ABS lights – Escort Cabrio 1994, 1,8L Zetec

Hello Ford specialists! ABS light on my Escort Cabrio Zetec engine 1.8 L 105 HP burns and always immediately before it starts. I cleaned both sensors VRN and the donor ring so far, on both sides also the plug connection behind the sensors and both ohmic measured. Both 1092 ohms and probably therefore both in order. At the back I saw NO cables right away but I suppose he must have ABS on all wheels. Where is there (drum brakes) of the S ensor? Is the ABS controlled by my car in the ECU or is there an OWN for ABS and if yes – where is it??? I am grateful for every tip now.