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sprinkles08
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 22990
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
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After reading thgthgis about the fcm can I get one from junk

Customer Question

After reading thgthgis about the fcm can I get one from junk yard and not have to have it reprogrammed?
JA: What is the model/year of your Dodge?
Customer: 05 2500 with the 5.9 Cummins
JA: Are you fixing your 2500 yourself? What have you tried so far?
Customer: Yes my self I have went thew all the body grounds and changed the headlight bulbs .
JA: Anything else you want the mechanic to know before I connect you?
Customer: Every time you open the doors the headlights flash the wipers came on a few times when all power was off
JA: Have you checked the fuses? Have you checked the bulbs?
Customer: Yes tryed many new sets of bulbs and all fuses
Submitted: 11 months ago.
Category: Dodge
Customer: replied 11 months ago.
05 dodge ram 2500 5.9 Cummins the lights flicker when you open the doors and after shutting it if the wipers came on a few times I cleaned all grounds and replaced the lights with a few different sets all new and checked the fuses ?
Expert:  sprinkles08 replied 11 months ago.

Hello and welcome to JustAnswer!

The FCM stores the vehicle's VIN and build configuration. This information is written automatically when a new module is installed and can't be erased or rewritten if installed on another vehicle. FCM's should not be swapped between vehicles because it can corrupt the build configuration.

Customer: replied 11 months ago.
do you think the fcm could be my problem or would it be something else I have heard these years are now for wiring problems
Expert:  sprinkles08 replied 11 months ago.

I don't recall seeing an FCM ever fail on these trucks.

What exactly are you seeing with the lights?

Was any actual testing done for the wiper issue?

Customer: replied 11 months ago.
No test I'm a very diy and very mechanical inclined . Even time you open the doors the headlights flash
Expert:  sprinkles08 replied 11 months ago.

When the door is opened or when the unlock button on the key fob is pressed?

Do they flash once? How long do they stay on?

Customer: replied 11 months ago.
When you open the door not hitting the on lock or any thing they just flash one time every time you open a door
Expert:  sprinkles08 replied 11 months ago.

Did that star at exactly the same time as the wiper issue?

Are there any electrical modifications to the truck?

Customer: replied 11 months ago.
No wipers did it first and I have changed all most all the light bulbs with led trying different things to stop it but it was all stock when it started
Expert:  sprinkles08 replied 11 months ago.

Do you have access to a scan tool capable of reading FCM data?

Customer: replied 11 months ago.
No I don't I have a scan tool to read codes but I don't think I will do that
Expert:  sprinkles08 replied 11 months ago.

Are you able to unplug the instrument cluster and see if both problems are still present?