My 1978
Fiber Stream seems to have standard color code.
White = Ground
Green = Running
Lights (Tail
Lights plus Side Marker Lights)
Red = Left Stop / Turn Signal
Brown = Right Stop / Turn Signal
These are the wires that are in the plastic conduit that runs underneath, on the curbside frame rail, from the front to where it enters the closet (Thru the floor). The 1st thing I did after I bought mine was install new tail
light fixtures, with Back-Up
lights. In order to activate my Back-Up lights, I had to fish a new Yellow wire thru the conduit.
Yellow = Back-up.