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  1. #1
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0

    brake lights stay on

    Hello Group,

    I'm a new member/owner so forgive me if I don't follow etiquette. 2003 9-5 aero brake lights remain on when the car is running. I did the following things to try to narrow the problem.

    removed brake light fuse.....no change.....returned fuse
    removed rear running light fuse .....brake and headlights come on only when brake pedal is depressed
    removed headlamp switch......no change....returned switch
    removed and checked all rear lamp bulb filaments(did not check center light)........found differing # bulbs, one with only one filament

    NOTE; the problem started after replacing left rear outside brake light bulb.

    I left the rear running light fuse out so the brake lights work, but when the brake pedal is depressed the headlamps come on too.

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  2. #2
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0
    replaced all the rear bulbs.....no change, any help? ideas? thoughts? good mojo?

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  3. #3
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0
    I noticed that the wires are sooooo thin that I should trace the harness at every crux. Are the thin wires a Saab thing or a GM thing?

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  4. #4
    Dave T.
    Super Moderator Dave T's Avatar
    Join Date
    03 Aug 2010
    Location
    near Seattle, Washington
    Posts
    1,348
    Saab(s)
    1999 9-3SE (2013-2015), 2005 9-3 (2005-2013), 1990 900 (1990-2003)
    Thumbs Up:   26
    I know this is probably not related but around 1993, Saab had a recall for classic 900's where the brake lights stayed on after turning the car off. One could turn off the brake light by tapping on the brake pedal so it bounced back. The recall was to replace the spring with a weaker spring.

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  5. #5
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0
    Thanks Dave, the first think I checked was the brake light switch under the dashboard. I have eliminated that as the problem.

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  6. #6
    Frank
    Administrator
    Join Date
    30 Jul 2010
    Location
    USA - Netherlands
    Posts
    7,782
    Saab(s)
    previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
    Thumbs Up:   109
    Do you have a sedan or wagon? The sedan has a common problem with the trunk wiring.

    http://saabworld.net/f29/sedan-boot-...aab-9-5-a-164/

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  7. #7
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0
    Wulf, thank you for the fantastic response. That is what I was going to check when my son gets home. You know what they say, great minds think alike

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  8. #8
    Saab Fan
    Join Date
    11 Sep 2015
    Location
    Lorain, Ohio
    Posts
    8
    Saab(s)
    2003 9-5 Aero
    Thumbs Up:   0
    Problem fixed, it was the wiring harness in the trunk exactly as pictured in the link posted above by Wulf. 40 minutes with the soldering iron and she's better than new. Thank you for the help.

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  9. #9
    Frank
    Administrator
    Join Date
    30 Jul 2010
    Location
    USA - Netherlands
    Posts
    7,782
    Saab(s)
    previous: 2006 9-3, 2001-06 9-5, 2011 9-4X
    Thumbs Up:   109
    Awesome, glad to hear you were able to fix it yourself.

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