2001 Gmc Sierra Tail Lights Not Working

Hey guys new to the forum just purchased a 2001 2500hd 8 1 allison 4x4 on saturday.

2001 gmc sierra tail lights not working.

When i checked the wires at the tail light only the wire that worked the turn signals had juice the other 3 did not. Start at the bulb fixtures cleaning and refastening. Connect the light switch to a good ground with a jumper wire and press the brake pedal. When i checked the wires at the tail light only the wire that worked the turn signals had juice the other 3 did not.

Look for cracked broken wires as you go. The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work. I have changed the bulbs fuses checked the tail light circut board checked the headlight switch. Electrical is not my strong point so any help would be.

Electrical is not my strong point so any help would be. Changed bulbs out and did nothing. I have changed the bulbs fuses checked the tail light circut board checked the headlight switch. If the brake light turns on you have to fix the ground connection.

Nov 07 2011 2 38am. Digital multimeter on amazon https amzn to 338al8q 12 volt test light on amazon https amzn to 2pceeuu k1500 replacement taillights on amazon https. The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work. First guess bulb bad but not that lucky.

Rear parking lights dont work 2001 gmc sierra it would then be a bad ground.