Tail lights dont work

is the truck wired for a trailer?wires come loose check plug under bumper,also check fuse for running lights

check fuses also is it manufacture installed or after market installed. if manufacture installed check connections behind the connector. if after market installed check where they spliced wires into the tail light wires behind bumper and any where else that wires could be connected do you have tail lights and brake lights on the suburban send email to [email protected]

Your truck may have had the factory trailer tow package, but that did not come with a wiring connector in that year. There should be a wire harness under the rear of the truck near the center of the bumper with 7 wires of the following colors/characteristics -

Red/Orange - +12V Battery (Thick Wire) From fuse #8 (40A)
Black/Orange - Tail Markers (Thick Wire)
Light Blue - Trailer Brakes (Thick Wire)
Violet/Black - Backup Lights (Thin Wire)
Dark Green/Red - Left Stop/Turn - (Thin Wire)
Brown/Red - Right Stop/Turn - (Thin Wire)
Black - Ground - (Thick Wire)



Under the dash, the brake controller wiring should be -

Red/Orange - +12V Battery (Thick Wire) From fuse #8 (40A)
Black/Orange - Ground - (Thick Wire)
Light Blue - Trailer Brakes (Thick Wire)
White/Tan - Brake Light sense - (Thin Wire)

Hope this helps.

sounds like you may have a wiring problem at the back of the truck right side underneath behind the bumper were the wires travel from the front to the rear of the truck, if you check the wires for damage, broken,green corrosion or rubbed through this is common for these trucks,check all the wiring at the back in these areas.

I believe they had a tail light circut card on trucks and suv 's at rear of vehicle on frame joist near rear bumper it is where left/right and truck harness come together and if memory serves me it is a brown wire which feeds tail lights and of course a black ground wire, if it is a truck/suv you may also see a large (10ga) white wire as a ground used for a trailer connector.

if they camper was wired for an older/other make of truck it might be different check to see if the yellow(left side turn/brake) wire maybe connected or crossed with the green(right turn/brake) wire,also see if the plug in wiring under the rear bumper is a stock plug in or if some one tried to go cheap and use"scotch-locks" on the tail light wires and crossed something under there,the parts store sells a plug in tester for your truck's particular plug that will tell you if the truck has the issue or if it's the camper,also check the ground,hope this helps,and good luck

if tis on the back rear bumper area its a trailer light plus for towing a trailer

its in the engine compartment in the fuse box on the drivers side next to battery

usually the trailer plug isnt wired for backup lights,i guess you will have to wire it manually,check the color of your wire to the backup lights of your truck,locate that wire underneath the back bumper and splice a wire to it to hook to your plug to the trailer.make sure the reverse wire from your trailer matches up with the terminal at your truck

Bad ground....and possibly a bad flasher module........stop lamp fuse........corroded wiring between the cab and the tail lights........If your truck has trailer light wiring check to see that it isn't causing the problem.........most after market kits plug into the main plug under the rear of the truck and over time can corrode and create bad connections
hope this helps....good luck!