> My 92 Classic sputtered to a halt today. I figured I ran out of fuel,
> so I put about a 1/2 gallan in. I haven't been able to start it since.
> I pulled the fuel line at the rail and it is not getting any fuel up
> there. I concluded that it was fuel relay, fuel inertia, or fuel pump.
> I checked the pump w/12volt lamp and ignition on and I am getting no
> light, so it appears that the pump is not getting power. I checked the
> inertia switch and even
> jumped it there, no fuel to rail. i tried the 12v lamp at the inertia
> wires /doesn't light up? I also swapped the identical relays (fuel pump
> relay and ecu relay) under the right seat. No change. I don't notice
> any clicking from under there with ignition on. What are the odds that
> both those relay are done. How do I test those relay? Any ideas about
> any of this would be greatly appreciated.
I haven't got time at the moment to check whether your system is the
same as a 1988 model but the following or something similar may apply.
There were changes for the 1991 model year but I don't yet know what was
There is no electrical supply to the pump unless either the engine is
cranking or the engine is running (determined by air flow through the
flapper valve - assuming that this is the version that you have). A
static test as you seem to describe won't run the pump unless you inject
volts at an appropriate point. There is also the over-run shutoff relay
near the left hand suspension tower.
Assuming that this is not just an empty tank problem (which half a
gallon probably won't cure) poor/broken connections at the last
connection before the pump and at the over-run shutoff relay are not
Do you have a copy of the circuit diagram? I knocked something up for
the earlier model which I'll happily send you if you can confirm a good
e-mail address. I might also be able to find the same for your model
given more time.