Anyone know what these 2 wires are?

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AuroraGirl

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400(?), 350
The fuel tank switch harness on the 1980 trucks(not sure on other years) lives in a separate 4 pin connector near where the throttle cable comes through the firewall.
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Bextreme04

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Yep, that's the one! I pulled the harness when I went to the single Blazer tank and repurposed the pass through for ignition kill switch wiring and electric fan trigger wiring.
 

AuroraGirl

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Northern Wisconsin
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Taylor
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1978, 1980
Truck Model
K10, K25
Engine Size
400(?), 350
Yep, that's the one! I pulled the harness when I went to the single Blazer tank and repurposed the pass through for ignition kill switch wiring and electric fan trigger wiring.
My gpa made a lot of holes with a drill and most appear to have been the same size at hte same time, regardless of wire needs :|
the time comes I put my PS pump up high and my alt, preferably a newer one too, down low on the driver side and I will pull that engine harness up off, remove things not there, route things nicely. Maybe run a couple sensors and wiring even if I dont have gauges and leave them labled for future lol
I want to contain the electrical to the driver side minus the distributor and the choke if all possible. then fix all the dangling **** and attach hold downs and conduit etc.. fortunately most of my wiring is okay, Im guessing most of these modifications came when he stopped daily dreiving and just "**** it" fixed things because he had f150
 

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