I had this very issue. Folks, don't ignore it like I did! It's cascading effect of problems with exterior lighting! Ultimately it was caused by water getting into the SAM chassis module, due to a missing cover that had been missing from before I bought the truck. Definitely be sure your cover is in place and tightened down
Thanks for the video. I miss the good ole days when trucks had relay circuits. Everything went downhill with all these modules. I can understand for engine control etc. but for chassis components is just ridiculous. Multiplex wiring sucks.
I have a fleet of Cascadias, the SAM chassis module will also quit powering a tail-light for the same reason. There is another pin on same connector that from the factor powers "side marker light" that is hooked to nothing. Move tail-light connector to that position and lights will work correctly, would have to look up pin position but it has worked for years and for free, minus labor of course!
i had this same problem people . What happens water gets in the Sam chassis and damage it and cause your tail light to stay on when truck is turned off. Get this fix ASAP if not it will cause other problem. The Sam chassis is like a house window with caulking around it after time the caulking disintegrate and water gets in and cause that to happen. You can take it out your truck yourself bring it to dealership buy new one put it back in your truck then bring it to dealership to program it. You let them take it out and install it you gonna pay more money and for programing .
You just have to swap it out. No programming needed. Also they are $950 now with core exchange. Freightliner dealership informed Me they are no longer doing reman. Before trading in your sam module clean it up makesure no burn marks. Dealer will reject it.
This is just a side note to add. I gave freightliner a non working module from the junk yard and opened my original. I was able to clean all the areas that had corrosion, and I used a soldier iron to heat up those contacts. I removed the new sam module and reinstalled my original, and it's working. Still keeping replacement stored under bunk.
That happens to the 2024 freightliners. Every now and then when i go to shut the truck off that right light stays on just tap the brakes before u shut the battery kill switch on. Think thats hooked up to the brake switch. Why it stays on.
Hell, I just noticed this with my truck yesterday, but it was the left tail light staying lit up . But what's really shocking is the battery kill switch was off cause I turn it off when I'm not running sat, sun, and Monday. What could be causing this problem then?
@@juanrosariofxI have the same issue and my cruise control won’t turn on. I replaced Low brake pressure switch everyone’s talking about and didn’t help Gonna get what this guy is talking about next by my shop, I was hoping it’s a switch, but sounds like a few bucks now lol
I got a 2014 cascadia and the kill switch doesnt work its a brand new switch but wether the switch is on or off the truck turns on anyways, would the chassis controller have something to do with it? Does anyone know what the problem could be?
@@skipjackjohn6231 probably bypassed i just bought the truck, have it sitting it at home, i just bought a regular cutoff switch in the meantime till i figure out what was done
You're a good man Ryan showing everyone all different kinds of issues and how to resolve them to try and avoid going to a shop @ $160 an hour.
I had this very issue. Folks, don't ignore it like I did! It's cascading effect of problems with exterior lighting! Ultimately it was caused by water getting into the SAM chassis module, due to a missing cover that had been missing from before I bought the truck. Definitely be sure your cover is in place and tightened down
Thanks for the video. I miss the good ole days when trucks had relay circuits. Everything went downhill with all these modules. I can understand for engine control etc. but for chassis components is just ridiculous. Multiplex wiring sucks.
Good job Ryan.that saves the owner some money to
I have a fleet of Cascadias, the SAM chassis module will also quit powering a tail-light for the same reason. There is another pin on same connector that from the factor powers "side marker light" that is hooked to nothing. Move tail-light connector to that position and lights will work correctly, would have to look up pin position but it has worked for years and for free, minus labor of course!
Do you know which connector
My truck done exact same thing & that was the problem, I have a 2016 Cascadia
While I've never had it happen to me, I've seen it numerous times at the truckstops and wondered what was going on with it. Now I know.
Tanks Ryan good video
to unlock the connector you use air blow gun on the lock channel and then wd 40
Make more content like this 👍👍
i had this same problem people . What happens water gets in the Sam chassis and damage it and cause your tail light to stay on when truck is turned off. Get this fix ASAP if not it will cause other problem. The Sam chassis is like a house window with caulking around it after time the caulking disintegrate and water gets in and cause that to happen. You can take it out your truck yourself bring it to dealership buy new one put it back in your truck then bring it to dealership to program it. You let them take it out and install it you gonna pay more money and for programing .
You just have to swap it out. No programming needed. Also they are $950 now with core exchange. Freightliner dealership informed Me they are no longer doing reman. Before trading in your sam module clean it up makesure no burn marks. Dealer will reject it.
This is just a side note to add. I gave freightliner a non working module from the junk yard and opened my original. I was able to clean all the areas that had corrosion, and I used a soldier iron to heat up those contacts. I removed the new sam module and reinstalled my original, and it's working. Still keeping replacement stored under bunk.
Thanks for the tip!!
2018 kw with Cummins x15 similar issue thank you
where is that module located on a 2005 international 9900?
Great video 👍🏼👍🏼
Battery cut off switch for $20 until you can save enough pesos for the big fix....lol
I've been having a low voltage disconnect and I've also been having the same problem could those two be related?
What pgm do you need to program it
If You have to replce SAM chassy I would check my windsheld for water leak.
Off the topic question for you sir… why don’t you see semi trucks with electric fans??
Can brake light switch cause this?
Can that sam chassis also affect a non working reverse lamp on a 2015 cascadia? I've already checked the usual suspects, with still no resolution
For reverse light is a valve on top the of gear box
That happens to the 2024 freightliners. Every now and then when i go to shut the truck off that right light stays on just tap the brakes before u shut the battery kill switch on. Think thats hooked up to the brake switch. Why it stays on.
I have the kill switch on battery. And I’m having the same issue. Did you get it fix ?
Hell, I just noticed this with my truck yesterday, but it was the left tail light staying lit up . But what's really shocking is the battery kill switch was off cause I turn it off when I'm not running sat, sun, and Monday. What could be causing this problem then?
Did u get it fix? I’m having the same problem
@@juanrosariofxI have the same issue and my cruise control won’t turn on. I replaced Low brake pressure switch everyone’s talking about and didn’t help
Gonna get what this guy is talking about next by my shop, I was hoping it’s a switch, but sounds like a few bucks now lol
What if my tail lights only work when pressing the break or using the blinkers but lights aren't on
I got a 2014 cascadia and the kill switch doesnt work its a brand new switch but wether the switch is on or off the truck turns on anyways, would the chassis controller have something to do with it? Does anyone know what the problem could be?
@@skipjackjohn6231 probably bypassed i just bought the truck, have it sitting it at home, i just bought a regular cutoff switch in the meantime till i figure out what was done
They got it from arrow just like i did thats why 🤣🤣🤣
Crap -cadia