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ac fuse blows ???

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  • #578399
    bertbert
    Participant

      winter time here right now…havent used the ac in a while
      but…had to turn it on the other day…no cold air ?

      took it in to the shop,,,,freon evac’d and replaced.

      couldnt test the system for leaks and such cause a 10 amp fuse keeps blowin

      blower in the cab works fine,just blows “warm air” though.

      whats this fuse control ?

      short most like;y the prob but from where ?

      ’98 dodge ram 1500 5.9 eng

    Viewing 6 replies - 1 through 6 (of 6 total)
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    • #578413
      college mancollege man
      Moderator

        Unplug the ac compressor and replace the the fuse with a good one.
        test for 12v at the connector. If you plug the compressor back in
        and the fuse blows the compressor is suspect.

        #578567
        bertbert
        Participant

          [quote=”college man” post=90170]Unplug the ac compressor and replace the the fuse with a good one.
          test for 12v at the connector. If you plug the compressor back in
          and the fuse blows the compressor is suspect.[/quote]

          hmmm THATS A GOOD IDEA !!!!

          but isnt there a relay and a celonoid on the same circuit ????
          or is all that in the comp. ??

          in calif…a shop has to do all ac-freon related repairs.
          makes it expensive to “throw parts at her”
          I’m trying to isolate/pinpoint the prob and cut cost

          If I “hot wired” the comp. direct to batt.as a test(suggested from another forum)…would that bypass all oyher components ?

          #578594
          valdevalde
          Participant

            Yes there is lot of other stuff in the circuit but compressor itself is most likely problem. If you just wire compressor directly to battery (with fuse) you’ll also get same info that is the problem with compressor. You may not have to do anything with “freon” if you only replace ac clutch.

            #578639
            paulpaul
            Participant

              I once had a problem with a bad diode under the hood in the fuse compartment of my 2004 Grand Am. It took a while before I was able to see the relevance through schematics and resolve it. I think it also took care of another peripheral problem aside form the A/C not working.

              Just a thought in case the other ideas leave you still scratching your head…

              Best to You!

              sols

              #578698
              college mancollege man
              Moderator

                [quote=”cj5orion” post=90257][quote=”college man” post=90170]Unplug the ac compressor and replace the the fuse with a good one.
                test for 12v at the connector. If you plug the compressor back in
                and the fuse blows the compressor is suspect.[/quote]

                hmmm THATS A GOOD IDEA !!!!

                but isnt there a relay and a celonoid on the same circuit ????
                or is all that in the comp. ??

                in calif…a shop has to do all ac-freon related repairs.
                makes it expensive to “throw parts at her”
                I’m trying to isolate/pinpoint the prob and cut cost

                If I “hot wired” the comp. direct to batt.as a test(suggested from another forum)…would that bypass all oyher components ?[/quote]

                If the 12v is read at the connector unplugged. Then all the wiring and
                components would be good. I would not wire off the battery with no fuse
                protection. If the compressor is shorted it will pop in your face. Test
                the coil of the compressor with an ohm meter. anything less than 3 ohms
                is a short.

                #578718
                EricTheCarGuy 1EricTheCarGuy
                Keymaster

                  Do not run unfused power to it like that. As College man said, if you disconnect the connector from the compressor and it doesn’t blow, then your compressor clutch is likely at fault. It may also be the compressor. To check that try spinning it by hand. If you can spin it by hand, it’s probably OK. Do this with the engine off BTW. If it spins freely, then just replace the compressor clutch and recheck for the problem.

                  Good luck and keep us posted.

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