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1990 Porsche 944 Question: Electrical conundrum

 

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Mr. Bill, w/o Turbo, Oklahoma City, OK, April 11, 2009, 20:00
 Rookie

After about a half hour driving, the radio starts to shut off and on; "drives me crazy". The heater and a/c also comes on and off intermittently. Just replaced with new battery, but want to catch the root of the problem before I have to get another one.

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  • Answer #1

    rdude135 April 13, 2009, 06:52
     Journeyman

    It sounds like there is a power issue. If the radio and HVAC are on the same circuit and turn off intermittently together then I would look at the wiring between the fuse box and components to see if there was a bad connection.

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  • Medium-star Best Answer
    spyder April 13, 2009, 10:16
     Journeyman

    I can't readily account for the radio problem , check connections at the radio itself after checking fuse(s) at the radio and at the fuse box.
    The a/c , heater fan issue is probably the ballast resistor failing. It is located under the plastic cowling for the vent box , passenger side , under the hood.

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  • Answer #3

    Visitor, March 30, 2010, 17:58

    Not sure about this one but it could possibly be the alternator. i had similar problem in my car where the alternator would send surges through the circuits in my car (not porsche, holden) this wouold cause the headlights to blow, gauges to fail, all warning lights to go on and the radio to stop working.

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