Question about 1992 Dodge Ram 250

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Overdrive drops out, cruse control quites, speedometer quits, and air conditioning compressor quits, some times lights on the dash flash (so fast i can't tell which one). it might run like this for 1 mile or all day, or even 2 days. I've changed the ingnition swith a few weeks ago, the speed sensor a month before that, I thought that changing the ignition switch fixed the problem, guess not.

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  • bmarshallcor Sep 09, 2010

    overdrive drops out, cruse control quites, speedometer quits, and air conditioning compressor quits, some times lights on the dash flash (so fast i can't tell which one). it might run like this for 1 mile or all day, or even 2 days. I've changed the ingnition swith a few weeks ago, the speed sensor a month before that, I thought that changing the ignition switch fixed the problem, guess not.

    when i hit a bump in the road is usually when the problem starts or tops. i believe its a grounding problem but don't now where to start looking.

  • bmarshallcor Sep 10, 2010

    I forgot to mention that this is a 1992 D250 Diesel, 2 WD. i don't know if that makes any differance. can you give me any idea where all a could start looking for bad grounds, Like i mentioned before it seem like i have problems when i hit bumps?

    I took this truck to a Dodge dealer tofix the problem, they said no one in their shop had any experiance working on one this old.

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HI! One thing can resolve this. The PCM (powertrain control module) may need to be resetted. THe PCM has connectivity on all electrical current that runs inside the car including the engine, transmission, etc.. If the PCM is faulty, things will definitely fail. I strongly suggest that you have the PCM resetted to resolve the problem. If the PCM is badly damaged this will surely require replacement. HOpe this helps and thank you for using FixYa!

Posted on Sep 09, 2010

  • dj_relly999
    dj_relly999 Sep 10, 2010

    One good place to start is to check the battery's body ground. It may be a little loose which can cause this problem. Try to secure the body ground.

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Is the brake light coming ON When you press the brake pedal.If its not coming ON then check the brake light switch.Also check the wiring connector that plugs into the speed sensor. Also check the cruise control switch.
Check the vacuum hose that runs from the right side of the engine across the front and then under the battery pan. Find that hose and inspect it along its length. the servo under the battery,it is a round looking gadget that has some vacuum lines hooked to it.The acid from the battery sometimes leaks onto the lines and eats the hoses.You may have to remove the battery to check it.Also if there is check engine light coming on then get dodge ram scanned at diagnosis center to get error codes, At diagnosis center you will receive the error code. As per the error code it will detect the exact faulty part in the car due to which the problem is occurring. For more help: --- at www.autozone.com it’s absolutely free to get car scanned. Thanks. keep updated for any more query.you can rate this solution and show your appreciation.


Posted on Sep 09, 2010

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