ABS Main Relay: Description and Operation

The ABS electrical system has two relays and three fuses, located in the underbonnet relay and fuse box:
1. ABS valve block and ECU relay RL 2, yellow.
2. Hydraulic pump relay, RL 17 black. Note that this relay is unique to the ABS system.
3. Hydraulic pump relay fuse, 40 amp, Maxi 3.
4. Valve relay fuse, 30 amp, F27.
5. Valve relay fuse, 5 amp, F24.