Mechanics

WHY THE BRAKE LIGHTS GO PERMANENTLY ON WHEN JUST THE LIGHT SWITCH ON?

1996 Toyota Corolla

The brake pedal switch is working right as well as the light switch. If I take the "stop" fuse out, the brake lights still remain on but if I put it back and take the "tail" fuse out instead, the brake lights work as they are supposed to but then I don't have tail lights. I guess because I'm not good at electrical circuits and/or reading blueprints, I can't figure out what's going on. Please help !. Thank you.
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Landoros
January 11, 2012.




Did you change the brake switch or anything else when this started to occur?

Tiny
Fixitmr
Jan 11, 2012.
No, I didn't change anything. Weeks before, the clockspring got broken so the car was without cruise control, horn and air bags.
I already replaced the clokspring so those three functions are normal now but the brake lights are still on.
Even thou I knew the brake light switch was good, two days ago I boguht a new one just to be sure and sure enough it was to no avail cause the lights were still on, so I returned the switch and put back the old one.
The way it works when I pull the "tail" fuse out doesn't give you a hint or a clue about what's going on?

Tiny
Landoros
Jan 11, 2012.
Somebody out there. Any answers. Any HELP!
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Tiny
Landoros
Jan 11, 2012.
You sure it is the brake lights that is staying on or is it the taillight that is not turnng off?

Check for a bad ground wire at taillight and a faulty taillight relay or switch.

KHLow2008
Jan 11, 2012.
Did you do CS repair before this tail light issue came up? Obviously the signal for tail light is bleeding into brake light circuit. So the question is where is this occurring and what caused it. If the turn signals use same bulb as brakes the column work could have something to do with it.

Tiny
Fixitmr
Jan 11, 2012.
For KHLow2008: I'm absolutely positive, 200% sure it is the brake light always ON when the light switch is on, if I turn the light switch off, everything goes off but the brake lights doesn't have to turn ON just because I turn the light switch ON.
Is there any tail light relay, where is it located in a Toyota Corolla 1996?

For fixitmr: As I said in the beginning, I repaired the CS way after the BRAKE light issue came up. The turn signals don't use the same bulb with the brakes. The brake bulbs are the same as the tail lights (two filaments, one for tail light and two for brakes.
I have noticed that this malfunction is turning on and off on itself. Sometimes it starts after applying the brakes, another times just by turning the light switch ON and also sometimes turns off whenever it wants. I guess what you said: "obviously the signal for tail light is bleeding into brake light circuit. So the question is where is this occurring and what caused it." Is the million dollar question but I have no clue as to where it's occurring or what caused it. It's really crazy, please help, I already got a warning from a cop.

Tiny
Landoros
Jan 11, 2012.
Actually I shoulda asked if brake and tailight bulb are same bulb! My thinking was backwards associating column work with possible bulb conflict.

Tiny
Fixitmr
Jan 12, 2012.
Another thing, when this happens take a bulb out and check for continuity between the 2 contacts. If there is then that confirms source of crossover juice.

Tiny
Fixitmr
Jan 12, 2012.
Could be a screw got put thru the harness somewhere and finally made short.

Tiny
Fixitmr
Jan 12, 2012.
Sorry, do you mean continuity between the 2 contacts of the socket. How must this check be done?

Tiny
Landoros
Jan 12, 2012.

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