No power to gauge
I have an Audi S4 and I wired it up as I told through my tuner and I am getting power to the 4 pin connector but no power to gauge. The only wires that arent hooked up in the ECU harness is the orange, yellow and black wires. This is how I was instructed to hook it up:
HFS3 Red - Injector Power - Thick BLUE/BLK wire (or BLACK/BLUE), Check at any injector
HFS3 Green - Injector Duty - BROWN/GRN (I believe this is the only injector wire that isn't the same color as something else), Check at INJ #4 (DS Front)
HFS3 Blue - MAP - BLUE/GRAY - Check at MAP Sensor
For the failsafe:
BLUE/GREEN - N75 Signal - Check at N75 -CUT THIS WIRE-
HFS3 White - The ECU side of the CUT BLUE/GREEN wire
HFS3 Brown - N75 side of the CUT BLUE/GREEN wire.
HFS3 PINK, YELLOW, BLACK - UNUSED
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The 4 pin connector gets wired at the fuse block under the dash
4PIN RED - Keyed Power - First terminal towards the door "75X"
4PIN WHITE & BLACK - Grounds - There are two factory ground points directly above the kick panel near the hood latch. You can connect these two together there.
4PIN - PURPLE - Dimmer - I don't hook this up but if you wanted to its somewhere in the headlight switch harness
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