bryn_p

Morning all,

I have a 1990 C2 Tiptronic with what I hope is a bad ABS relay.

ABS light is on all the time, the spoiler light is on and the speedo is not working.
From searching this forum I concluded that the next step is to replace the ABS relay.

So my question is, where is it? Is it one on the pump itself or is it located in the fuse box?

Many thanks,
Bryn.

Rocket Rob

The ABS relay is in the trunk with the fuse/relay box. Open the fuse box and read the underside of the cover, it will list the relays and their respective locations.

bryn_p

Thanks for the info.

I quickly tried out a different relay and ABS ECU tonight but no luck. Would you expect the result to be instant or will a battery disconnect or quick drive be required?

Also can the left side front abs sensor cause the above problems, or any other components for that matter?

Many thanks,
Bryn.

pat056

My experience w/my 1992 race car is once the abs is activated, turning the car off/on should reset. I actually put a toggle switch on mine so if it's activated, i can reset on the fly. Spoiler light and speedo are beyond me. I thought the speedo pick-up was on the transmission?

bryn_p

I think that is the case on pre-1991 models, but as I understand it, for the 1991 model year (and 1990 Tiptronics) the speedo pick up is from a wheel speed sensor mounted on the left hand front hub.

Can anyone confirm this?

Many thanks,
Bryn.