All the dash lights feed through the reohstat (sp?) in the headlight swich- when working it is brighter clockwise, dimmer counterclockwise. I'm pretty sure it is a white wire with red stripe (on my 73)- but you should check the diagrams here at PP. If you do a search on "improved electrical diagrams" you will come up with some just fantastically easy to understand schematics that are for a 74 i think, but will certainnly greatly enhance your understanding. Find the HL switch, then follow wires untill you see what color is going to instr bulbs. You can bypass the light switch. Just pull off the spade connector and put it on the fuse that the parking lights are on (i think its 5 but you should check 'cause i'm too lazt to do it). There may even be a free male tab to slid it onto.
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