'88 244 GL, n/a, 300k miles.

My son's car died on the road. After we towed it home I started troubleshooting and ruled out many items. I am now stuck.

It has spark, air & compression but NO FUEL PRESSURE. Aha, says I, Fuel Pump relay.
The relay's board looked like some water found its way in and corroded the solder side so I resoldered and tested it in another car. Works fine. Replaced it in the 240 and still no start. Checked fuses and all look good so I test w/meter and get good continuity from fuses and test for voltage on both sides of fuse. Again, everything checks out OK.

So I then suspect fuel pumps and test them. They both work. I replace FPR with known good relay, no start. Try both relays in 940, both work.

Replace relay into sedan and see there is NO CONTACT ACTIVITY when I turn on keys. I disconnect fuel line so there is no pressure in the line but there is still no activity in the relay (the contacts do not move). I try with key in both START and ON positions, engine cranks but no fuel flow.

I now check the wiring diagram (Don't have an '88 diagram, just an '86 but I presume the basics are the same) and start to measure voltage on wires at the relay. Something is weird. FPR connector 30 (+12v constant, red wire to fuse block) shows +12V when key is in OFF position but drops to +0V when key is turned to ON (diagram shows no connection points related to the IGN SWITCH on this wire, it goes straight to the hot section of the fuse panel then straight to a connector and then the battery). At the same time, there is no change at the fuse panel, still +12V. Was there a diagram change between '86 and '88? Or is this a symptom of my problem? I just do not understand why there would be voltage when the key is OFF but not when it is ON. Additionally, with the key OFF, there is no voltage at FPR connector 85 (red wire on diagram, red/blk in car) but there is +12V when key is ON so control voltage seems to be getting to the relay but not energizing it.

What am I missing here? I'm thinking bad ground but, so far, haven't found where it is supposed to be. My diagram says ground is FPR connector 11 but my relay doesn't have 11, just 87/1, 87/2, 86/1, 86/2, 85 & 30. I'm not sure which is which. 85 connects to the diode in the relay, thence to coil #2,is this ground? I am thoroughly confused. I think 86/1 & 86/2 are the control signal wires, am I right?

You'd never know I used to draft circuit diagrams in a previous life.

Any help appreciated.
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Bob K