Ford F150 Pickup. Instruction — part 315
Fig. 28: Installing Key Release Button
Courtesy of FORD MOTOR CO.
2003 Ford Pickup F150
2003 STEERING Steering Column Switches - F150 Pickup
2003 ACCESSORIES AND EQUIPMENT
Warning Devices - F150 Pickup
DESCRIPTION AND OPERATION
WARNING DEVICES
The warning device system consists of the following:
z
key-in-ignition warning switch
z
door open warning lamp switch
DIAGNOSIS AND TESTING
GAUGES AND WARNING DEVICES - GEM/CTM
Refer to WARNING SYSTEMS and INSTRUMENT CLUSTER for schematic and connector information.
Special Tool(s)
2003 Ford Pickup F150
2003 ACCESSORIES AND EQUIPMENT Warning Devices - F150 Pickup
2003 Ford Pickup F150
2003 ACCESSORIES AND EQUIPMENT Warning Devices - F150 Pickup
Fig. 1: Identifying Special Tool(s) For Gauges And Warning Devices - GEM/CTM
Courtesy of FORD MOTOR CO.
z
central timer module (CTM)
z
generic electronic module (GEM)
z
driver safety belt switch (integral to the safety belt buckle)
GEM/CTM Input/Output Description
2003 Ford Pickup F150
2003 ACCESSORIES AND EQUIPMENT Warning Devices - F150 Pickup
Fig. 2: GEM/CTM Input/Output Circuit
Courtesy of FORD MOTOR CO.
Principles of Operation
The generic electronic module (GEM) and central timer module (CTM) control the following warnings and
chimes:
z
driver safety belt not fastened (warning lamp and repetitive chime)
z
key-in-ignition warning (repetitive chime)
z
headlamp-on warning (repetitive chime)
z
door ajar (warning lamp and single tone)
z
air bag redundant (repetitive chime)
The following five distinct chime rates are used to indicate warning:
2003 Ford Pickup F150
2003 ACCESSORIES AND EQUIPMENT Warning Devices - F150 Pickup
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