TEST ACTION APPLICABILITY
2 Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, read DTCs.
With the DRBIIIt, erase DTCs.
Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, actuate the ABS Pump Motor.
Did the ABS Pump Motor operate?
All
Yes → Go To 3
No → Go To 4
3 Turn the ignition off.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Make sure the Pump Motor connecter is secure.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
All
Yes → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No → Test Complete.
4 Turn the ignition off.
Remove and inspect the ABS Pump fuse.
Is the ABS Pump fuse open?
All
Yes → Go To 5
No → Go To 8
5 Turn the ignition off.
Visually inspect the ABS Pump Fused B(+) circuit in the wiring harness.
Look for any sign of an intermittent short to ground.
Is the wiring harness OK?
All
Yes → Go To 6
No → Repair the ABS Pump Fused B(+) circuit for a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
6 Turn the ignition off.
Disconnect the CAB harness connector.
Check connectors - Clean/repair as necessary.
Using a 12-volt test light connected to 12-volts, probe the ABS Pump Fused B(+)
circuit fuse terminal.
Does the test light illuminate?
All
Yes → Repair the ABS Pump Fused B(+) circuit for a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 7
25
BRAKES (CAB)
PUMP CIRCUIT FAILURE — Continued
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