Wagoneer L4-150 2.5L VIN E TBI (1990)
ABS Pump: Service and Repair
WARNING: The normal working pressure of the anti-lock boost system is 1650-2050 PSI. System pressure must be pumped down before any
pressure lines are loosened/disconnected. Failure to do so could result in personal injury. To reduce system pressure, turn the ignition switch
off. Then apply the brakes 45-50 times (until brake pedal becomes firm on initial apply) to reduce fluid pressure in the accumulator, booster,
pump and lines. Wear safety goggles when disconnecting system fluid lines.
BOOSTER PUMP AND MOTOR REMOVAL
1. Turn ignition switch to Off position and apply brakes (pump pedal) 45-50 times (until pedal is firm on initial apply) to reduce system fluid
pressure. When reserve pressure is depleted, the reservoir fluid level will rise above the MAX fill mark but will not overflow unless the reservoir
was overfilled to be- gin with.
2. Disconnect battery negative cable.
Fig.26 R&R Pump Mounting Bracket
3. Remove coolant pressure bottle retaining strap and move reservoir aside. It is not necessary to disconnect pressure bottle hoses. Just move bottle
aside for working clearance.
Fig.27 Pump Motor Harness And Relay
4. Remove bolts attaching two-piece mounting bracket to dash and inner fender panels.
5. Rotate bracket and pump/motor assembly to one side for access to wires and hoses.
6. Disconnect pump motor harness from engine harness.
