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sprinkles08
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 21591
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: 1 month ago.
Category: Dodge
Customer: replied 1 month 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 1 month 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 1 month 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 1 month 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 1 month ago.
No test I'm a very diy and very mechanical inclined . Even time you open the doors the headlights flash
Expert:  sprinkles08 replied 1 month 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 1 month 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 1 month ago.

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

Are there any electrical modifications to the truck?

Customer: replied 1 month 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 1 month ago.

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

Customer: replied 1 month 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 1 month ago.

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

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