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  • "Hot" speedometer casing

    Has anyone every had the ENTIRE casing of the speedometer "hot" when tested with the light?

  • #2
    Anyone? When I seperated the fuel and temp gauges out of the speedometer they were "sparking" on the inside and I was blowing fuses.....

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    • #3
      Sounds like you've got an electrical short there someplace. Maybe one of the gauges has an internal short.

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      • #4
        do a search for "john Strenk" his sig has a top notch trouble shooting guide.

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        • #5
          Originally posted by scobar View Post
          do a search for "john Strenk" his sig has a top notch trouble shooting guide.
          Here's the link: http://home.roadrunner.com/~john.str...for_cj_gau.htm

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          • #6
            I'll search for him as soon as he returns my first set of gauges I sent him over a 1 year ago and has still not returned them after three requests......(make a note of the annoyed tone)......Painless gave me a tip about a "odd ball" ground that comes with the illumination orange and black wires. They also mentioned their manual kind of sucks for the Jeep rebuilds and that if you go fiberglass it makes the install and chasing these issues even more of a pain.

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            • #7
              I got a glass body and a Centec rewire, give me somthin to chew on, details.

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              • #8
                Redtail, I don't follow? Check out my Youtube videos for some examples of the issues I have been having. I will be retesting this weekend with some different wiring setups and some replacement gauges......

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                • #9
                  Cad, I’m not familiar with the intricacies of your situation and watching a video is out of the question on dial up, but I have a ‘theory’ since you mentioned the glass tub and the presence of voltage on your gauge cluster case. Voltage is present on the entire case of your instrument cluster because it serves as a ground for everything that is fed by positive voltage, the lights and the gauges. If you’re touching your meter to the case and reading battery voltage, it is because the case is not returning voltage to ground. (The voltage is present on the case but it has no place to go. A potential equal to the battery voltage exists between the case and ground. That’s why you’re reading voltage on the case with your meter. I’m surprised anything is working that does not have it’s own unique return to ground. Your fuel and temp gauge share a power supply circuit that is contained in one or the other, I can’t remember now which one. But if you aren’t ‘grounded’ properly, none of this stuff is going to work, and the fact that you are showing ‘potential’ on the case gives me every reason to believe that the speedo cluster isn’t properly grounded. Run a wire from the case straight to the negative on your battery and then check for voltage. A dollar to a donut you have a grounding issue.

                  Strenk is much better on these things than I am but I noticed that he's been conspicuously absent lately. Good luck, Cad.

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                  • #10
                    thanks. I was advised by painless to hook the stand alone ground wire at the instrument knob lights (black and orange ones) to the gauges ground bar. There was a odd ball ground wire I never new what i was for. I ground the gauges tonight (the gauges are out of the casing). Here is what happened:

                    1. Grounded gauges directly to the ground bar with a stand alone wire. Got a spark on the back side of the gauges, fuse blew.
                    2. Grounded gauges with stand alone ground wire per painless. No spark. Fuse Blew.

                    Something is definetly not grounded correclty if I am blowing fuses. I am getting close.....I know what you mean by the 1 hot wiring providing power to the 2 gauges. The red wire, but if one red wire connects to fuel gauge, what creates the bridge for the temp gauge? The casing? The bridge bar with the black rubber on it?

                    I will try again with the old gauges in the casing and with replacement gauges this weekend. Maybe the gauges are blown?

                    I am going to give this one more try and then I am closing up the dash for the summer. I want to drive it and enjoy it. I carry a jeery jug of gas anyways

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