GMC Repair: 2000 Buick Park Avenue - My Rear Window Defogger has stopped - where in the fuse box is this fuse located - owners manual only show RWD, buick park avenue, rear window defogger


Question
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Followup To
Question -
My Rear Window Defogger has stopped working - where in the fuse boxes is this fuse located - the owners manual only mentions the RWD Sensor as part of the inigition sensor fuse - but all of that is working fine - cannot locate where the RWD fuse is or what fuse box.

Many thanks for any consideration
Answer -
HOW did you determine that the rear defrost is not working ?. Is the indicator light on the control button or on the dash NOT ON ?.

Next would be to check ALL the fuses with a test light.

have you had ANY work done on the car recently ?. ANY ?.

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The indicator light does come on - however, even though the indicator light is on the RWD does not heat to clear off the back window - also on the car the side mirrors are also heated and only work when the RWD is working - these also do not work

I have had no work done on this vehicle (exception of an oil change 1 month ago and 2 new front tires (last week).

Answer
OK, Then I would suggest that you remove the RWD switch and check for battery voltage and amperage draw from BOTH terminals from the switch when it is ON. IF you have no battery voltage on BOTH terminals and or no amperage draw on BOTH terminals, this would indicate an open circuit somewhere in the dash area.

You will need to obtain an electrical schematic to trace the wiring circuitry.



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