1988 740 turbo wiring diagram

  • Thread starter Thread starter strib1356
  • Start date Start date
S

strib1356

My 88 740 is not getting power to the fuel pump and I don't know where the relay is for the pump. I would like to know the location of the relay and if there iw womething else I should be looking for. [email protected]
Thanks
 
The only relay I am familiar with on my 1987 740 GLE is located behind
the fuse panel, under the radio. Remove the ashtray and you'll see the
fuse panel. There should be a screw on the left that allows you to
remove the fuse panel and then slide out the relay panel. The fuel pump
relay I think is on the left rear, and is white and square.

This is all from memory of reading other posts. I bought one on eBay
for $15 to have a spare and plan on replacing mine soon as a
precaution.

You can carefully remove the white cover and inspect for cracks and
resolder if necessary. I would suggest ordering the $15 deal on ebay.

Again, I am not near my vehicle, but this is my recollection.
 
strib1356 said:
My 88 740 is not getting power to the fuel pump and I don't know where the
relay is for the pump. I would like to know the location of the relay and
if there iw womething else I should be looking for. [email protected]
Thanks.
Click to expand...
While on the subject, a long shot but easy to check:
Feel the wires where they come out of the clamp on the positive post of the
battery. The smaller red, brown or orange wire carries 12 volts to the ECU.
If it corrodes in two - as sometimes happens - the fuel pump relay won't get
power. If the wire survives a gentle tug you're okay, but if it falls apart
when you touch it you may well have found the problem. (It took me a whole
weekend to find it on mine, because the corrosion carried enough current to
produce voltage at the ECU.)

Mike
 
You must log in or register to reply here.
Back
Top