Front Control Module would explain this

Operation

FRONT CONTROL MODULE
The Front Control Module (FCM) is an electrical control and interface center located in the engine compartment. When it is mated to the Power Distribution Center (PDC), it is referred to as the Integrated Power Module (IPM). The IPM, with its fuses and relays provides power and signal distribution throughout most of the vehicle. The FCM receives both hard wire and digital electronic inputs from the vehicle electrical system through the PDC. Based on these inputs and the ignition switch position, it provides direct power feeds and relay control to some of the vehicles' most critical electrical systems.

The Front Control Module provides the following features:

Controlled power feeds:
- Front airbag system
- Headlamp power
- EATX module power (4 speed only)
- Front washer motor
- Rear washer motor
- Cabin Heater
- Brake shift interlock system

Relay controls:
- Fog lamp relay (when equipped)
- Park lamp relay
- Front wiper on relay
- Front wiper high/low relay
- Accessory relay
- Horn relay
- Front & rear blower relay
- Adjustable pedals relay (non-memory)
- Electronic back light (EBL) run only relay

Electrical inputs:
- Headlamp battery supplies 1 & 2
- Module battery supply
- Power ground
- Ignition switch RUN or START position status
- Ignition switch START only status
- PCI Bus
- Stop lamp switch
- Horn switch
- Back-up switch
- Wiper park switch
- Washer fluid level switch
- Brake fluid level switch
- Ambient temperature sensor
- Right park lamp outage
- Left park lamp outage
- Battery IOD
- Battery (+) connection detection

CONTROLLED POWER FEEDS

Front airbag system
The FCM provides power to the Occupant Restraint Control (ORC) system through two "fuse-less" circuits (ORC RUN/START, and ORC RUN only). These circuits are electronically controlled and continuously monitored for malfunctions. Power is supplied while the ignition switch is in the RUN and START positions on pin 48 of the FCM connector, and in the RUN only position on pin 29.

Headlamp power
The headlamp switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it of a headlamp switch status change. The FCM then turns on power to the headlamps through four "fuseless" circuits. These circuits are electronically controlled and continuously monitored for malfunctions. Power is supplied to each filament in a separate circuit. For vehicles equipped with Daytime Running Lamps (DRL), the FCM electronically steps down the headlamp voltage to provide the desired illumination.

EATX power
The electronic automatic 4 speed transmission module is powered when the ignition switch is in the UNLOCK, RUN or START positions. This circuit is electronically controlled and continuously monitored for malfunctions. Power is supplied through pin 27 of the FCM connector.

Front washer motor
The front washer switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it of a request to wash. The front washer motor is then powered through low side control inside the FCM. This circuit is electronically controlled and continuously monitored for malfunctions. In addition, the FCM electronically protects the washer motor from system voltages higher than 16 volts by automatically switching off the low side circuit.

Rear washer motor
The rear washer switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it of a request to wash. The rear washer motor is then powered through low side control inside the FCM. This circuit is electronically controlled and continuously monitored for malfunctions. In addition, the FCM electronically protects the washer motor from system voltages higher than 16 volts by automatically switching off the low side circuit.

Cabin Heater
When the ignition is in Run, the FCM monitors the PCI bus for the Cabin Heater Activation request. The Automatic or Manual Temperature Control initiates this request only when all conditions for the Cabin Heater activation are favorable. The request carries the status bit that the FCM requires to activate its Cabin Heater Assist Control output. This output is a low side driver (coming from FCM pin 15) which supplies a ground signal to the Cabin Heater (pin 5). When the Cabin Heater receives this ground signal input, it interprets this as an activation signal. The FCM is capable of diagnostic sensing. A cabin relay open is sensed if the output is off and there is a open condition. A cabin relay short to voltage is sensed if the output is active and there is a short to voltage condition. The FCM will set DTCs for both of these types of faults.

Brake shift interlock system
The brake shift interlock solenoid receives power from both high side and low side controls inside the FCM. The high side control is on the same circuit as the EATX module power, and the low side control comes through pin 47 of the FCM connector. The solenoid is controlled by the low side driver when the brake pedal is pressed. Both circuits are continuously monitored for malfunctions.

RELAY CONTROLS

Fog lamp relay
The fog lamp switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it to turn on the fog lamp relay. The fog lamp relay is then powered through low side control of the FCM. This circuit is electronically controlled and continuously monitored for malfunctions. Fog lamp functionality is not equipped on all vehicles. The FCM "learns" that the vehicle is equipped with fog lamps by reading the BCM PCI Bus message.

Park lamp relay
The park lamp switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it to turn on the park lamp relay. The park lamp relay is then powered through low side control of the FCM. This circuit is electronically controlled and continuously monitored for malfunctions.

Front wiper on relay
The front wiper switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it to turn on the front wiper on relay. The front wiper on relay is then powered through low side control of the FCM. This circuit is electronically controlled and continuously monitored for malfunctions.

Front wiper high/low relay
The front wiper switch is a direct input to the BCM. The BCM sends a PCI Bus message to the FCM informing it to turn on the front wiper high/ low relay. The relay switches power between the low speed and high speed windings of the wiper motor. The front wiper high/low relay is powered through low side control of the FCM. This circuit is electronically controlled and continuously monitored for malfunctions.

Accessory relay
The accessory relay works in conjunction with the FCM's power accessory delay feature to control the operation of the radio, power windows, washer motors, wiper motors and power outlet. The accessory relay is turned on through low side control on pin 35 of the FCM. This circuit is electronically controlled and continuously monitored for malfunctions. Depending on the ignition switch position, the accessory relay will remain on or will time-out and turn off. The accessory relay remains on in the RUN and ACCY positions of the ignition switch. In the UNLK and OFF positions, the relay will remain energized for 45 seconds then turn off. During this time-out period, if the driver or passenger doors are opened, the relay will turn off immediately. While the ignition switch is in the START position, the relay will also drop-out, then resume operation. Accessory relay operation is most noticeable by observing the operation of the radio or blower functions.

Horn relay
The horn relay operates through a direct wire input to the FCM from the horn switch (FCM pin 17) , or a PCI Bus message from the BCM. The relay responds to the horn switch, remote door lock and VTA alarm functions. The horn relay is powered through low side control on pin 10 of the FCM. Under normal operating conditions, if the horn is pressed for longer than 30 seconds, the FCM will automatically deactivate the horn to prevent damage to it. The FCM will re-activate control of the relay after a 25 secondcool-down period. This circuit is electronically controlled and continuously monitored for malfunctions.

Front and rear blower relay

RS with MTC
Upon ignition on, the A/C-Heater Control Module sends a blower relay on request to the FCM over the PCI Bus. The front blower relay and the rear blower relay, if equipped, are then powered through low side control through FCM pin 30. The relay provides the high side to the blower motor, and the blower speed is governed through low side control in the A/C-Heater Control Module. This circuit is electronically controlled and continuously monitored for malfunctions.

RG with MTC
Upon power up (Power switch on), the A/C-Heater Control Module sends a blower relay on request to the FCM over the PCI Bus. The front blower relay is then powered through low side control through FCM pin 30. The relay provides the high side to the blower motor, and the blower speed is governed through low side control in the A/C-Heater Control Module. This circuit is electronically controlled and continuously monitored for malfunctions.

RS & RG with ATC
Upon power up (Power switch on), the Automatic Temperature Control (ATC) Module sends a blower relay on request to the FCM over the PCI Bus. The front blower relay and the rear blower relay, if equipped, are then powered through low side control through FCM pin 30. The relay provides the high side to the Blower Motor Power Module, and the blower speed is governed through control in the ATC Module. This circuit is electronically controlled and continuously monitored for malfunctions.

Electronic Back Light (EBL) relay
The rear defrost switch is part of the Automatic Temperature Control or A/C-Heater Control Module (Manual Temp). When the ignition switch is in the RUN position and the rear defrost switch is turned on, the ATC or A/C-Heater Control Module sends a PCI Bus message to the FCM. The EBL run only relay is then powered through low side control on pin 31 of the FCM. The relay provides the high side to the rear window defrost grid, and ground is attached to the vehicle body. The FCM will only allow the rear defrost to operate in the RUN position. This circuit is electronically controlled and continuously monitored for malfunctions.

Adjustable Pedals Relay (Non-Memory)
The Adjustable Pedals Relay is only on non-memory Adjustable Pedals System equipped vehicles. The relay is supplied battery voltage from the IPM and is electronically controlled with a low side driver within the FCM. The relay is energized when the transmission is in reverse and when cruise control operation is engaged. This action disables the Adjustable Pedals System from movement. This circuit is continuously monitored for proper function.

ELECTRICAL INPUTS

Headlamp battery supplies 1 & 2 - 12 volt input on pins 1 and 2. Battery supply voltage for switching headlamp circuits only.

Module battery supply - 12 volt input on pin 9. Battery supply voltage for all other FCM operations.

Power ground - Ground source on pin 8 for all FCM operations.

Ignition switch RUN or START position status- 12 volt input on pin 37. Allows the FCM to determine the ignition switch status for related FCM operations.

Ignition switch START only status - 12 volt input on pin 19. Allows the FCM to discriminate between RUN/START input and START for related FCM operations.

PCI Bus - Approximately 7.5 volt input on pin 22. Allows the FCM to communicate with other modules on the vehicle bus.

Stop lamp Switch status - 12 volt input on pin 44. Provides for brake shift interlock function.

Horn Switch - Ground input on pin 17. Primary means for engaging the horn.

Back-up switch - Ground input on pin 39. Input is converted to a PCI Bus status message for use by other modules.

Wiper park switch - Ground input on pin 16. Used to determine park placement of wipers. Also used as feedback to FCM to determine correct operating mode of wipers.

Washer fluid level switch - Ground input to pull-up on pin 18. Ground is switched into the circuit when washer bottle fluid level is low.

Brake fluid level switch - Ground input to pull-up on pin 36. Ground is switched into the circuit when brake fluid level is low.

Ambient temperature sensor - Resistive input to pull-up on pin 25. Corresponding voltage level is converted to a PCI Bus message for use by other modules on the bus.

Right park lamp outage - 12 volt input on pin 21. Used to determine if right park lamp circuit is operating properly.

Left park lamp outage - 12 volt input on pin 41. Used to determine if left park lamp circuit is operating properly.

Battery IOD - 12 volt input on pin 20. The FCM enters a low power consumption mode when the ignition is turned OFF. This low current draw battery supply keeps the microprocessor functioning in the low power mode.

Battery (+) connection detection - 12 volt input on pin 38. The battery connection on the PDC incorporates the use of an internal switch to determine if the connector is properly mated and the Connector Positive Assurance (CPA) is engaged. If the CPA is not properly engaged, a voltage on pin 38 will be interpreted as an unseated connector and a fault will set.

NOTE: If the FCM is replaced, ensure connection between the FCM and the PDC is in good condition.

sounds like rotten grounds or failed TIPM (which they are known for)

I would agree but i literally installed a whole new fuse box with fuses from mopar an my friend checked all the wiring an couldn't find anything 

I replaced that already when i did the fusebox replacement