Brake Light Problem!
My rear brake light works fine with my headlights lights off, but at night when I turn on my lights (1 or 2 clicks) the brake lights are always on! So when I brake it doesn't change.
I noticed that when the headlights lights are off the brake lights don't light up as bright as when they are when the headlights lights.
Anybody deal with this problem before? It's been like this for a little over a year now and it bugs me when I drive at night and people can't tell that I'm braking.
Any input would help. Thanks
Modified by PRoJecTSLeePaLoT at 7:47 PM 6/7/2007
I noticed that when the headlights lights are off the brake lights don't light up as bright as when they are when the headlights lights.
Anybody deal with this problem before? It's been like this for a little over a year now and it bugs me when I drive at night and people can't tell that I'm braking.
Any input would help. Thanks
Modified by PRoJecTSLeePaLoT at 7:47 PM 6/7/2007
Joined: Jan 2002
Posts: 29,948
Likes: 59
From: Nowhere and Everywhere
What is happening is that somehow the 2 filaments in the bulb are working opposite of how they should be. The taillight filament (5-watt) is coming on with the brakes, and the brake light filament (21-watt) is coming on with your parking lights. When the high filament comes on with your taillights, you just can't see the low filament coming on with the brake lights because the high filament drowns out the low one.
Now they only way I can think of that happening is either you put the bulbs in backwards, or the wires in the main chassis harness or in the taillight sub-harness got swapped around. However, 1157 bulbs usually have little nubs on the bulb base that match slots in the socket, so you shouldn't have been able to install them backwards unless you forced them in.
Do you have the original taillights on your car, or have you replaced them with different lights? If you replaced them, did they come with the taillight sub-harness on there already or did you swap over the sub-harness from the old lights to the new lights?
Now they only way I can think of that happening is either you put the bulbs in backwards, or the wires in the main chassis harness or in the taillight sub-harness got swapped around. However, 1157 bulbs usually have little nubs on the bulb base that match slots in the socket, so you shouldn't have been able to install them backwards unless you forced them in.
Do you have the original taillights on your car, or have you replaced them with different lights? If you replaced them, did they come with the taillight sub-harness on there already or did you swap over the sub-harness from the old lights to the new lights?
It's not the original taillights. I swapped the stock 95 taillights out for 98+ taillights. I believe all the harnesses were from the original one so basically I just removed the taillight and put the new ones in.
Joined: Jan 2002
Posts: 29,948
Likes: 59
From: Nowhere and Everywhere
What you need to do is use a multi-meter to check which wires from the chassis harness get voltage for the tail lights and for the brake lights, look at the wires' positions in the harness plug, then trace each wire in the sub-harness to each bulb socket and see if they are in the right place. You might need to de-pin the wires in the sub-harness plug and swap them around.
Or you could try turning the bulbs around 180 degrees in their sockets.
Or you could try turning the bulbs around 180 degrees in their sockets.
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