Low_Five: you are placing the emphasis the wrong way around "PCM to ground"
the emphasis should be: "PCM to ground"
It's the grounding screw right next to the computer.
It's a common cause of fuel pump relay (and for that matter the EEC power relay) malfunction.
One thing that is often misunderstood is that EEC-IV does most of it's switching
on the ground side of each circuit, so if the PCM grounds are questionable not
much of anything will work correctly or reliably.
AD
Being the inside cab's metal panel is painted that the PCM's ground wire is suppose to be grounded to.
It must only be grounded through this small type screw's threads and the underside of this screw's head that contacts the PCM's ground wire terminal end, as this metal panel is painted where the ground wire terminal end makes contact contact with this metal panel.
This doesn't seem like a very reliable way to make a good ground, if the threads on the screw, or the threads in the metal panel aren't making good contact from rust, or any moisture.
Would it be better to scrape all of the paint off this PCM's grounding mounting area, down to the bare metal, before screwing the PCM's grounding wire to this metal panel for making a more reliable ground contact surface?
Could a Code - 95 Fuel pump secondary circuit failure - PCM to ground, be caused by a malfunctiong fuel pump relay, too?
Is the Code - 95 Fuel pump secondary circuit failure - PCM to ground, affecting both the primary and secondary, in tank, fuel pump's operation and possibly the fuel injectors, too? Besides, maybe, affecting the PCM's ability to function properly for maintaining reliable engine management from it's sensors, if the PCM isn't receiving a good ground?
Is it possible to replace the low pressure secondary, in tank, fuel pump and fuel sending unit, with a high pessure fuel pump and sending unit that will fit in the fuel tank of a 87 Ranger 4x4, STX, without having to make any modifications?
Will a fuel pump and sending unit from a 89 to 92 Ranger or Bronco 2, work for doing this?