One of the common failures of the LH ecu is a hybrid pcb that stops working. A common symptom is not energizing the fuel pump anymore (beside some other problems. Many times the car is flat bedded home. But this is not always necessary. If for whatever reason the fuel pump relay is not activated or is not working, here's my recommendation to bypass the relay and patch the situation ins the safest possible way to get you home.
Be aware: this is not !!!! a safe and proper fix, it is a get-me-home workaround.
It is almost certain that this problem will happen if your LH has never been rebuilt. We offer that LH rebuild service: Diag.htm
- test the relay by swapping it with the horn relay. Look up on your relay chart which that is. If the car starts and the horn does not work anymore you have found a defective relay. It happens.
- If the test still shows a not-running pump it is possibly a broken fuse #42 in a GTS Check your fuse map. You can test the fuse on the green-led fuse tester (part of the Ezk relay)
- if all seems ok, it can still be a broken fuel pump. That is not so easy to check. It takes removing the cover of the pump area i the back, and use a test light to see if power reaches the pump., If so you may have a defective pump.
- last... but neat: take relay (XX at MY 1987, XXVI from 1990 onwards) out,
connect socket terminal 86 with 87. This connects the ignition-key
switched 12v supply from power rail 15 to the pump directly. It does make
perfectly sense to fabricate a little wire with two AMP prongs and put that into
your glove box next to the flashlight and the 12v test light you (should) have