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1

Omega General Help / Re: Omega X25 ABS Lights

« on: 03 January 2008, 10:42:21 »

Hi Kevin,

That is the speed when the fault appears.  Actually the ABS/TC lights blink at that point then stays on.  

THere are only 2 bosch relays inside the black box. Unfortunately, they are welded to the circuit board and not the plug-in type. Would anyone know which relay (front/rear) controls the return pump circuit?  

I live outside the UK where Opels have been orphaned but I love this car too much to give it up.  It's not easy for me to just pack it up and send to BBA Reman.   If I knew which relay it was, i would create another relay socket wired piggyback into the existing relay and then use a plug-in type Bosch relay.  Sounds scary but it might work.   Now if I only knew which relay was giving me problems.   :-?

Thanks everyone

2

Omega General Help / Omega X25 ABS Lights

« on: 27 December 2007, 23:23:05 »

 Hello everyone. I drive a '97 Estate 2.5 V6.  I got the car used and it's speedometer/ABS/TC was dead. I was able to find a replacement ABS pump (XD) which my mechanic insisted was the same as my ABS pump (XJ).  To save trouble, we did a quick ECU swap and behold, the speedometer came back to life, the auto tranny shifting became very smooth, the ABS/TC lights would go on upon ignition and both off after a few secs, which I was told passing the self-check.  Everything fine up to this point but as soon   the car moves forward/reverse, at roughly10 kph, the ABS/TC light comes on.  This happens in 8/10 starts, once in awhile the lights do stay off and the ABS works.  

I did an ODB2/Opel test and everything checked out. My first suspect were the ABS wheel sensors but they read kph data fine. The only error code that shows up is "35 Return Pump Relay circuit intermittent".  It is erasable and no other error codes appear.      
h relay is the pump relay? they don't look replaceable but are fixed to the ECU board.

My last observation is that right after starting the car, with ABS lights off and I move forward there is a slight drop in fanspeed right before the ABS light blinks then stays.  I presume there is a draw in electricity. Could my ABS unit's grounding be faulty?

Thanks again, I've tried to be as accurate as I could be.