TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Remove ABS PUMP Fuse #12 from the Power Distribution Center (PDC).
Disconnect the CAB connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance of the Fused B (+) circuit between the PDC Fuse Terminal
and the CAB connector.
Is the resistance below 10 ohms?
All
Yes
→ Go To 8
No
→ Repair the Fused B(+) circuit for an open. The CAB must sense all
four wheels at 25 km/h (15 mph) before it will extinguish the ABS
Indicator.
Perform ABS VERIFICATION TEST - VER 1.
8
Turn the ignition on.
Using a 12-volt test light connected to ground, check the B+ supply to Fuse 12 in the
PDC.
Is the B+ supply OK?
All
Yes
→ Go To 9
No
→ Repair the B+ supply for an open. The CAB must sense all four
wheels at 25 km/h (15 mph) before it will extinguish the ABS
Indicator.
Perform ABS VERIFICATION TEST - VER 1.
9
Turn the ignition off.
Disconnect Pump Motor Connector.
Connect a 10 gauge jumper wire between pump motor Fused B (+) circuit and a 40
Amp Fused B (+) circuit.
Connect a 10 gauge jumper wire between pump motor ground circuit and a known
good body ground.
Monitor Pump Motor operation.
Is the pump motor running?
All
Yes
→ Go To 10
No
→ Replace the Controller Antilock Brake in accordance with the
Service Information. The CAB must sense all four wheels at 25
km/h (15 mph) before it will extinguish the ABS Indicator.
Perform ABS VERIFICATION TEST - VER 1.
10
Turn the ignition off.
Disconnect CAB Connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance of the CAB ground circuits.
Is the resistance below 1.0 ohm?
All
Yes
→ Go To 11
No
→ Repair the ground circuit for an open. The CAB must sense all
four wheels at 25 km/h (15 mph) before it will extinguish the ABS
Indicator.
Perform ABS VERIFICATION TEST - VER 1.
27
BRAKES (CAB)
PUMP MOTOR NOT WORKING PROPERLY —
Continued