy-duty wires from a power source to a switch on the dashboard to the lights and maybe to a relay as well.
I don't mean a relay already in the car, you'll need a special one just for those new lights.
All new wires, and be precious careful where you select a power source.
Lot's of people go straight to the battery terminals, because you will need two wires to each light, a hot wire and a ground wire.
I recommend you add an inline fuse-holder to the hot wire as soon as it leaves the battery.
I also recommend soldering all connections.
Route all your wires so they don't touch moving parts or get cut by sharp metal.
Be blessed

Posted on Jan 08, 2013

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SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...

There could be a fusible link under the hood off the starter relay that is burnt out.

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SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...

I think I have found the problem. When I wiggle the ignition switch the turn signals and radio go on and off so I feel the issue is in the ignition switch. From what I understand the actual electronics for the switch are at the base of the sterring column behind the lower dash panel and is connected by a rod that may need adjusting.

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SOURCE: 03 Jeep Wrangler fog lights won't turn on

There seems to be a problem on the power side. You should have at least one terminal at the relay that is hot. The switch activates the relay and transfers the power from the "live" terminal to the hot lead to the lights. Good news is you can completely disconnect fog lights and make your own harness (including a relay) and use a push button or toggle switch on the dash, just like the aftermarket add on lights use! (and it's likely cheaper and more reliable than the original setup)

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Do you have the owner manual???? Are you might can go to a junk yard and fine a cover out of a wreck jeep???? You should be able to also go on line and fine a wiring diagram????

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SOURCE: 98 Jeep Cherokee Fog lights

It's definitely the switch...I bought two of 'em so far...known bug. I don't use the fog lights as much anymore , but the "Airtex" oem equivalent switch from Rockauto seems to be holding up well. If you dissamble your broke switch you'll probably see evidence that it is beginning to melt and theres alot, maybe too much, grease, which may or may not have been the cause of the bad, heating contacts inside switch.
If I remember right, even though the foglights have a relay there is still full amperage going through the switch or something....don't qoute me on that last statement.

Posted on Feb 14, 2009

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