Question about 1990 Chevrolet Caprice

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No heat no power coming out of my blower motor relay and I have replaced the relay twice fuse is good and resistor and blower motor are to there is a purple wire going into my blower that gets no power

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  • Master
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If the relay is getting no power that's the problem. There are 2 sets of power going to this relay, the control signal (the power that comes from the switch on the dashboard turning on the relay), the second is the much greater power supp[lied to the blower motor itself. You need to test using a multimeter, the relay base to see if you have both signals there.

Posted on Jan 24, 2013

  • jealouzie
    jealouzie Jan 24, 2013

    the power ggoing into the relay (red) is good current and the wire going out (purple) is no current here is also a purple wire going into my blower motor that has nopower

  • jealouzie
    jealouzie Jan 24, 2013

    ther is only power inone of the five wires on the relay

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Check the fuses if the fan speeds do not work. The fuses for the interior heating and air conditioning fan are usually under the hood in the fuse and relay center. If the fuse looks good, then take it out and turn the ignition key on and use the volt meter set at 20 volts DC. Check to make sure that there is voltage to the fuse. If not, check for an open circuit to the fuse.

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