Originally Posted by
RSTurboSI
Got a problem with your fuel relay?...
as you all know that the main problem with the fuel pump is the relay, they decided they no longer fancy the job of running the car and burn out. ok heres a trick to make sure its that before you spend a good 75£ for a new one.
On the escort rs turbo if you get yourself some speaker wire, and use both wires for them remove your rear bumper numberplate light, place that inside the power of conection, so place inside the plug and bring the cable(speak wire) back on its self to your able to re-plug it back on.
Then feed it under the car and to the fuel pump, there should be a wire leeding to the fuel pump colour YELLOW. and do the same, put your side lights on then your fuel pump should prime all the time, fire up the car and you will then know that the relay is FOOKED.
enjoy
all this proves is there was no power getting to the pump... and by using speaker wire it is.... This could be many things other than relay.... it could be a wiring problem on the fuel pump side of the relay... ie broken wire etc... or if you have an alarm which has a fuel pump cut it could be the alarm etc.... A fuel pump draws a lot more power than a number plate bulb... especially if there's a problem with the pump(which may cause relays and wiring to burn out) so by doing you little trick it may damage other curcuits. I personally would bridge the relay(at least that curcuit is protected by the correct ampage fuse and has the correct guage wiring too, if this works pick up a relay on my way home.... or do what i used to do when i had one... and fit the spare relay which is in the glovebox...