Door open light always on

DAVID CARL LONG

MEMBER
2002 FORD FOCUS
2.0L
4 CYL
FWD
AUTOMATIC
138,000 MILES

I have taken a good door closed switch from my 2000 focus and swapped it out with all four doors on the 2002. Interior light comes on. I have checked the trunk, the light is on when opened, off when closed. Even swapped the trunk latch mechanism with my spare. No fix. Removed door panel, no electrics, ( except for speaker wires ), to door latch.

I am a bored IBM retiree and I am fixing up this focus as a project. Lots of fun so far, but this little thing has me awake at night.

6 Replies

HMAC300

MECHANIC
48,601 POSTS

Check the gem module and battery saver relay, although I think it is the gem. that may need to be scanned by a professional to fix and also programmed to your car see this link on how to test it.
https://www.youtube.com/watch?v=AU9rANLtk8Q

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Monday, May 30th, 2016 AT 4:12 PM

DAVID CARL LONG

MEMBER
4 POSTS

Hi, did GEM test, door switch no response, light remains on. However, I found the key-switch does not lock in key ( pulls out easily, ) when engine is on. Also seems pushed in a bit until the key is removed in the off position. Could this be the problem? Any way to repair this without changing switch assembly? Your help is much appreciated!

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Tuesday, May 31st, 2016 AT 2:17 PM

HMAC300

MECHANIC
48,601 POSTS

See pics

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Tuesday, May 31st, 2016 AT 3:21 PM

KEN L

MASTER CERTIFIED MECHANIC
43,262 POSTS

I know this is kind of crazy, but did you check the headlight switch to see if the thumb wheel was stuck on? It could be the headlight switch by pass.

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Wednesday, June 1st, 2016 AT 7:38 AM

DAVID CARL LONG

MEMBER
4 POSTS

Hi Ken, thanks for bearing with me. The thumb wheel seems okay it lowers and intensifies the panel lights etc. As normal. Looked up headlight switch bypass very technical diagrams!