For a 94 car, there is no relay. It's all contained in the ecu under the rear seat.
If you start the car up, the ABS light should go off within 5 seconds. If it doesn't it's likely a pump / modulator fault since you've already swapped the ecu.
There are 2 relays in the modulator which can be swapped out
__________________
1991 90 quattro 20v sport
1991 90 quattro
|