1997 850 Brake light not working on left side

gswede · Post by **gswede** » 08 Sep 2014, 06:41

Got the bulb warning coming on when I am on the brakes. Checked and found the left side brakelight bulb was shot. Have now replaced the bulb but it still wont work and I get the same bulb warning.
Brake light works on the right side.

Found two earthpoints just beside the left lamp housing, cleaned them but no fix.

Anyone encountered this?

Post by **Ozark Lee** » 08 Sep 2014, 07:41

How is the socket itself? You may need to scrape the tab and bend it up a bit in order to get a clean connection.

...Lee

gswede · Post by **gswede** » 08 Sep 2014, 07:54

Cleaned the bulb holder sockets including the connectors. Also cleaned the relay connectors. All lights apart from the left brake light works as normal. Fuses looked fine but put in new ones, no fix yet.

Post by **regent** » 08 Sep 2014, 08:17

I would first determine if I am losing the +12 volts or the ground and go from there.
A test light or a meter (better yet) would work better than random component or point checks.

gswede · Post by **gswede** » 08 Sep 2014, 08:33

I do have a voltmeter and wiring diagram, still cant figure where to start testing. Wiring diagram wasnt much help..

Post by **Ozark Lee** » 08 Sep 2014, 09:29

Test it at the socket. If there is no voltage there you may have a problem with the connector on the lamp failure module. The module is typically a blue plastic box that is under the carpet in the trunk on the left hand side on a sedan or under the carpet and a panel on the left hand side on a wagon.

In both cases it is in the cavity to the left of the spare tire well.

...Lee

gswede · Post by **gswede** » 08 Sep 2014, 10:02

Slightly embarrased, actually had 2 bulbs shot. Changed the brake bulb in the upper bulb holder, behind the speaker and all is good.

Thanks for replying guys.

Post by **abscate** » 08 Sep 2014, 11:51

You are the first one to ever do this.....this week.

Thanks for the follow-up post, that would be easy to overlook.

Post by **xHeart** » 13 Apr 2015, 10:09

Ozark Lee wrote:Test it at the socket. If there is no voltage there you may have a problem with the connector on the lamp failure module. The module is typically a blue plastic box that is under the carpet in the trunk on the left hand side on a sedan or under the carpet and a panel on the left hand side on a wagon.

In both cases it is in the cavity to the left of the spare tire well.

...Lee

It is more than a week now, bulb is not the issue.
My next step is to test the socket.

I haven't look for the module, blue box.
Is this a fuse, likely pN?