RAM SRT-10 Pickup V10-505 8.3L (2004)
If the FCM receives a prolonged request to wash lasting 30 seconds or more, it will treat the request as a stuck switch condition and deactivate the
washer pump motor. The FCM will not reactivate the washer pump motor until there is at least a two second break in the request to wash from the
instrument cluster.
RELAY CONTROLS
Adjustable Pedals Relay
If equipped, the adjustable pedals relay, when not activated, supplies fused battery power to the adjustable pedals switch. If the FCM receives a bus
message that the vehicle is in reverse or that the cruise control is engaged, it will apply a ground to the adjustable pedals relay control circuit. The
ground will activate the relay which will open the power circuit to the adjustable pedals switch The relay control circuit is continuously monitored for
malfunctions which the FCM will report as DTCs.
Fog Lamp Relay
If equipped, the fog lamp switch is a direct input to the instrument cluster. The instrument cluster sends a PCI bus request to the FCM to turn on the
fog lamp relay. The fog lamp relay is then actuated by the FCM through low side control. This circuit is electronically controlled and continuously
monitored for malfunctions.
Horn Relay
The Horn Relay, which is internal to the IPM, is controlled by the FCM through PCI bus messages from the instrument cluster. These bus messages
will be sent when either the horn switch is pressed which is hard wired to the instrument cluster, panic mode is requested from the RKE or for vehicle
theft security reasons (if equipped). The relay control circuit is continuously monitored for malfunctions that the FCM will report as DTCs.
The park lamp switch is a direct input to the instrument cluster. The instrument cluster sends a PCI bus request to the FCM to actuate the park lamp
relay. The park lamp relay is then actuated through the low side control circuit. This circuit is electronically controlled and continuously monitored for
malfunctions.
Wiper High/Low Relay
The wiper switch is a direct input to the instrument cluster. The instrument cluster sends a PCI bus request to the FCM to actuate the wiper high/ low
relay. The relay switches power between the low speed and high speed of the wiper motor. The wiper high/low relay is then actuated through the low
side control circuit. This circuit is electronically controlled and continuously monitored for malfunctions.
Wiper On/Off Relay
The wiper switch is a direct input to the instrument cluster. The instrument cluster sends a PCI bus request to the FCM to actuate the wiper on/off
relay. The wiper on/off relay is then actuated through the low side control circuit. This relay switches power to the wiper high/low relay. This circuit is
electronically controlled and continuously monitored for malfunctions.
ELECTRICAL INPUTS
Module Battery Supply
12 Volt input for all FCM functions except headlamp operation.
Power Ground
Ground source for all FCM functions
Ignition Switch RUN or START Position Status
12 volt input to inform the FCM of the ignition switch status for related FCM functions.
PCI Bus
Approximately 7.5 volt input to allow the FCM to communicate with other modules on the PCI bus.
Wiper Park Switch
Ground input used to determine the park placement of the wipers. The ground is also used as feedback to the FCM to determine wiper operating mode.
Washer Fluid Level Switch
Ground input from the washer fluid level switch which closes when washer fluid is low.
Battery (+) Connection Detection
12 volt supply used to monitor battery connection to the IPM. The battery connection to the IPM uses an internal switch to check integrity of the
connection and that the Connector Positive Assurance (CPA) is engaged. If the CPA is not properly engaged, a voltage is sent to the FCM to be
interpreted as an unseated connector which will set a Diagnostic Trouble Code (DTC).
Heating & A/C System
SYSTEM AVAILABILITY
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Depending on the model, either a Single-Zone or Dual-Zone HVAC system is available in these vehicles.
