Landroverscott

New Member
2001 4.6 THOR - WABCO 'D' ABS system.

The brakes became soft. I checked red for leaks, bled the system and replaced the brake pressure pump accumulator (STC2784); the brakes still needed pumping.

On braking, 3 warning lights illuminate: ABS, Handbrake & Traction Control, so I replaced the Wabco ABS control module ECU (SRD100501), still no luck.

My next thought is to replace the ABS Booster Pump & pressure switch (WML 70749). These are expensive, even second-hand, so any other ideas would be welcome 👍

If I do need to replace the Booster, does anyone know an outfit that refurbishes them?
 
2001 4.6 THOR - WABCO 'D' ABS system.

The brakes became soft. I checked red for leaks, bled the system and replaced the brake pressure pump accumulator (STC2784); the brakes still needed pumping.

On braking, 3 warning lights illuminate: ABS, Handbrake & Traction Control, so I replaced the Wabco ABS control module ECU (SRD100501), still no luck.

My next thought is to replace the ABS Booster Pump & pressure switch (WML 70749). These are expensive, even second-hand, so any other ideas would be welcome 👍

If I do need to replace the Booster, does anyone know an outfit that refurbishes them?
Firing the parts cannon is an expensive way of fixing things.
Does the brake pump run? It should run every 3 to 5 depressions of the brake pedal. If it doesn't run then check the fuses but it's likely that the pressure switch has failed. The switch is hard to come by but was used on other vehicles including SAAB and Jaguar.
You say you bled the brakes, did you follow correctly the procedure in RAVE? If not you may have made matters worse.
Diagnostics may help.
 

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