Question about Toyota Previa
The rear window defogger does not work even though the defogger switch and relay seem to be working properly
Posted by Anonymous on
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Posted on Jan 02, 2017
the rear passager panel the one that cover the side rear window there a relay connector in there that were the power to window go that defectif that gonna FIXYA our post thank you pierre
Posted on Jul 06, 2008
There are 3 fuses that control the rear defogger, and 1 relay
The fuses are: 10 amp HEATER, 10 amp MIRROR-HEATER; under the dash
The 30 amp DEF fuse is in the fuse box under the hood
The relay is the DEFOGGER relay, which is on the back side of the fuse panel under the dash
Also, check for a loose wire on the defroster grid (on the back glass), this is the most common problem.
Posted on Oct 20, 2008
More than likely something has scratched the film that heats up to do the defrosting, Look to make sure it has both wires attached, and use either a test light (make one out of a 12volt bulb and wire if you do not have one.) See if you have electricity to the wires at the ends. If you do, you have a break in the film. You should be able to see where it is broken or scratched. There is an after market repair kit for this, that is not really expensive.
Posted on Dec 21, 2008
SOURCE: 2002 Alero defogger
A common thing to fial on these- assumning the grid is ok, and wires are still attched to grid, is the rear def / antenna module. It is behind rt. rear quarter trim panel. The modules burn up, and also melt the connector. the module and connector would need to be replaced.
Posted on Jan 04, 2009
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