Ford 2003 Mustang Workshop Manual page 3678

Is the resistance less than 5 ohms?
F4 CHECK THE BOLSTER/LUMBAR SEAT CONTROL
SWITCHES
Carry out the bolster/lumbar seat control switch component
test.
Refer to Wiring Diagrams Cell
connector information.
Did the seat control switches pass?
F5 CHECK THE LUMBAR ADJUSTING SYSTEM
Actuate the bolster/lumbar seat control switches to the
inflate position while observing the seat backrest lumbar
adjusting pad, backrest bolster and cushion bolster.
Did the seat bolsters/lumbar adjusting pads inflate?
F6 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
Visually inspect the seat backrest lumbar adjusting pad.
Is the seat backrest lumbar adjusting pad damaged?
F7 CHECK AIR FLOW FROM LUMBAR COMPRESSOR
Disconnect the seat backrest lumbar adjusting hose from
the connection at the seat pivot bolt.
Actuate the lumbar seat control switch to the inflate position
while feeling for air at the connection.
Is air felt at the lumbar motor hose connection?
149 for schematic and
Yes
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor . TEST the
system for normal
operation.
No
INSTALL a new
bolster/lumbar seat control
switch. REFER to Lumbar
Control Switch . TEST the
system for normal
operation.
Yes
GO to F9 .
No
For seat backrest lumbar,
GO to F6 . For seat
backrest bolster, GO to
F10 . For seat cushion
bolster, GO to F14 .
Yes
INSTALL a new seat
backrest lumbar adjusting
pad. REFER to Lumbar
Assembly . TEST the
system for normal
operation.
No
GO to F7 .
Yes
GO to F8 .
No
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to