Off - Ford 2003 Mustang Workshop Manual

B4 TEST THE GEM CONTROL OF WIPER HIGH/LOW RELAY
Trigger the GEM active command WIPER RLY to ON.
Trigger the GEM active command SPEED RLY ON and

OFF.

Does wiper speed change on activation and
deactivation of SPEED RLY command?
B5 DETERMINE IF GEM IS RECEIVING CORRECT WIPER
POSITION STATUS
Monitor GEM PID WPPRKSW while turning the wipers ON
using the multifunction switch.
Do the PID values agree with the wiper position?
B6 TEST THE MULTIFUNCTION SWITCH FOR NORMAL
OPERATION
Disconnect: Multifunction Switch C202a.
Check the multifunction switch. Refer to Wiring Diagrams,
Cell 149, Component Testing.
Is the multifunction switch OK?
B7 CHECK CIRCUITS 682 (DB), 684 (PK/YE), AND 680
(LB/OG) FOR SHORT TO BATTERY BETWEEN THE GEM
AND THE MULTIFUNCTION SWITCH
Disconnect: GEM C201e.
Key in ON position.
Using the following table, measure the voltage between
the GEM C201e Pins, harness side and ground.
Pin Circuit
5 682 (DB)
18 684 (PK/YE)
19 680 (LB/OG)
Are the voltages greater than 10 volts?
B8 CHECK CIRCUITS 682 (DB), 684 (PK/YE), AND 680
No
GO to B10 .
Yes
GO to B5 .
No
GO to B16 .
Yes
INSTALL a new GEM. For
additional information,
REFER to Section 419-10
CLEAR the DTCs. REPEAT
the self-test.
No
GO to B27 .
Yes
GO to B7 .
No
INSTALL a new multifunction
switch; REFER to Section
211-05 . REPEAT the self-
test. CLEAR the DTCs.
Yes
REPAIR the circuit(s) in
question. REPEAT the self-
test. CLEAR the DTCs.
No
GO to B8 .
.