Another 454 Vortec Build Thread - Documenting, Q&A, Help

[Bachert24]

Need a little help. Driver tail lamp works fine. Passenger not to much. When I flip the connector it lights up but I think they are just getting constant vs switched power. What connector is passenger taillamp? On the image none of what I'm seeing is matching up. Looks right based on drivers side but no switched power.

 

[454cid]

Need a little help. Driver tail lamp works fine. Passenger not to much. When I flip the connector it lights up but I think they are just getting constant vs switched power. What connector is passenger taillamp? On the image none of what I'm seeing is matching up. Looks right based on drivers side but no switched power.

I'm not sure what you're saying. What's the passenger side do when connected correctly? How would you even "flip" the connector?

If it's just not working, it's probably a bad board in the light. It's a terrible design. It was always my passenger side that gave me issues, too.

 

[Bachert24]

I'm not sure what you're saying. What's the passenger side do when connected correctly? How would you even "flip" the connector?

If it's just not working, it's probably a bad board in the light. It's a terrible design. It was always my passenger side that gave me issues, too.

I have aftermarket taillights now. All but the reverse light is LED. With both connectors plugged in drivers works but passenger does not and I see no issues in the wiring. Wondering if the plug got re-pinned wrong or something. I'm just looking for the connector number right now. C406 or something. I plugged both lights into the driver side connector and they both work fine minus the reverse light. Neither of them work. Running lights on both sides work but brake light and turn signal don't work on passenger side. Is it possible it's the turn signal switch itself?

 

[BeXtreme]

I have aftermarket taillights now. All but the reverse light is LED. With both connectors plugged in drivers works but passenger does not and I see no issues in the wiring. Wondering if the plug got re-pinned wrong or something. I'm just looking for the connector number right now. C406 or something. I plugged both lights into the driver side connector and they both work fine minus the reverse light. Neither of them work. Running lights on both sides work but brake light and turn signal don't work on passenger side. Is it possible it's the turn signal switch itself?

Bust out a multimeter and actually check for voltage at the taillight plug. Black is ground for everything, Dk Green is right turn, Yellow is Left turn, Light Green is reverse. If you have power at the taillight connector, but the light isn't working, then you know the light is the issue. There are connectors at the lights, at the bumper before it heads down the drivers side frame rail, and in the engine compartment. If no power at the taillight plug, start working your way forward.

If you don't have a multimeter and don't want to buy one, just get yourself a cheap harbor freight dummy light and do the same thing. Just make sure you are checking through the same ground the light would be using and not direct to a good ground on the chassis.