Corolla Owners Help! (1 Viewer)

[Scott Van Dyke]

My '94 Corolla's rear defrost stopped working a while ago, and I checked all the fuses inside and outside the cabin to no avail. Has anyone else had this problem? I push the button, and the light comes on, but no heat to the wires. I really don't want to take it in if I don't have to.

Thanks,

 

[jeff lam]

If you have a volt meter, try that out and see if you are getting 12V to the wire and ground with the switch on. At least I'm pretty sure it should read 12v this way.

 

[Scott Bourden]

You can always look for a cut or large scratch on the defroster wires, I believe hardware stores can sell you a kit (relatively cheap) for repairing it, a broken connecting (ala damaged wire) could cause this too.

 

[Steve Schaffer]

Are all the elements dead or just a few?

If it's just a few there are kits for "painting" in a repair at the break.

If it's all of them, use a voltmeter or 12v test light to see if you're getting power and ground at the wires connected at either side.

If not, you may have a bad defroster relay or the circuit breaker may be blown. The switch itself only activates a relay which gets the high current necessary for the defroster from a separate circuit breaker. You will need a copy of the Toyota factory wiring diagram to find where these parts are all located--maybe try the public library or your dealer might let you look at thiers.