On the 89 V6 schematic, I see that the fuel pump is run by 2 coils in the engine control relay. 1 is controlled by the starting circut. The other is controlled by the ECU. Both are run through different fuses. I would check the main fuses & fusibile links near the battery. while working on the engine, something might have contacted ground & blown 1 of them.

Actually check them with an ohmmeter & also wiggle them while having an assistant try starting.

Cycle ALL electrical connections & insure no pins were bent or pushed out of thier sockets. While cycling ALL connectors, use grease to bar future corrosion. Silicone Di-Electric Grease is the best for the application, but regular wheel bearing grease will suffice.

Otherwise, the engine needs a signal from the ECU to sustain the power feed to the "run" coil. For that, a typical ECU takes a distributor and/or alternator signal.

If I remember right, some of the ignition connectors are similar. Unplug them all & make sure the colors match eachother.

I am guessing that you try to start the engine without all of the accessories connected... In that case it could be an alternator signal you are missing.

In the Haynes manual, I am seeing that the alternator is connected to the coil primary. It is also fed through the main charging wire to a fusible link. I would get some heavy duty jumpers to bypass the fusible links to check.

If the battery was not disconnected, or momentarily reconnected the feed wire could have gotten shorted & blown that.... *** My strong opinion *** & then is not feedcing a charge/ignition signal to the coil & then ignition is not feeding ECU to pull coil #2 in engine relay to keep the FP contact engaged.

If you check all of these, PM me & I can figger out a way to bypass & reverse feed them to help diagnose the run issue ***** At your own risk as I am just a hack like you *****


Ed