k3000

2000 Firebird, there's three wires to the cig lighter, I think red, yellow, and black.

Wouldn't you need only two there, one power and one ground?

HappySalesman

iTrader: (3)

Factory wiring diagrams only show two wires at both of the cigarette lighter ports. Should be an orange and a black. Red, yellow, and black sound like aftermarket wiring colors, though even with an aftermarket I can't imagine why you'd need three unless it had some sort of built-in illumination.

k3000

Thank you, that's very helpful. It's an aftermarket no cut cig lighter tap.

I may need to take it apart to solve this mystery!

Can you tell if the red and the orange are both hot?

If possible post the schematic for me!

Thank you!

WhiteBird00

iTrader: (4)

I assume you're looking at the universal lighter splice harness you posted about in another thread? That harness uses a connector which is standard across most GM products so HappySalesman is probably right that the extra wire is for those models which had an illuminated ring around the lighter socket. In your case, the two wires you need are the ones connected to pin A (power) and pin C (ground).



A = Battery positive (orange)
B = Unused - probably illumination on some models
C = Ground (black)

k3000

Thank you WhiteBird! Now I don't have to do a forensic disassembly! Lee