Rear Defroster Not Working
#1
Driver School Candidate
Thread Starter
Rear Defroster Not Working
Hi
I have a 2010 ES 350 I purchased used a while back. This morning I had left the car out (ungaraged) for the first time. The windows were wet with dew, so I turned on the rear defroster. I drove for a good while, and never did see the moisture begin to disapate at the wires on the grid. The side mirrors did seem to be drying after a short time. The switch on the dash did light when I pressed it. It is my understanding that the mirrors and rear defroster are powered by the same fuse. I suspect that a relay may be in the circuit in addition to the fuse. Since none of the lines in the grid seem to be heating, I don't suspect a break in the grid. Has anyone had this problem and corrected it, or have information on the location of the relay. Any information would be much appreciated!!
Thanks,
Alan
I have a 2010 ES 350 I purchased used a while back. This morning I had left the car out (ungaraged) for the first time. The windows were wet with dew, so I turned on the rear defroster. I drove for a good while, and never did see the moisture begin to disapate at the wires on the grid. The side mirrors did seem to be drying after a short time. The switch on the dash did light when I pressed it. It is my understanding that the mirrors and rear defroster are powered by the same fuse. I suspect that a relay may be in the circuit in addition to the fuse. Since none of the lines in the grid seem to be heating, I don't suspect a break in the grid. Has anyone had this problem and corrected it, or have information on the location of the relay. Any information would be much appreciated!!
Thanks,
Alan
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Gdelossa (03-15-18)
#3
Driver School Candidate
Thread Starter
Thanks nevernu,
I located the fuse and relay in the fuse panel under the hood. The fuse is actually enclosed in an assembly with several other fuses that I was unsure of how to remove, but the elements were somewhat visible from the side. I pulled the relay, and tested that I had 12v on one of the heavy contacts, and felt that the fuse was probably good. With this all appearing good I turned the rear defogger on and took my tester to the actual window grid. I grounded the tester on the rear door latch and found that I actually did have voltage on the grid on several lines.
Long story short, I was apparently not patient enough. The rear defogger on my Acura TL, and Odyssey just seem to work more quickly. I guess I'll be able to give it a real test when the snow comes. Thanks again, I really appreciated your help.
I located the fuse and relay in the fuse panel under the hood. The fuse is actually enclosed in an assembly with several other fuses that I was unsure of how to remove, but the elements were somewhat visible from the side. I pulled the relay, and tested that I had 12v on one of the heavy contacts, and felt that the fuse was probably good. With this all appearing good I turned the rear defogger on and took my tester to the actual window grid. I grounded the tester on the rear door latch and found that I actually did have voltage on the grid on several lines.
Long story short, I was apparently not patient enough. The rear defogger on my Acura TL, and Odyssey just seem to work more quickly. I guess I'll be able to give it a real test when the snow comes. Thanks again, I really appreciated your help.
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