The ground should be up in the wiring harness with the bulb sockets. find that harness and you should be able to trace it to the ground
Need to clarify what you mean here. If you're referring to the lights themselves, both of the two bulbs in the top of the tail lamp housing are dual filament bulbs, which serve as parking lights, turn signal lamps, and brake lamps.
Check the brake light switch.
The light switch.
Check the fuse, check the bulbs and check the brake light switch, it should be one of those.
Check bulbs double filamented smaller for turn signals larger for tail and parking lights Check sockets for corrosion Replace turn signal flasher
Be sure the brightness control switch is not turned off, Check the fuse, Check the bulbs.
Check the fuses, check the bulbs but first, be sure the dash light dimmer control is not turned off.
it has a bad turnsignal switch
I don't understand...what's the question? Yes, that's a fairly common bulb size for tail lights or backup lights in late 90s and on autos. I have the same bulbs in my wife's Chevy S10 Blazer. Wagner 12V 3057 bulb. I don't understand...what's the question? Yes, that's a fairly common bulb size for tail lights or backup lights in late 90s and on autos. I have the same bulbs in my wife's Chevy S10 Blazer. Wagner 12V 3057 bulb.
The 2002 Chevrolet Blazer has separate low, high and fog light lamps...total of 6 if you have the fog lights. See sources and related links below for more bulb information.
Make sure parking/tail lights are working - if not, may be a fuse If parking/tail are working - may be bulbs or switch
Fuse, wiring, bulbs