Ωhm

Which state is the Brake Switch in, Brake light ON or Brake light OFF?

Is the factory Brake Switch still connected up to the wires? If not, try that.

Any DC motor that isn't spinning is like having a Short to Ground. No spin, no counter-voltage. At motor start up, surge current will climb until motor RPM's increase.

Living in downtown FORD land, I’ve had my fair share of fords. My two Cr Vic (92/99(still my DD)) were my favorites from ford, but the one’s I enjoyed the most were my PONTIAC’s; 1964 GTO (1st_car) & 1970 Grand Prix. Almost forget I had a 1975 CJ7, but that was eaten up by rust.

Fuel pressure when running should be ≈31psi. Priming the pump, engine off, should be at 39psi and hold. Bleeding down is sorta common with faulty check valve. Shouldn't cause RICH condition, unless your leaking fuel off the Fuel Pressure Regulator (FPR) and into the intake manifold.

I myself didn’t know anything about this ‘launch coin’ except that there're pretty cool once I see one here on CC.

Hired in on the Road Stimulator Dyno (LABECO) for mileage accumulation needed for our certification vehicles. AMC also had no test track so we rented time at Michigan International Speedway (MIS). Here we would record vehicle information for our CERT vehicles and then run them back in town on the LABECO’s. Next came Exhaust Emission Instrumentation Group (EEIG). This was strictly the tailpipe measurements needed to pass for vehicle certification. Next move took me to my RENIX years. Joined Engine Electronic Controls (EEC). This move got me off of midnight/afternoon shifts to daytime work, which was the purpose of the move, and I landed on the newly formed team called 4.0L. Actually, they were going to call it a 3.9L due to the high price of fuel at the time.

REM shows the fault, but somewhere in the ECU software, reading will switch over to Air Temperature Sensor (MAT). See NOTE (highlighted in yellow): WARM UP MODE OPEN LOOP.pdf

AMC's Historic Former Detroit Headquarters Is Finally Being Demolished (thedrive.com)

The Cruise/Trans SW electrically is used by the Transmission Control Unit (TCU) for the purpose of disengaging the Torque Converter, when brake pedal is depressed.

I wonder if C308 is C361. Both seem to be the same but keyed differently. C361 is part of the Front Crossbody Harness (FC). You’d need to pinout the harness to make sure its correct. But you don’t have this harness as shown in the Manual (pg92), right?

30A circuit breaker would be external to the fuse box. Once installed (one arrow going to two pins) this would complete the circuit (series) and then PWR ACCY would be HOT with KEY ON. fuses and circuit breakers.pdf

Try mounting the rail w/injectors by themself. Disconnect both fuel lines, or at least the one at the Fuel Pressure Regulator (FPR).

Window Motors are high current circuits. Check IGN SW C267_A. Could have voltage drop at IGN SW. 88 Electrical Manual included. Used for 89's. 88 Electrical Manual _mj1988electricalmanual_1.pdf

Understood.

I was guessing the blue box one as the headlamp delay module.

Headlamp Delay Module. Yes for the Borq Cube relay.

Why did you replace the O2 sensor? Maybe try the other one again.

Camshaft Position Sensor aka SYNC sensor.

Every 30,000 miles. _fuel evaporation system.pdf

Great video. Thanks.