Skip the auto shop - Our mechanics make house calls

Q: How do I know if the rear defrost module is bad?

asked by on

Rear defrost doesn't work but the light does come on

My car has 11300 miles.
My car has an automatic transmission.

Hi there. If you checked the fuse, defroster switch, main power tabs and the wiring but the defroster still does not work, then It is time to take a look at the relay. The defroster relay is normally located under the dash. Some installations combine the timer and relay in one unit. Jump the relay defroster wires with a jumper wire and if the defroster works then the problem is the relay. Remove the unit and replace it with a new one. If you need further assistance with diagnosing the rear defroster, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 2004 Chevy impala that doesn't move when it's in drive an i step on the gas peddle. Why?

This may be a number of different possibilities, however it sounds like it may be related to a transmission problem. This can happen for a few different reasons such as low transmission fluid or a faulty control solenoid. An automatic...

Q: Cars stalls when the AC is turned on.

A seized AC compressor can stall your engine when you turn on the air or defroster because it sends a signal to engage the clutch on the compressor, which causes more resistance than normal. But there are switches that level...

Q: I had to get my coils and spark plugs change all 6. Mechanic said he had take out engine to get to back plugs. He did this and it

A mechanic would never remove the engine to change the spark plugs on 2004 Hyundai Santa Fe. The largest "part" of the engine that is removed to access and replace the sparks plugs is the plenum, which is simply part...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...