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Unread 02-27-2012, 06:45 AM   #1
DIYMechanic
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Join Date: Dec 2011
Location: Wooster, OH
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2002 KJ Speedometer and Odometer Inop

Hey all, I am back again. After the trouble we had with the engine in Dad's new (to him) KJ, we were just glad to have it running. Now that he has been able to put a few miles on it, we're turning our sights on some other little issues. The first of which is the fact that the speedometer and odometer don't work. Nothing. Zero. Nada. The tachometer and the rest of the gauge cluster work just fine, but the speedo and odo are a no go. I have checked all the fuses, relays, etc, we replaced the speed sensor as well (there was one in the console when we bough the Jeep). Still nothing. We did find a place in the wiring harness near the sensor that was chaffed enough that the insulation was rubbed through. We cut out the bad section of wire, shortened the harness and soldered things back together, but still nothing. Is there something we can try short of replacing the instrument panel?

Thanks in advance for the advice.

--DIY

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Unread 02-28-2012, 05:07 AM   #2
DIYMechanic
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Quote:
Originally Posted by Powerslave View Post
Come on, seriously? I did try the search function and for whatever reason it wasn't working for me. It was pulling up results from all over the forum sections and not limiting them to the KJ section.

Also, I have already tried replacing the speed sensor on the rear differential and I have spliced the wires, as I stated in my post above.
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Unread 02-28-2012, 06:15 AM   #3
forcrz6
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What I would do if I was you would be to take the instrument panel out and look at the Circuits. More than likely if the wires going to it were shorted out, then something on the panel its self may be burned out. That will let you know what way you have to go. If the panel is good, then you know that the issue is behind it.

Does the LED odometer even light up?
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Unread 02-29-2012, 04:57 AM   #4
DIYMechanic
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Nope, the odometer doesn't even light up. Speedometer doesn't move, nothing out of that gauge at all. I appreciate the input.

Does anyone know if there is a way to test the signal coming from the speed sensor with a DVOM to determine that it is indeed sending a signal? I would hate to go through all this only to find that it is a bad sensor right out of the box or a wiring issue somewhere else along the circuit.
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