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I had to clip some wires to get this harness out last summer and now dont remember what these two go to.
Would be G, and H on the ALDL. Red and white respectively.
What are they?
My best guess is G is keyed 12v, and H is a tach signal. Not sure if that is correct though.
Thanks,
Jim
If anybody has a pinout chart for the ALDL I wouldnt mind seeing that also. I know which is ground and ......................
Never mind just found it in a shop manual.
Jim
GM 12 Pin ALDL
A - Ground
B - ALDL Test Terminal
C - Air Injection
E - Serial Data 160 baud
F - TCC
G - Fuel Pump
H - Brake Sense Speed Input
M - Serial Data 8192 baud