td5 no power to fuel pump relay pin 86

hi, my recently purchased 2000 td5 still wont start.batt fully charge/half a tank of fuel, (which may come in usefull later!)
it was diagnosed by the aa as a fuel pump which wouldnt power up, this has now been replaced, but the pump still wouldnt power up.
have checked and changed fuses and relays, all to no avail, checked fuel pump earth continuity, which is ok, checked continuity between pin 87 and fuel pump, and this is ok,
bridged pin 30, and 87, on fp relay, and pump runs.
pin86 on fp relay shows 1.7v, checked continuity between 86, and wire just at back of black plug c658/pin5 blue/purp,(by pushing multimeter probe through wire insulation) which is ok., voltage here reads 1.7 also
disconnected black plug from emcu, and measured voltage on pin5, which is just less than 11v, contacts are clean and grot/oil free, and continuity from plug to measured point at rear of plug used before was ok.
but as soon as i plug it in the voltage measures only 1.7.
q1)am i reading the wiring diagram correctly the fuel pump relay (r1) pin 86 is the switching "power in" pin for the f/p relay from the emcu.
q2)i dont see any heater lights on the dash is this correct
any suggestions of someone in stafford to take the thing to to have it checked would be appreciated (apart from the scrapyard.... for now!)

Q, would a hawkeye diagnostic reader provide any clues, with the engine not running?

1. push the inertia fuel cut off switch in the engine bay just to make sure...eventually check it's wiring, or bypass it cos this one interrupts the pump relay coil's circuit if tripped
2. the fuel pump relay's coil is energised by the main relay(R9) ... and R9 works together with the ECM, not R1

RAVE said:

The main relay is located in the engine compartment fuse box and supplies battery voltage to the following:
l ECM.
l MAF.
l Fuel pump relay.
l Cruise control master switch.
l Cruise control RES switch.
l Cruise control SET+ switch.
It is a 4 pin normally open relay and must be energised to provide voltage to the ECM.
Input/Output
The earth path for the main relay is via a transistor within the ECM. When the earth path is completed, the main relay
energises to supply battery voltage to the ECM. Interrupting this earth path de-energises the main relay, preventing
battery voltage reaching the ECM.
Input to the main relay is via pin 1 of connector C0632, located at the engine compartment fuse box. Output from the
main relay is via fuse 1 to the ECM connector C0658 pins 3, 22 and 27. The earth path is via pin 21 of ECM connector
C0658.

Click to expand...

check this route too

thanks have run continuity check on inertia switch wiring,and also confirmed power to and through it, also tripped it and reset. will try to by pass again. just incase.
thanks for the help

did you fix it Lyndon ??