Alright, on my 77 C-10 stepside the wires for the guages and choke were cut (prior to me) short and never hooked up in the five years that I've had it.
I simply just added guages and got a manual choke carb.
Recently I got a great deal on a holley spreadbore 650 with a electric choke. Can't beat free!! unless somebody gave you money to take it!!!
I found the three wires that had been tucked away in the harness so long ago and took a test light to them.
Green - coolant
Blue - oil
Tan - ???
They all read positive, but I need to know which one actually goes to the electric choke.
Thinkin about goin to the parts store for the coolant and oil sensors as well to get rid of the add on guages. I should have done this stuff years ago
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