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strange electrical/charging issue?

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    #1

    strange electrical/charging issue?

    I've changed the alternator 3 times and then had them all tested to see if I just kept getting duds. They all passed and passed being under load. I also replaced the battery 3 times. They also came back as good. The car will start and run fine but the lights will slowly dim and after about 30 minuets the battery light comes on and it starts to back fire and stall and the battery will be too weak to power the starter. If I let it sit for 5-6 hours though it has power to start again. No burning wire smell, no blown fuses. Any ideas?
    Tags: None
    #2
    Check fuse #2 in the under dash fuse box.

    Next check the plug for proper connection. Also test for an open circuit.

    Black Housing DIY 1991 Wagon Morimoto Retrofit
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      #3
      Factory radio setup or aftermarket?

      Comment

        #4
        Originally posted by djcaz_aom View Post
        Check fuse #2 in the under dash fuse box.

        Next check the plug for proper connection. Also test for an open circuit.
        I'll test for an open circuit, didn't even think of doing that.

        Originally posted by 92LxCoupe92 View Post
        Factory radio setup or aftermarket?
        No radio at all, just the oem plug sitting there.

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          #5
          Check the voltage being generated at the alternator, then at the battery. Check all the wiring in between for good connections. Check to make sure both main battery cables are in good shape and particularly that the ground cable is well attached at the engine end.
          90 LX 4dr 5 spd 396,014 (sold 1/1/2022) - MRT: http://www.cb7tuner.com/vbb/showthread.php?t=201450
          08 Element LX FWD AT 229,000 - MRT: fleetw00d : 2008 Honda Element LX - CB7Tuner Forums

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            #6
            Stupid question; When you are buying these alternators, do they come with a new voltage regulator, or are you reusing your old one?
            CC2 Vigor.

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              #7
              Originally posted by Vermonter View Post
              Stupid question; When you are buying these alternators, do they come with a new voltage regulator, or are you reusing your old one?
              I had same issue with my 93. I tried 3 different alternators. Two new (reman) one Denso from wrecked 92 accord. All three with different voltage regulators. (even tried swapping regulators around). Couldn't find anything wrong with fuse #2, all connections were good, forced a load on eld, (the audio amp, relay/resistor trick.) Was told by a Honda Tech it could be ECU or faulty ELD. I never did figure it out. It's a doner for my 91. If you have about $150 laying around Honda can do diagnostics and tell you what's wrong with it.
              Sorry couldn't help more than somewhere to look at. Hope you figure it out.

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                #8
                I know the main relay will cause issues on a hot day, but I'm wondering if there are other symptoms related to the main relay such as what the OP is trying to convey.
                It might be worth finding a junkyard main relay, swapping it out, and seeing if the problems persist?
                CC2 Vigor.

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