Brake/Hazard Problem
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Brake/Hazard Problem
Items installed are JW HID Headlights. LED switchback blinkers. HID fogs. LED Halo tails.
Headlights high/low, tail lights, running lights, and fog lights are fine. All blinkers are fine.
My two right and left brake lights do not work. My third brake light DOES work. I have no hazards at all.
I recently had the dash out. Can the hazard not being plugged in cause a problem? Fuse 8 and 15 in the foot well are fine.
From my understanding the stalk won't be the culprit with a functioning third brake light.
Thoughts?
Headlights high/low, tail lights, running lights, and fog lights are fine. All blinkers are fine.
My two right and left brake lights do not work. My third brake light DOES work. I have no hazards at all.
I recently had the dash out. Can the hazard not being plugged in cause a problem? Fuse 8 and 15 in the foot well are fine.
From my understanding the stalk won't be the culprit with a functioning third brake light.
Thoughts?
Race Director
Joined: Apr 2007
Posts: 11,152
Likes: 890
From: South Western Ontario
The wire from the brake switch splits. One split goes right to the third brake light and the other split goes to the hazard where it passes through a contact inside before going to the turn signal switch. So, yes, having the hazard unplugged or the contact inside failing will cause that problem.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
If your blinkers work, then your Hazard switch would have to be plugged in (of course you could have corrupted the brake light input or output). I would guess it is related to your LED install. I assume everything worked fine until you did these modifications? I would bet that you get 12V input for the rear brake lights if you tested it. Very typical type of issue after people do LED mods. However, if everything worked fine before you did the dash work then I need to know that so I can consider what the issue might be like what I said above.
PS: Here is the schematic for the 4 rear brake lights. The Dark Green and Yellow wires from the Multifunction switch feed the brake lights (which are also the turn signals)
PS: Here is the schematic for the 4 rear brake lights. The Dark Green and Yellow wires from the Multifunction switch feed the brake lights (which are also the turn signals)
Last edited by dadaroo; Jan 19, 2014 at 08:48 AM.
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,130
Likes: 3
From: Winter Park FL
Brake lights worked fine for about a year after the LED install. The brake lights stopped working after the cage install and the dashboard being out.
Also, along with the brake lights being out I have no hazards too.
Also, along with the brake lights being out I have no hazards too.
Last edited by nickolbag; Jan 19, 2014 at 01:03 PM.
Instructor
Joined: Dec 2013
Posts: 106
Likes: 7
From: Chandler AZ
Right Brake Light(s) probelm, turn signal OK, Active handling prob -Multifunction sw?
Thanks for the update here. I have a 2004 C5. Right brak lights not working, turn signal OK, and electrical cable appears ok. have you heard of multifunction switch problem? Doug
If your blinkers work, then your Hazard switch would have to be plugged in (of course you could have corrupted the brake light input or output). I would guess it is related to your LED install. I assume everything worked fine until you did these modifications? I would bet that you get 12V input for the rear brake lights if you tested it. Very typical type of issue after people do LED mods. However, if everything worked fine before you did the dash work then I need to know that so I can consider what the issue might be like what I said above.
PS: Here is the schematic for the 4 rear brake lights. The Dark Green and Yellow wires from the Multifunction switch feed the brake lights (which are also the turn signals)
PS: Here is the schematic for the 4 rear brake lights. The Dark Green and Yellow wires from the Multifunction switch feed the brake lights (which are also the turn signals)
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Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
From my understanding the stalk won't be the culprit with a functioning third brake light.
Thoughts?[/QUOTE]
Just saw your comment, I overlooked it before. The 3rd brake light circuit DOES NOT go thru the Multifunction switch. It goes directly from the brake petal switch to the light.
Thoughts?[/QUOTE]
Just saw your comment, I overlooked it before. The 3rd brake light circuit DOES NOT go thru the Multifunction switch. It goes directly from the brake petal switch to the light.