I have a 92 c1500 that has no constant 12v to the power fuse/cab . When applying gas at a certain point electricals and radio flickers off/ back on to wear the engine almost cuts off but when letting off the gas everything goes back to normal even in park. Applying the right pressure if gas keeps the truck running . Looked at the junction box and getting constant 12v to all wires except for the second from the last towards the right. I also tested the power fuse in cabin and it constantly jumps up 12vs and back down to 0volts just like the wire i mentioned earlier in the junction box.
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Would this be connected in any way ?