Have a 97 gmc sierra that the brake switch under the dash close to the floorboardmade a rapid clicking ,rattle noise a few times and now my brakelights don't work.the third light has always been iffy.all other lights hazards n all are fine so bulbs are fine.any solutions?

s_pra_army

• 37 Answers
• Posted on May 10, 2009

SOURCE: Brakelights are not working, only the high brake light works

First thing to check is fuses, i know one lamp works, but maybe the two main lamps have their own fuse, doesn't hurt to check.

Getting at the bulbs is easy, open your rear hatch (door) and you will see a few screws holding each rear lamp in place, once all screws are removed the lamp needs to be carefully pulled out, there will be some sort of clip or clips holding it in place, so don't just yank it off, slowly pull on it until loose.

It's a good safety precaution to disconnect your battery just in case. Then to remove the bulb, normally its a quarter or half turn and the bulb comes right out for you to look at. You can use a multimeter, and (with battery connected) turn lights on and see if there is power at the bulb. if there is replace the bulb. if not, then you have other issues; wiring, fuses ... could be many different things.

I hope this helps you. Sometimes you can see the filament in the bulb is broken, but a lot of the time the bulb can look fine but have a broken connection (aka an Open) elsewhere in the bulb. Get a battery and wires, connect them to the bulb, see if you can get light.

Goodluck

joecoolvette

• 5660 Answers
• Posted on May 11, 2009

SOURCE: no brake/hazard lights,have running/turn signal lights

Suggest you change hazard flasher 'can' first, then go to the hazard switch. I'm betting it's the flasher can.

SOURCE: 1997 GMC Sierra p/u. Brake light & blinker out. Lamp & fuse ok.

you probably got the wrong bulb
those are usualy a different number higher wattage, they look exactly like an 1127 but are a 2027 or even a 3027 check the bulb base it has the number printed on it

SOURCE: My 1996 GMC Jimmy right tail light only has

check the conectors in the fender wells

SOURCE: tail lights not working. fuses

do the front marker/park lights work if not you could have a bad light switch on the tail light side of the switch.you need to check the brown wire at the back of the truck in the wiring harness as this is the tail light wire that feeds the bulbs.if you have power there then you will have to check for power at the socket,if no power at the socket but were you check the wire then there is a problem between the two that you will have to check out.if there is no power when checking the wire then you will have to check for lose of power between the switch and rear wiring.make sure the fuse is good by using a test light and not by looking as sometimes they look good but don`t work.

Testimonial: "Thanks a million!!! problem solved, just a simple loose connection at switched saved me $$$$ from taking it to the shop. thanks for the info!!"