Brake lights quit working after pulling a trailer. All other lights work. checked fuse and bulbs. Cant figure out how to remove old switch to replace it.
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If the other brake and turn lights are working the brake light and flasher units are ok . With a test light check at the bulb holder terminal and bulb holder body, test light should glow ,if not check from terminal to a metal part of panel away from the light body . If test light now glows the brake light body has a bad earth if the test still not glowing the power cable to the light is broken.
No there not connected, replace the brake light
1999 Chevrolet Blazer Auto Light Bulb Size Guide Low Beam Headlight Bulb Size: 9006 High Beam Headlamp Light Bulb Size: 9005 Parking Light Bulb Size: 3157 Front Turn Signal Light Bulb Size: 3157 Rear Turn Signal Light Bulb Size: 3057 Tail Light Bulb Size: 3057 Stop Light Bulb Size: 3057 High Mount Stop Light Bulb Size: Assembly Fog/Driving Light Bulb Size: 880 or 881 License Plate Light Bulb Size: 194 Back Up Light Bulb Size: 3156 Front Sidemarker Light Bulb Size: 194 Ash Tray Light Bulb Size: 161 Glove Box Light Bulb Size: 194 Map Light Bulb Size: 168 or 211-2 Step/Courtesy Light Bulb Size: 168 or 211-2 Trunk/Cargo Area Light Bulb Size: 211-2 Under Hood Light Bulb Size: 93 Instrument-General Light Bulb Size: 161 or 37 or PC194 or PC74 Check Engine Indicator Light Bulb Size: PC74 Hi-Beam Indicator Light Bulb Size: PC74 Seat Belt Indicator Light Bulb Size: PC194 Brake Warning Light Bulb Size: PC74 Automatic Transmission Indicator Light Bulb Size: 194 Directional Signal Indicator Light Bulb Size: PC74 As for the horn, inspect the fuse and relay and most common it would be a bad ground wire or worst a bad horn due to corrosion. Horn will be located in the drivers side fender. Thank you for using fixya.
I had this problem on a 1997 Blazer I owned. Turn signals and tail lights all worked, as well as the third brake light lighting up during braking, but not the two main ones. Mine was a bad turn signal switch. They are not cheap, but it did the trick.
Do you have power with a test light in and out of the switch? Do the turn signals work? Will the brake lights work if you play with the turn signal handle?
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