Defrost switch does not power on and the fuse is not blown

NICHOLE SCOTT

MEMBER
2009 NISSAN VERSA
1.8L
4 CYL
2WD
AUTOMATIC
110,000 MILES

I just had a new rear windshield replace, but my rear defrost was out long before it was smashed. I know my fuses are good. I am not sure about the relay, but I do know the switch inside my dash does not power on. How can I test the switch alone? Thanks.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,959 POSTS

Hello,

Here is a guide and the rear window defogger wiring diagram so you can see where you are losing power at. There is a relay as well that should be checked.Below are the fuse panel and relay locations so you can do some testing.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below).

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

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