Question about Toyota Cars & Trucks
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Posted on Jan 02, 2017
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
SOURCE: rear defogger not working
Easiest way to test it is with a test light, $5-$10 at auto parts store or hardware store. Attach ground clamp to good ground source then lightly/carefully, touch grid close to where connection to it is with point of test light. If it lights, you've got power there, and you need to look for breaks in lines. Might save a lot of looking for something that is o.k.
Posted on Mar 22, 2009
Posted on Nov 08, 2011
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