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Ask Jared D Your Own Question
Jared D
Jared D, ASE Certified Technician
Category: Pontiac
Satisfied Customers: 1597
Experience:  Shop Supervisor at County Fleet
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I have no brake lights on the main light fixtures. The upper

Customer Question

I have no brake lights on the main light fixtures . The upper brake light on the trunk hatch works, The fuses checked out goo d
JA: Have you checked the brake fluid? How's the level and when was it last changed?
Customer: if it was low brake fluid, the top light would not work , would it?
JA: What is the model/year of your Pontiac?
Customer: 20009
JA: What year is your Pontiac?
Customer: 09
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: yes, all the fuses tested good, I need to know which relay under the hood is for the brake lights
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 2 months ago.
Category: Pontiac
Expert:  Jared D replied 2 months ago.

Hi,

Sorry about the robot assistant. She see's the word "brake" and starts running the script for brake fluid.

What model is your pontiac?

Customer: replied 2 months ago.
09
Customer: replied 2 months ago.
I checked the bulbs on one side of the car and they look good . So I figure bulbs is not the prob
Customer: replied 2 months ago.
is there a relay in the box under the hood that controls the lights ?
Expert:  Jared D replied 2 months ago.

I'm sorry, I need the model.

G3, G6, G5, G8, Montana, Solstice, Torrent, Vibe...?

Customer: replied 2 months ago.
torrent
Customer: replied 2 months ago.
are you still there, it is a torrent
Expert:  Jared D replied 2 months ago.

So you should have a fuse in the underhood fuse box marked Stop lamp. You need a multimeter or a test light to see if you are getting 12 volts to that fuse with the key in the on position and the brake pressed.

Expert:  Jared D replied 2 months ago.

It might be labeled fuse #27 rather than "stop lamp". I can't remember if pontiac labels them with names or numbers in 2009.

Customer: replied 2 months ago.
it is # 27 and it checks out goo, I am not near the car right now so I cant check to power to the fuse. Why is the top light on the trunk hatch working and not the others?
Customer: replied 2 months ago.
I figure the prob cant be the sending unit on the brake pedal or the top one wouldn't work ?
Expert:  Jared D replied 2 months ago.

They both work on the same switch, but because the top light uses LED bulbs it runs straight from the relay and bypasses the fuse.

Expert:  Jared D replied 2 months ago.

From the fuse each light uses a separate positive and wire so if both the left and right are not working then the problem has to be in the fuse or in the printed circuit board from the fuse to the connector under the fuse box.

Customer: replied 2 months ago.
ok, let me get back to the vehicle and see if I can locate the circuit board. So there if no relay envolved? Will there be additional costs if I contact you again this afternoon ?
Customer: replied 2 months ago.
hello ?
Expert:  Jared D replied 2 months ago.

Sorry, we had a fire drill and had to clear the building.

The relay is part of the circuit board. So if you are getting power to the high brake light then the relay is good.

I will be here this evening to check and see if you need additional info.

Expert:  Jared D replied 2 months ago.

Please don't forget to rate so Just Answer knows to pay me for my time.

Let me know if you need additional info.

Thanks!