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Old 06-11-2005, 06:07 PM
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brake lights quit

ok, i have an 84 buick lesabre (hate the freakin thing, but it gets me around)

anyways, the brake lights just will not work, i have replaced the bulbs, fuses, and the brake light switch on the pedal....there is power going to the switch.

what could cause this? is there a relay somewhere?

im guessing broken wire, and if so, im just going to run a wire from the switch to the lights (hack, i know, but i dont really care about this car )
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Old 06-11-2005, 07:10 PM
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Testing

Doc here,

Get a Volt ohm meter, set it for 12 (or better volts ) and put one probe, (black) on ground, The other on any brake light switch terminal..

If you don't have any readings at the terminal Try the other...(If it's a 3 wire, try all 3)...

If you have no power at the switch at all, put your Red probe on the Fuse marked Brake lights, If you HAVE power there, then you have an open wire between the fuse and the switch.

If you have No power at the fuse, check the other blade of the fuse..If you have no power on either side of the fuse, you have a bad Fuse buss, or fuse holder.You'll need to wire an inline fuse holder from the battery to the brake light power wire.

If you ONLY have power on one side of the fuse...you have a blown fuse..

To test the circuit, you can run a jumper from power, to any one of the 2 or 3 terminals on the brake light switch, one will give you lights..all the time, that tells you the harness ET &AL going to the rear is good..The other goes back to the fuse, (the one you will probably need to change) and the 3 rd if you have it will be cruise control, the jumper will have no effect..

Do the turn signals work? The brake Light harness goes through the column and out again for TS operation..your harness could be bad there..or unplugged, or the switch in the column may be shot.

No relays in that system..you should be able to jumper it and heat it up from any point in the harness.

Do you have the CORRECT bulbs in there? incorrect bulbs could give you tail but no brake lights.

You may have to hand over hand the harness to the rear, I think their is a plug under the seat area, you could check there, but I should think you would lose more functions than brake lights.

Doc
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Last edited by docvette; 06-11-2005 at 07:19 PM. Reason: Additional Information
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Old 06-11-2005, 07:11 PM
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no lights

if you have power going through the switch and to the turn signal switch .. the problem is probably a turn signal switch . the power goes through the turn signal switch before it goes to the lights. if you have a way to unplug the switch and plug in another and operate it manualy, this will tell if it is the switch or not..
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Old 06-11-2005, 07:42 PM
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i think you may be onto soemthing......when i turn the left turn signal on, the left side works fine, but the right side doesn't, also, when its in reverse, the right side turn signal indicator on the dash lights up.......


i dont have a volt/ohm meter, but i tested the fuse with a test light, both side has power, i also tested the brake light switch.....

theres power going to the brake light switch, and power going out of it.....

i think im just going to wire it straight to the lights from the BLS, im tired of messing with it........
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Old 06-11-2005, 07:49 PM
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light on dash

check your back up light bulbs . make sure that they are single filament bulbs. a duel filament bub will feed back through the wiring and turn on the dash light.. also make sure that all turn signal bulbs are duel filament bulbs such as a 1157 bulb.
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