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Discussion Starter #1
My wife's car, which is a 2007 Chrysler 300 base model (smallest motor), 90,000 miles, has developed a couple issues lately and it's kinda got me scratching my head. To begin with, here is what I have been seeing.

About 6 months ago, on the way to the airport (at night), the dash lights started pulsating at a very fast rate. The headlights do the same thing. BUT, not every time we drive it at night and it may take it 30 minutes until it starts.

The wife says the headlights have turned themselves off and flashed other drivers but I have not experiences this.

About the same time frame, when using the windshield wipers, maybe once out of 20 times when turning them off, the may or may not stop. OR, they may turn off but not go back to the park area. They may "Park", right in the middle of the windshield. ALSO intermittently......

The left rear turn signal bulb will not work and the dash indicator will flash really fast. Also intermittently and may work for 2 weeks without an issue and perform as normal.

The stereo is whacked, and only plays out of the left front door speaker (although the stereo may be a separate issue and has been toast for a year).

I had a new battery installed, Checked for codes at the OBDII connector (none displayed), I have monitored the voltage at the battery and see no anomalies, cleaned some connectors/bulbs/fuses and yesterday, I finally stopped at the dealer and he agreed that most all the problems have nothing in common except that the ECU or PCM if you wish, monitor all this crap and could have an issue. He offered to "stick it on the diagnostics machine" and when asked what do you do if you find nothing, he replied, charge you a [email protected] of money for nothing.

I could throw a bunch of money at it like everybody else and replace the Alternator (I call BS on this. They work or they don't), headlight switch, dimmer switch, blinker switch, windshield wiper switch but I'm not convinced it's any of these except the PCM, which makes sense. I see some have had theirs replaced (with some success) or reprogrammed (with some success). Remember, the issues are all intermittent and do not happen at the same time.They are gremlins roaming about. I can "Play" with the switches during the problem and it will not make a difference.

Thoughts???
 

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Discussion Starter #2
After doing some serious reading, it would appear that the FCM (front control module) is responsible for about all of my symptoms. I found THAT info on this thread (about halfway down the page). OH, AND my rear defroster is dead.


Here is what it does:

Powertrain Control Module has an 8 year / 80,000 mile warranty.

The Front Control Module (FCM) is a micro controller based module located in the right front corner of the engine compartment. The front control module mates to the power distribution center to form the Integrated Power Module (IPM). The IPM connects directly to the battery and provides the primary means of circuit protection and power distribution for all vehicle electrical systems. The FCM controls power to some of these vehicle systems electrical and electromechanical loads based on inputs received from hard wired switch inputs and data received on the CAN bus circuit.

As messages are sent over the CAN bus circuit, the Front Control Module (FCM) reads these messages and controls power to some of the vehicles electrical systems by completing the circuit to ground (low side driver) or completing the circuit to 12 volt power (high side driver). The following functions are controlled by the FCM:

Air conditioning condenser cooling fan
Daytime running lamps - if equipped
Fog Lamps
Front and rear hazard warning lamps
Front turn signals
Headlamps
Horn
Radiator fans
Rear window defroster power and timing
Stop, turn signal and tail lamps
Windshield and liftgate wiper and washer systems

The FCM provides the following features for the above function:

Acts as a link between the CAN bus network for critical powertrain, anti-lock brake systems, electronic stability program systems and the network for body and interior modules.
Controls the wipers based on messages on the CAN B bus from the rain sensor module (if equipped).
Controls the adjustable pedal motor on non-memory equipped vehicles.
Controls back-up lamps.
Flashes lamps in response to turn signal, Remote Keyless Entry (RKE) and Vehicle Theft Security System (VTSS) inputs.
Illuminated approach feature that turns the headlamps on when the vehicle is unlocked with the Remote Keyless Entry (RKE) transmitter.
Minimizes voltage variations to the headlamps to extend bulb life and to equalize the light output from the lamps, which might otherwise differ due to variations in wiring resistance.
Monitors battery voltage and turns off non-essential functions such as the fog lamps, rear window defogger, and heated seats if necessary to conserve battery power.
Operates the high-beam headlamps at reduced intensity by pulse-width modulation of the power supply to provide the daytime running lamps.
Protects the battery from discharge if the headlamps are left on, by automatically turning them off after eight minutes.
Provides ambient temperature sensor information.
Provides A/C pressure transducer information.
Provides brake fluid level information.
Provides washer fluid level information.
Provides the variable delay intermittent windshield and liftgate wiper time delay features, and the vehicle speed sensitive windshield wiper delay variation.
Sounds the horn in response to RKE and VTSS inputs.
Turns off the horn in the event of excessively long operation that could otherwise damage the horn.
Turns off the windshield washer motor after 10 seconds of continuous operation to protect the motor.
Controls headlamp washers (if equipped).
Provides wheel speed information on non-ABS equipped vehicles.
Stores vehicle configuration data.
 

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It could be the FCM. However, on my ‘13, my alternator started going on the fritz. I didn’t pay attention thinking it was a simple glitch. A few more glitches and couple of days later, my alternator blew up. Took the FCM and battery with it. FCM was over a grand but under warranty. Battery was not covered...$250. Don’t mess around; get your electrical system, especially the alternator, checked soon.


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Discussion Starter #4
It could be the FCM. However, on my ‘13, my alternator started going on the fritz. I didn’t pay attention thinking it was a simple glitch. A few more glitches and couple of days later, my alternator blew up. Took the FCM and battery with it. FCM was over a grand but under warranty. Battery was not covered...$250. Don’t mess around; get your electrical system, especially the alternator, checked soon.


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Glitches???? How about elaborating. "Glitches" can mean a lot of things. Did it exhibit any of the item my car is doing?
 

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Discussion Starter #5
It sounds more like the other members are seeing with corrosion between the Power distribution and the FCM (The fuse box and the FCM).
 

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Yes, I had some same issues like dash lights fading and blinking, wipers, radio, and interior lights not coming on, but not as serious as you are experiencing. And all this happened fairly fast...over the course of a couple days at most. Then on way home from dinner, it just died. Engine stopped. No warning lights. No dash lights. All black. No nothing. I coasted to the side of the road. No power anything. Luckily, I was on a side street.

I looked back at my records...alternator was the cause. Just that and my battery. My FCM was unscathed (recollection is a fuzzy thing!).


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Yeah, not convinced that mine is an alternator. Seen a bunch of members replace them and it did nothing. My issues are intermittent, and have been happening for 6 months. Sounds more like the corrosion of the TIPM Assy (FCM and Fuse Box).
 

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Yes, I had some same issues like dash lights fading and blinking, wipers, radio, and interior lights not coming on, but not as serious as you are experiencing. And all this happened fairly fast...over the course of a couple days at most. Then on way home from dinner, it just died. Engine stopped. No warning lights. No dash lights. All black. No nothing. I coasted to the side of the road. No power anything. Luckily, I was on a side street.

I looked back at my records...alternator was the cause. Just that and my battery. My FCM was unscathed (recollection is a fuzzy thing!).


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Mine is a Phoenix car too... (I'm in Sierra Vista)
 

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There’s such a thing as corrosion in Sierra Vista? What’s that. I don’t have that here in Phoenix!


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There’s such a thing as corrosion in Sierra Vista? What’s that. I don’t have that here in Phoenix!


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We're at nearly 5000 feet elevation, get lots of rain, SOME snow, humidity too..... Corrosion? Heck yeah, perfect conditions. I'm 5 miles south of Sierra Vista up against the mountains. I keep hearing "It's a dry Heat" I call BS.... Maybe in Phoenix,Tucson, or Yuma.
 

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I'm pulling the FCM/Fuse Box and do some inspections of the connectors and associated.... I'll treat the connectors and fuse holders with Deoxit and check/clean the grounds. The car is not worth spending thousands of dollars on.
 
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