I recently had a battery problem that resulted in a malfunction to my security locking module (results were NO TAIL LIGHTS, AND TRUNK OPEN ALERT) although, the brake lights worked.
Replaced the module and everything was fine for about two weeks.
Now I have one brake light (right) that's not working and my trunk only opens with the key, neither the button or remote will open it. The brake/tail light bulb is new.
Tail lights are fine, turn signal works. Just no brake light on that side.
Strangely, I went to try the trunk again, and the button and remote worked....once. And then stopped working again.
Should I pull the SLM and reinstall?? Or any other thoughts?
Many thanks to all.

 

Common problem is the wiring loom by the hinge, you may well have a faulty wire within that loom.

 

Thank you for your extremely quick response Jim! I'll take a look at that for sure.

 

Okay, went and jacked around with the wiring, pulled some fuses just to check, and the trunk is now working fine. So now all I have is the rear build fail warning and no right brake light (tail light is fine). Any idea which color of the several wires would that be? Also hearing a pretty loud "click" from under the center console when I depress the brake pedal. Normal?
Thank you!

 

The click is the release solenoid for the gear shift, normal. If you have the correct bulb run a temporary ground to the brake light and then see if it works.

 

Good to know about the click. Okay, so would I run the ground and just touch it to the outside of the plugged in bulb? Sorry, not sure exactly what to do here. I can do the ground wire just don't know where to run it to....?

 

If you look at the brake light you should see a black wire, that is the ground. Run your temporary wire from that side of the bulb to a ground point on the car.

If the light then works you have break in the original ground wire.

You can then leave the temporary wire in place until you get the original repaired.

 

The power line to the brake light is the red/white wire.

 

Okay, sounds like a plan. Can't thank you enough Jim! Back to football!
Scott

 

I received you reply on the red/white wire afte my last reply. Here is a pic of the housing. I am assuming you are referring to these black/red-white wires?

 

Yep. The red/white wire is the power line and the black is the ground. The ground looks to have a bit corrosion in there, could be the photo.

You will find the grounds are all ganged together through the board so you will need to dismantle one step further to see it and get to the ground side of the lamp base.

Before you do that, try cleaning the lamp base to ensure you have a good connection.

 

Well Jim, I've tried everything, and to no avail. Could it possibly be something in the SLM? I thought I'd ask prior to removing it and checking.

 

Hi Scot, firstly I gave you the wrong coloured wire for the power line, it is the blue and white one not the red and white, sorry.

Before you take anything else apart. Using a volt meter on volts, place one lead to the blue and white and the other to the car body and then get someone to press the brake pedal.
If you get 12v then your problem is the lamp or lampholder or the ground.

If you don't get 12v then the problem is either a broken power line or with the module itself.
To check the line, disconnect at the module and cluster and with the meter now switched to ohms place the test leads at either end of the blue and white wire and if it is good you should see a reading of around 0.1 - 0.3 ohms.

If all the above check out then your problem will be in the module.

Let me know how you get on.

 

Will so, and I'll get back. Thank you so much Jim!