Question about 1989 Jeep Cherokee

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Im getting no spark from the coil even after replacing it. it starts when it wants to do to a short

Repalced the coil test the chareging system and thats fine to. i have a short somewhere. where can i buy a new wiring kit for the whole truck. the rear tail lights dont work when i trun on the driving lights for night. i know the wiring is bad i just need to know where i can find a new wiring kit.

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  • yadayada
    yadayada May 11, 2010

    have you tested the system for trouble codes?

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Change the crank sensor located on drivers side of bellhousing

Posted on Jun 11, 2009

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One speaker does not work power is going to white connector. Is there any way of opening the speaker to test wires going into speaker?


Just take the wire harness off the speaker and use a ohm-meter to test the resistance across the negative and positive terminals of the speaker. It should be about 3 - 6 ohms (if it's a little more that's fine). If the resistance is infinity (the needle or digital display doesn't move) the coil is shot and you should replace the speaker.

If for some reason the resistance is less than 2 ohms, I would also replace the speaker as there could be a short in the speaker coil somewhere. This could cause failure of the deck, due to short circuiting. Also, if the foam/rubber surround of the speaker is torn or has holes in it replace the speaker.

The thing to take away is: you are testing the speaker, with a meter, to see if it has fried its voice coil, and to make sure it looks OK mechanically by visual inspection.

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VALVE COVERS CAN LEAK INTO THE COIL WELLS AND SHORT OUT THE COIL. BUY A NEW COIL AND INSURE THAT THE PLUG IS GOOD AND NO OIL IS IN THE COIL WELL.

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The PCM doesn't supply power to the coil's ,it supply's a ground . A fuse supply's B+ power to the coil's . Your vehicle has what is called coil on plug ignition system , a coil for each cylinder . Should have plug wires ,has a spark plug boot . IT is common for these coil on plug system's to fry the driver (transistor) inside the PCM ,if the spark plug gap becomes so worn that the spark can not jump said gap. It shorts inside the coil sending high voltage to the PCM driver . There are video's on youtube showing how to test a PCM driver circuit . Your coil has two wires , one should have B+ voltage an the other goes to the PCM . If your coil fried i look for a short to ground on the control side circuit . This video is for a ford 5.4 l V-8 coil on plug system ,same thing just 2 more coils .
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My 93 nissan altima stalled while driving and will not start back. put on a new coil, new fuel pump. still will not start. is it the crank sensor or distributor?


First, verify all connections at distributor (both ends of each cable) are securely connected and inspect all lengths of each plug wire to make sure there are no major breaks, cuts, burns, abrasions that would be causing a short. Then, try another plug just to make sure it's not a bad spark/coil wire. If still no spark, then I would say rotor/distributor cap/distributor/ICM module (Ignition Control Module) is the problem. You can generally buy those parts seperate, or you can buy a whole distributor that typically has all combined. The ICM can usually be removed without too much difficulty and taken to an autoparts store for a test, but not always. If you go with the "piecemeal" solution, start with ICM test (if removable), then rotor cap, then move to distrubutor cap. If nothing has worked to this point, you can replace the distributor, but you have already bought everything BUT the actual distributor. It would make sense to price everything seperately versus cost of new distributor...up to you.

If you do replace the distributor, be absolutely sure to mark the position/direction the rotor cap is pointed on old one, so you can re-install the new one in exact same position. Otherwise finding TDC (top dead center) on #1 cylinder is another whole process.

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...stolen from another webby

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New battery is drained. Alternator was tested and was fine. In testing both on the car, sometimes there is a current charging the battery, sometimes there isn't. is my alternator test wrong? is it the...


You either have a short in the wiring or a problem with the voltage regulator. Check the plug at the alternator and move some of the wires around while the alternator is being checked to see if output changes. This will help locate a wire that is shorting out. I had a wire shorting out inside the plug and I pulled it out, stripped some insulation, and re-soldered it into the plug. Anyhoo, sure hope this helped ya, and good luck.

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Electrical problem in motor home


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Engine control fuse keeps blowing


hi,

you can try marking (taping and marking) then undoing the fuel injector wire harnesses one by one to see if you have a shorted injector, that can cause that, or a shorted coil pack can cause that too, you can try the same thing on that. If it isnt either of those then I would recommend taking it in rather than nickel and diming yourself. Good luck with your baby!

J

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