Question about 1998 Dodge Ram 2500 2WD

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I have a 98.5 Ram 2500 diesel. I am looking for wiring diagrams to figure out how to stop the clock and overhead compass/temperature display from dimming when the headlights are turned on. I run with my headlights on all the time. During daylight hours it is very difficult to read these two displays. Sincerely, Eric

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  • ejjaeger Aug 30, 2010

    It is not a grounding issue. When the headlights are turned on, the brown/yellow wire to both the overhead console display and the clock on the radio is energized to a constant 12v. The orange wire is then energized to between 0 and 12v depending on how dim the dashboard lights are (0v being off).

    I had hoped to find these wires at the headlight switch so that I could splice in a switch to turn these wires off so that the displays would not dim but the wire colors are different at the switch. I ended up removing the radio and overhead console and splice into the wires there.

    Thanks for your reply.

    Sincerely,

    Eric

  • ejjaeger Aug 30, 2010

    No, it was not correct.

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  • Dodge Master
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This is easy to do if you cannot get the right wiring diagram ,now when they dim its because the power is reduced to the bulbs ,now how this is done is by the earth its wired to the lights ,so when the lights are turned on their is no or limited earth ,Like a back light with a dodgy earth ,put the stop lights on and the side lights go out or they all light up ,i think that if you run a seperate earth to each of the units they will be bright all of the time

Posted on Aug 29, 2010

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