Fuse question (what is this for? Empty on a schematic)

Matt69olds said:

Found this pic online, you can see the pink pigtail that the power windows would plug into. The circuit breaker bridges the gap. If your truck doesn’t have power windows, they will be a blank spot where the jumper snaps in

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Ok, thanks for that information. I posted a pic at the beginning of this thread but here’s mine again ( although I’ve now switched the 30a to 10).

@Bextreme04 @Ricko1966 I did some late after work snooping, and found at least one issue that is resolved. I had wrongly assumed that the dark green wire that was for the temp sensor was the right one- I need to check if it's on the same circuit via the diagram- but the "electric choke" wire was actually the temperature sensor wire. I peeled back the loom, way back and found that it was also dark green. Grounded it, gauge to hot, no blown fuses. Hooked that wire up to a spare temp sensor since I'd purchased one at one point thinking that was the problem, and since it was cold, I hooked the wire up to that and grounded the temp sensor....gauge back to cold.

So the next task is to find the light blue wire on the diagram that is supposed to be for the choke, it comes off the oil pressure sensor. I don't see it looking back there, but it could be hidden, or maybe it wasn't kept when swapping from the straight six to the SBC. After reading up on why GM did it that way, makes sense that the electric choke doesn't get power until it gets oil pressure, but maybe I'm wrong about that.

That'll be for tomorrow after I'm rested. Off to watch Vice Grip Garage, then hitting the sack.

Chuck yoi are correct choke gets power only with oil pressure.

Found the choke wire now, buried in the loom closer to the alternator. Verified with ohmmeter to oil pressure switch plug. Hopefully home free now. I’m learning that with age, the wires discolor significantly and the “blue” wire is now greenish, so will take that into account going forward.

At least you dad didn't pull the glass fuse out and wrap it with tin fiol! I went to find an Ign to tap into and saw it. I had been driving it that way for over 10yrs since my Dad passed plus however long he drove it too.
I guess being a turbine engeneer doesn't make you good at wiring?

Scribbles said:

At least you dad didn't pull the glass fuse out and wrap it with tin fiol! I went to find an Ign to tap into and saw it. I had been driving it that way for over 10yrs since my Dad passed plus however long he drove it too.
I guess being a turbine engeneer doesn't make you good at wiring?

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My dad absolutely did some sketchy crap. When he gave me the old 3100, I found that he had made his own adapters by taking another adapter, drilling and tapping new holes into it and simply threading new studs into it. Without anything holding them in. Mind you, I rode around in that truck when I was a kid and didn’t die— but easily could have. But I guess he wanted five lug wheels that bad.