Headlight Problem

XIANGSUOLIU1

MEMBER
2002 SUBARU FORESTER
2.5L
4 CYL
AWD
MANUAL
180,000 MILES

When I use the low beam and fog light, the light will sometime be on, then off. Checking the fuse, and relay, everything is OK. Can you tell me why?

Thanks.

Friday, January 16th, 2015 AT 5:16 AM

4 Replies

HMAC300

MECHANIC
48,601 POSTS

Check your multi function switch or a short in the wiring system. Maybe a bad ground is corroded. If you have daytime running lights the module may be interfering with it so have it scanned for codes

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Friday, January 16th, 2015 AT 6:36 AM

XIANGSUOLIU1

MEMBER
5 POSTS

Thanks a lot.
The mufti function switch should be OK for I changed to another one, it still has the same issue. I will check the ground and the wire connection.

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Friday, January 16th, 2015 AT 6:43 AM

PERRY003

MEMBER
1 POST

I am having the same issue with my 2002 Subaru, was the ground the issue and if so how would I go about finding the problem?

Thanks

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Saturday, March 9th, 2019 AT 2:23 PM

KEN L

MASTER CERTIFIED MECHANIC
48,296 POSTS

When the headlight stops working or flicker use a test light to check the power, grounds and relays. here are guides and the headlight wiring diagrams so you can see how to test and system:

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

and

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

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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