quote:Originally posted by goodroc:
Michael, do not confuse the Y/BK 12v(+) for the Instr. Light with the Y coming from the Sensor(-). Your Gauge is supplied with a positive 12v(+) P (Purple) and gets its negative (-) regulated for the level indication by a W/BK and a negative for the low fuel light Y or perhaps in your case a spiraled Y/BK
My Sending unit looks slightly different as it is a combined Sending/Fuel supply..........
Thanks Goodroc - I had figured out the yellow black was the instrument lighting - and also through looking at a gazillion photos and a '74 schematic that the pink in my case (your's is purple) is the "hot" 12V for the instrument supply on the + terminal with the 12 terminal being the lead off to the measuring device be it fuel level or oil pressure.
It's an excellent reminder of my basic DC principles AND instrumentation stuff from back in trade school so I'm kind of actually enjoying it this although it's taking longer than I want it to with work kicking back in for the year...