This is a strange one, hoping someone knows a secret.
I recently removed my battery holder from the engine bay and fabricated an extruded aluminum battery box, which I mounted under the passenger floorboard area. Ran new battery cables, terminal blocks, kill switch, etc. Essentially, all battery cables new (battery +/- to terminal blocks, jump to kill switch, to starter, to engine ground, and to a ground lug I installed in the engine compartment. All 6ga, all new terminals, all quality parts.
During this process, I also decided I'm going to fix my headlights (replace w/ vintage-looking LEDs), replace my bed & rear lamps, and repair my turn signals. My lights rarely worked right, I kept blowing high beams, and I didn't want to purchase new stuff w/o new wiring.
So, I removed all under-dash & in-cab OEM wiring, plus the engine bay harnesses (it had all been hacked & spliced too many times, w/ varying wire gauges and colors, to make sense of anything without continuity testing each end point).
Tracing wires through a spaghetti mess was driving me nuts.
I have not installed my new fuse box yet. Outside of the battery cables, I think I only have three wires hooked up in the entire truck - one from ignition switch to the starter solenoid, one to the coil from the starter, and one from the voltage regulator to the ignition switch.
My freeway speed was reduced from ~60 MPH to a top speed of 47 MPH.
Could this be due to one of the mystery resistor wires? Any other guesses?
