S70 ABS light

OK, now my 1998 S70T5's ABS light comes on intermittently. I've done
various forum searches, and many mention the ABS and TRAC light coming on
together. On mine, it's just the ABS.

It comes on when starting sometimes, sometimes it won't. It will come on
when driving sometimes, and sometimes it will go away.

I think it's pretty obvious that I should replace the sensor. However,
here's another question with that .... would this in any way be able to
drain my battery? My car wouldnt' start during lunch, and the battery
place's gauge couldn't get a reading on whether or not the battery could
hold a charge. It just read that the battery's health was 0. I got a brand
new battery out of it for $22.48, which is not too bad since the battery
was about 19 months old. They applied my full price that I paid last time
to the new battery and only made me pay miscellaneous fees.

Thanks,
Mike

 

Pull the code, find out it's the right rear wheel sensor, and order a
new control unit or have yours "rebuilt." The circuit board inside the
case is poorly supported and poorly potted. The solder joints toward the
outside edges tend to crack. The outermost wire pair on one side is the
right rear wheel sensor and the crack causes the signal from that sensor
to be erractic. This turns on the light. On later models the speedometer
quits at the same time.

If the amber warning light is on then the system is telling you that the
ABS portion of the brake system is disabled but the brake system itself
is fine. If there were a problem with the brake system hydraulics then
the red brake warning light would illuminate. Red means stop, amber
means slow down and pay attention, no light is the same as green--just
go.

Bob