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To my knowledge it is all. I have watched it brake on gravel and all wheels seem to lock up. At least all the back ones. I will run the test again, braking harder, to determine if it is all four wheels.

Thanks everyone for the replies! I have fixed my issue, it ended up being the PMD Harness. I guess it had a short in the wire. I have relocated the PMD and followed any other recommendations provided to me!

I have a 1991 Ford F-350 7.3L Diesel. When the brake pedal is pressed, even slightly pressed, the wheels lock up and skid. When the brake pedal is released, all is fine. This has had me scratching my head for a minute now.

I am located in Halls, Tennessee 38040. I have tried almost everything mentioned and I think it will boil down to the PMD or the IJ Pump. I didn’t think about a plugged return line. I will make sure it it returns fuel. When I get it running, I am probably going to get spare CMD as mentioned...

Ok I will try that tomorrow. When I turn the brass t screw, a tiny constant-stream of fuel comes out when the engine is turned over… should it be more or less?

Also there is a brass t screw near alternator that has something to do with fuel

I have not tried replacing the pmd. The pmd is external, but still mounted in the engine bay with a heat sink. I was going to try to test it, but could not find a good way to do so. I will purchase a new pmd, to try to see if there is any improvement. If not, then might it just be the IJ Pump...

If this is where the return fuel line connects, that you mentioned. I have done so earlier, but forgot to put it in post. It has fuel flowing out. I assumed fuel pressure is good due to the fact I forgot to put the screw back on the fuel filter cap and fuel went everywhere with a lot of force...

1994 Chevy Blazer 6.5 Turbo Diesel, has no fuel to injectors. The vehicle sat up for a while and I took various steps to clean, replace, and inspect parameters, but still no fuel to injectors. 1. I cleaned the tank and filled with fresh diesel, 2. Inspected the Lifter Pump and it is...