Freightliner sam chassis swap

Daniel Owner Alabama Posted   Latest   Edited  
Resolved
Electrical
Heavy Duty
2014 Freightliner Cascadia 113 11.9L (ISX 11.9)

I have a 2014 Freightliner Cascadia, last 6 of the Vin: FZ0008. I know the Sam chassis is going bad, issues with voltage to some lights, and now an issue with voltage to the abs module, which I suspect is caused by the Sam chassis.

I want to try to replace this on the cheap, I can buy a Sam chassis, but I need to know the compatibility issues. From my research I know, or at least think I know, that unless I want to take it to the dealer to get it flashed the software version on the new Sam has to match the Sam that's in the truck now. 

There seems to be too many part numbers to list, is there a compatibility chart or cross reference for it? I found an old NHTSA safety sheet that listed compatible parts for older Freightliner models, but haven't seen anything more current.

I'm attaching a photo of the currently installed Sam, and one of the one I ordered, if it won't work I can always return it. If anyone can give me some guidance on compatabilty I would appreciate it. Also the sam currently installed doesn't match the VIN according to DDDL.

Another thought, is it possible to open the Sam that is installed and use some electrical cleaner to remove any corrosion that may be causing problems? And is there any good way to completely seal the Sam to avoid water infiltration in the future? I thought of putting a couple of small silica packets inside to absorb any moisture, they aren't conductive so should cause a problem.

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Michael Mechanic
Texas
Michael Default
 

If we are talking about the module on the firewall below the steering column... I have replaced before as a plug and play... no programming necessary. Unit has 3 large amp fuses in it.

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Daniel Owner
Alabama
Daniel Default
 

I know which part you are thinking of, this is the computer that Freightliner, in their infinite wisdom, decided was better than old fashioned, reliable relays and switches. It operates or supplys power to nearly everything attached to the chassis of the truck, even other computers. I added a photo as reference.

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Denis Service Manager
Alberta
Denis Default
 

As far as I know, new ones are “blank” and need to be programmed.

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Nicholes Technician
Pennsylvania
Nicholes Resolution
 

It needs programming, since some of the parameters might be different then what it comes with. There is different part numbers for the Sam chassis module since there is a baseline , midline and highline modles. If you have the last 6 or the vin i can try looking it up in parts pro what it should need.

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Daniel Owner
Alabama
Daniel Default
 

That would be great, the last 6 is FZ0008. I remember reading a service bulletin that said you could up in Sam level but you can't go down. I did come across something interesting when I was looking at dddl. The VIN attached to the Sam Chassis that's already in the truck has a completely different VIN. Just out of curiosity I Googled the Vin from the Sam, and it pulled up a truck a year older…

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Nicholes Technician
Pennsylvania
Nicholes Default
 

Sorry it won’t let me look it up, since the vin is on our fleet. But yes you will Be able to drive it to go to a shop to get it programed. I would just verify the lights are working before you do drive it on the road.

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Daniel Owner
Alabama
Daniel Default
 

I know the truck was owned by two different companies in the past, so it's not surprising. Maybe someone has some parts compatibility information, or else when I get home later this week I'll find out first hand if the one I purchased will work

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Daniel Owner
Alabama
Daniel Resolution
 

The swap was successful, and since the truck was at freightliner for other work I had them program it without any issues.

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