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Jump Seat to Console Swap power fault problem - need help

bobthemagicman

bobthemagicman

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Ok, so I am hoping someone on here might be able to assist me. Full disclosure, I do stupid **** sometimes. I was doing my swap from jump seat to console (19 Ram 2500 Laramie) and while I had disconnected the battery previously during the install I forgot I plugged it back in to get my step to come down. I wasn't thinking and jumped back into it and one of the USB cables touched the CD player. I was shocked (pun intended) to see it spark because USB shouldn't carry power on the outside metal connector. Regardless, I blew 2 fuses, f65 and f66. After replacing these my inverter outlets have come back but the data connection seems to be dead and the computer is throwing a handful of faults. I don't have them all off hand but here is what I can recall:

I am a software geek so I understand the sensitivity of these systems. The U1045 is likely the main issue here. I am pretty sure when I shorted the USB I damaged the LIN 3 Bus. The question is have any of you run into this? How did you repair it if so? Or does anyone have any diagnostic suggestions. I understand what the LIN bus is and am guessing I blew out the network routing circuit when it shorted to ground. This would bey why none of those modules are communicating with the main CAN-bus but are still functional. Any suggestions are appreciated as I do not want to do the walk of shame into the stealership.
 
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Sounds like it sent the shock through the radio. Might be a long shot but wonder if there is a fuse located somewhere on the radio brain behind the screen ( on the board) seeing as how this board controls a lot it wouldnt supprise me...
 
I think there is a fuse on the firewall on the passenger side. Not sure that knowing that helps any.


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JustARam22 said:
Sounds like it sent the shock through the radio. Might be a long shot but wonder if there is a fuse located somewhere on the radio brain behind the screen ( on the board) seeing as how this board controls a lot it wouldnt supprise me...
Click to expand...
I took the screen off and didn't see anything accessible on the screen unit or what I believe is either the brain or the amp behind it. Are you suggesting I disassemble the screen or the "amp" in order to access the board directly to look for a fuse? I do suppose this would allow me to observe the board for any blown capacitors or resisters that may not have handeled the zap well.

Gus said:
I think there is a fuse on the firewall on the passenger side. Not sure that knowing that helps any.


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Click to expand...
Any advice on how to find this one? I saw a number of other threads that indicated there is a fuse on the pass side in the 6.7 but I will be damned if I can find it.

In other news, I did find a video that talked about there being 2 additional hidden fuses under the fuse box which I was able to find and test but both are fine. I appreciate the help!
 
As long as you feel comfortable opening up the brain. It could be a board level issue at this point.
 
bobthemagicman said:
I took the screen off and didn't see anything accessible on the screen unit or what I believe is either the brain or the amp behind it. Are you suggesting I disassemble the screen or the "amp" in order to access the board directly to look for a fuse? I do suppose this would allow me to observe the board for any blown capacitors or resisters that may not have handeled the zap well.


Any advice on how to find this one? I saw a number of other threads that indicated there is a fuse on the pass side in the 6.7 but I will be damned if I can find it.

In other news, I did find a video that talked about there being 2 additional hidden fuses under the fuse box which I was able to find and test but both are fine. I appreciate the help!
Click to expand...

To the left on the firewall. Next to the coolant reservoir
e7469cca606d332e979c3216b544862a.jpg

.


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Gus said:
To the left on the firewall. Next to the coolant reservoir
e7469cca606d332e979c3216b544862a.jpg

.


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Click to expand...
I think they may have changed this in the Gen 4.5s. My passenger coolant reservoir looks very different. :( Thanks for sending the photo though, that was helpful. Not sure if it's helpful my truck has the factory equipped dual battery setup.
 
Seems there was a change. The one I have on the firewall was replaced by the two you checked under the fuse box. Sorry I couldn’t be more help.


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Welp, cost me $300 and a trip to the dealer but shamefully it was just a cut wire. I guess I pulled too hard on the wire harness at some point. I figured I would post in case anyone was curious.
 
Always appreciated to get a follow up and a conclusion to your issues. Glad you got it sorted.
 
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