Topic: 1978 Headlight Wiring with Diagram

[Freakkiller]

I am changing my front lights to H4 bulbs.  This will require relays, so I mapped my lighting out in color.  I used the original factory diagram, and changed it to the 1978 Trans AM.  I was surprised to find out that all the power cones in on one wire, and all grounds are interconnected.  Hope this helps some one.

Freak / Marcus

[Transatrom]

I just pulled my radiator core out and got to witness the grounds that had to be removed to pull the wiring harness.

[Wallington]

Be aware that on HEI conversions you normally have to rotate the wire location to the headlight plug over the older stock plugs.