Skip the auto shop - Our mechanics make house calls

Q: Push button does not light up. All fuses are good good.

asked by on

My rear defroster is malfunction. All the fuses are good. The button switch does not light up.

My car has 100000 miles.
My car has an automatic transmission.

A: In addition to the fuse, there is also a re...

In addition to the fuse, there is also a relay for the rear defroster to make sure it is working properly (swap the front defroster relay for the rear one if the front is working properly as a check). If you’re getting power to the heater mesh which is "On" the surface of the glass, not inside the layers, most likely the mesh has been damaged.

It is silk-screened on there and damage from window-tint removal, or most any sharp object, can create an open circuit - and it will no longer function.

I recommend having a qualified professional inspect the relevant electrical systems so that this can be repaired properly.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Car shut down and won't start

Unfortunately, what you describe doesn't sound good. My guess is that the noise you heard was a rod bearing, or other failed internal engine part. Continuing to drive the vehicle in that condition likely caused your engine to seize, which...

Q: How Does the Front Defroster Work in a Car?

Selecting the front defroster mode directs warm air up through the ducts at the base of the windshield in order to clear moisture in warm weather or frost in colder temperatures. In cold weather, the defroster becomes more effective after...

Q: No start

You need to check for battery voltage on the red wire to the coil with the key in the on position and then check the same wire when you go to the crank position. If either one is not as...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...