Question about 1992 Dodge Ram 250

2 Answers

Charging system mystery

Air conditioner went out first. 105 lbs freon on the low side. Blower for air and heat blows fine. Then the charging system stopped. Jumped the alternator and it charges when exturnaly powered from the battery. Led me to think the ECM was the problem. Replaced it and the charging system is not working again after one day of new ECM. BTW, Battery is 4 mo. old. What next?

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  • fascarman Sep 07, 2009

    I'll look for the fusable link tomorrow but why would the new ECM allow charging for a day before stopping? I would think that if the fuse was blown that the new ECM would not have been effective even for one day.

  • fascarman Sep 24, 2009

    None of the solutions given by members was at all helpfull, not even close. Even the local, well respected auto electric shop gave up after a week. I took the truck to the dealer , who found the problem right away. It was the crank trigger sensor which if not working can't tell the computer that the engine is running. Therefore if engine isn't running why do you need the air conditioning system or the charging system turned on.

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  • Dodge Master
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SOUND LIKE AIR CONDITIONER SYSTEM IS FULL OF AIR AND MOISTURE.YOU HAVE TO TAKE TRUCK TO AC SHOP.THEY HAVE TO DISCHARGE AC SYSTEM.THEN REPLACE ACCUMULATOR.THEN EVACUATE THE SYSTEM THEN RECHARGE THE SYSTEM.CHECK ALTERNATOR FUSE AND FUSE LINK.IF ALL IS GOOD.REMOVE ALTERNATOR HAVE IT CHECKED OUT AT AUTO ZONE OR ADVANCE AUTO.DUE TO LOCK OUT FEATURES.BESURE TO TURN OFF RADIO.BEFORE REMOVING NEGATIVE BATTERY CABLE.SO YOU WONT LOSE RADIO CODE.

Posted on Sep 07, 2009

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  • Dodge Master
  • 6,674 Answers

There should be a fusible link in that circuit.

Posted on Sep 07, 2009

  • Mike Butler
    Mike Butler Sep 07, 2009

    Sorry, fusible link should run from starter relay to alternator.

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