Tail lights stop working

[Coolio]

Tail light an tag lights stopped working but headlights work. When I disconnect the wiring harness from inside the trunk (coming from taillight) the brown wire has power but when I connect the harness it loses all power. Not sure on the next steps to try. Any advice appreciated.- 84 Monte Carlo ss

 

[pontiacgp]

sounds like it could be a bad bulb

 

[Coolio]

sounds like it could be a bad b

sounds like it could be a bad bulb

I just tried to run the brown wire to the taillight without using the harness and they all came on. Do you know what the other wires in the harness are for? Or should I just run the brown wire without the harness? The light bulbs seems to be good

 

[fleming442]

If power drops from the brown when you plug the harness together, the fuse blew.

 

[fleming442]

They're just turn, brake, and fuel sender. You don't need any of it.

 

[Coolio]

If power drops from the brown when you plug the harness together, the fuse blew.

Just checked again the are good, for some reason once it's connected it lose power but when disconnected it gains power

 

[fleming442]

Just checked again the are good, for some reason once it's connected it lose power but when disconnected it gains power

 

[pontiacgp]

there is something wrong with the connector if you bypassed it and the lights worked...

 

[83StreetMachine]

Check your ground

 

[pontiacgp]

Check your ground

the brake lights use the same ground and those lights are working