Ford 2003 Mustang Workshop Manual page 3674

D4 CHECK THE REARWARD POSITION INPUT
Connect: Seat Regulator Control Switch C360.
Measure the voltage between horizontal motor C362, Circuit 981
(RD/WH), harness side and ground.
Actuate the seat regulator control switch to the REARWARD
position.
Is the voltage greater than 10 volts?
D5 CHECK THE FORWARD POSITION INPUT
Measure the voltage between horizontal motor C362, Circuit 980
(YE/WH), harness side and ground.
Actuate the seat regulator control switch to the FORWARD position.
Is the voltage greater than 10 volts?
PINPOINT TEST E: THE POWER LUMBAR IS INOPERATIVE
E1 CHECK THE LUMBAR COMPRESSOR OPERATION
Actuate the lumbar seat control switch to the inflate position.
Did the lumbar compressor motor run?
E2 CHECK CIRCUIT 566 (DG)
Disconnect: Lumbar Seat Control Switch C361.
Measure the voltage between lumbar seat control switch
C361, Circuit 566 (DG), harness side and ground.
Test Step
Yes
GO to D5 .
No
INSTALL a new
seat regulator
control switch.
REFER to Switch—
Seat Regulator
Control . TEST the
system for normal
operation.
Yes
INSTALL a new
seat track. REFER
to Seat Track .
TEST the system
for normal
operation.
No
INSTALL a new
seat regulator
control switch.
REFER to Switch—
Seat Regulator
Control . TEST the
system for normal
operation.
Result / Action to Take
Yes
GO to E6 .
No
GO to E2 .
Yes
GO to E3 .
No
REPAIR the circuit. TEST
the system for normal
operation.