hi all, car is 85 244 turbo intercooler c.i fuel inj. car came with this wiring modification to the fuel pump relay, i will describe it.
terminal= 31 black wire to overpressure switch unhooked from relay.
terminal= 87a yellow red wire (the larger of the two) has a wire spliced into it and ran to fuse # 7 with a toggle switch in line to shut off power to 87a. each yellow red wires feeds a fuel pump.(per bentleys) i must use toggle every time i start and stop engine.
being no wiring wizard here is what i do. and without a vacume guage and remote r.p.m. guage to test items (per bentleys) i unhook toggle switch power feed from fuse #7 to 87a (the jury rig) and hook up overpressure switch black wire to terminal #31 on fuel pump relay results= everything seems to be fixed, but not for long car runs like do do and blowing black smoke, relay is very very hot. i dont understand terminals 31b 15 or 31 and their purpose. (keep in mind im a plumber good with wrenches bad with wires) i put all wires back like they were to begin with and runs great, cool relay, but back to using toggle=sucks.
i have tried three fuel pump relays from boneyard and also a overpressure switch. can someone help me. i hope this is obvious to someone out there. thanks for everything. its only easy if you know how to do it ;^!
four volvos. 2= 85s, 86, 87,
1990 740 turbo R.I.P.