hellooooooooooo guys......

right, think i have traced my problem to a faulty abs ecu which sits on the drivers side footwell area. (original fault was the pedal went rock hard and pump stopped working). i have checked all fuses and relays as suggested etc, and cant find any faults. got power going into the ecu but pump not working. the pump will work if powered up seperately so i am thinking ecu knackered.
i have removed it and the part number is 85GG 2C013AD

i can get an ecu on ebay but the number is the same apart from having either AB on the end or AG.

any ideas if these will be ok, or has anyone got one i can purchase or even better try first??? pleeeeeeeease help. its a rs500 if you need to know, but i imagine a 3dr will be ok. thanks

 

the ECU does not control the pump

the pressure switch (5 pin connector) controls the pump relay

check the pump connector, pressure switch connector, pump relay, pump fuse and wiring

don't waste money on an ECU

 

where is the pressure switch and connector located??. cheers

 

as far as i know, the pump relay is the one of the relays behind the kick panel on drivers side??
i havent got power to the pump connector

 

The pressure switch 5 pin connector is above the ABS pump.

You're looking for a green and a purple relay together under the dash, along with 2 fuses. The purple relay is for the pump. The fuse should be 30A.

 

thanks jon. will have a look tomorrow when i dont feel like smashing it to bits!! lol
there could be a cheap rs500 coming up in a bit!! lol

 

ok. cheers jon for all your help. seems to be the pressure switch. next question.............
where the fook do i get one....lol????

 

Do a better test of the wiring first before condemning the switch :

1. Pull back the boot of the pressure switch to expose the wiring so you can identify the colours.

2. Using a short piece of wire, join the brown/black and brown wires. This simulates the operation of the pressure switch, which closes the contact between these 2 terminals.

If the pump works, then it would seem to indicate that the pressure switch has indeed had it. If the pump doesn't work, then it isn't the switch, but something else.

 

As said don't waste the money on ECU, there normally reliable, more likely something simple like a dirty/wiring problem that has occured or at worst the switch.

Martin