Question about 1990 Toyota 4Runner

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1997 honda accord - rear window defogger not working

The defoger lite comes on, fuses ok
grid continuity ok
no voltage to grid
can't find relay

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  • big_nag Dec 19, 2008

    Thanks for help but I found the problem.

    It was the switch on the dash even though the lite came on the relay which is located under the dash by fuse panel did not operate.

  • big_nag May 11, 2010

    My problem is with a 1997 honda accord not a toyota, sorry about mix up

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  • 120 Answers

Check the grid ground

Posted on Dec 15, 2008

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1 Answer

Do you have the wiring for the rear defogger?


Did you check voltage and ground at rear defog connector, purple wire should be voltage, black wire is ground. Check to see what your missing, defog turned on. If you have good voltage and ground, then suspect a break in the defog grid. If you can locate the break, the auto store should have some stuff you can paint over the break to allow continuity for the grid.
Also, you should be able to check grid continuity, ohms test. If no continuity, something wrong with grid.
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Defoger relay diagram position on a Honda Accord LX



  • Fuse in the hinge fuse panel.

ironfist109_423.jpg


  • Under hood fuse panel relay
ironfist109_424.jpg


  • You want to make sure to pull the little plastic pieces up by the rear window to check the plug. if the relay and fuse don't fix your problem. Take a multi-meter and set it to 20 VDC and just probe the ends of the connector[s] for proper voltage.


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