98 S-70 GLT; ABS & Traction control lights come off and on.....

My 98 Volvo S-70 GLT, has a problem with the ABS and Traction contol
system, turning on and off lights. When it either turns on or off, I can
hear the noise of the abs motor and feel the brake pedal pulsate, when it
makes this noise. I understand that their is an epidemic problem with the
ABS computer, that cost around 600.00. I don't have 600.00 now for that
computer. I wonder why it keeps turning off and on. It sounds as if it has
a loose connection or maybe a loose solder connection. Has anyone out there
had similar problems, sure would like to hear how you have repair you car.
I dont want to get a used one from the salvage yard im afraid I will get
one with the same problem. I appreciate any comments from anyone who can
assist..Thanks Robie

 

Try:

http://home.earthlink.net/~vicrocha/Volvo_Parts/Volvo_V70_ABS.htm

 

The problem you discussed is very common and very expensive.
The problem is caused by a broken solder joint. You could try to
dissassemble the module and repair it but I doubt the repair you last very
long. Just know that the ABS and /or Tracs may not work when you really
need it.

 

There is another possibility . . .

Starting with the Right Rear wiring (the usual culprit, as I recall),
check connection and condition on wiring in the motion sensing system.
This is the system that reports the rate of rotation to the on board
computer and to the dread ABS Control Module. An interrupted circuit
(usually intermittent) in this system may report that a wheel has a
differing (usually slower) speed when the brakes are applied - thus
operating the ABS process.

Since just dirt is enough to cause problems here, it's surely worth the
effort. My friendly Dealer comments that their perpetual fears of
subsequent litigation virtually force them to replace the Module, even
when such an on/off problem is the clear choice for cause. Ain't
lawyers wonderful?!

bob noble
Reno, NV, USA

 

Thanks Bob for your advice. Much appreciated..will try these things. Larry