dim tail lights

[thunderbolt]

This is my second 1970 Road Runner , both with the same issue tail light dim , brake lights brighter but dim as well , grounds are good and the 12 volt feed is good any suggestions

 

[PurpleBeeper]

On my 70, I’ve run an independent ground wire to each tail light socket and they are noticeably brighter

 

[Ron H]

Did the same, I think I had lost some grounding after painting and restoring the tail light assemblies despite some cleaning of primer and paint. Also installed LED bulbs.

 

[MWbirdLOVER70]

This is my second 1970 Road Runner , both with the same issue tail light dim , brake lights brighter but dim as well , grounds are good and the 12 volt feed is good any suggestions

I run a “Y” split wire to each housing and ground independently

 

[thunderbolt]

will try the seprate grounds

 

[bobsgtx]

My easy way to check grounds. I take my 30' test lead hooked to battery neg. and DVOM neg. and touch the pos. lead to the socket of the bulb holder. On DC Volts with light on it should read zero or close to. You can do this on many components. Voltage Drop Tests works with circuit on and loaded.

 

[Richard Cranium]

I run a “Y” split wire to each housing and ground independently

I eat at the Y.

 

[MWbirdLOVER70]

I eat at the Y.

Oh boy here we go lol