Still 2 unknown wires on combo gauge
 

Still need to know where the all green wire and black with white and green wire connects up to the combo gauge in my "71 914. I think they both hook up to a light for either the brake warning light, volt light, or warning light.:confused:

think you can find that on the schematic page in the haynes manual remember seeing the combo switch on the page .

Buck,
The green wire from your fuel level sensor in the gas tank goes to the terminal on the back of the Combo gauge that has a "G" stamped into the case metal next to the terminal. The black wire also comes from the fuel level sensor and connects to one side of the lamp socket at the bottom of the gauge case that has two red and white wires on the adjacent terminal. This lamp socket holds the "low fuel" indicator lamp.
philinjax