Ford 2003 Mustang Workshop Manual page 655

Does the pump motor operate?
PINPOINT TEST F: DTC C1145 (RF), C1155 (LF), C1165 (RR), C1175
(LR), ANTI-LOCK BRAKE SENSOR INPUT CIRCUIT FAILURE
F1 CHECK THE SUSPECT ANTI-LOCK BRAKE
SENSOR CIRCUIT FOR SHORT TO POWER
Key in OFF position.
Disconnect: Anti-Lock Brake Control Module C135.
Key in ON position.
Measure the voltage between anti-lock brake
control module C135 Pins, harness side and
ground as follows:
Anti-Lock Brake Control
DTC
C1145
(RF)
C1155
(LF)
C1165
(RR)
C1175
(LR)
Is any voltage present?
F2 CHECK THE SUSPECT ANTI-LOCK BRAKE
SENSOR CIRCUIT FOR SHORT TO GROUND
Key in OFF position.
Measure the resistance between anti-lock brake
Test Step
Module C135 Pin
4
20
1
22
Result / Action to Take
Yes
REPAIR the circuit in question.
CLEAR the DTCs. REPEAT the self-
test.
No
GO to F2 .
Circuit
514
(YE/RD)
521
(TN/OG)
494
(TN/LG)
496 (OG)
Yes
GO to F4 .
the self-test.