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Sunroof Leak - Electrical Problems

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IGWright

· Premium Member
2004 Durango SLT 5.7
Joined
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137 Posts
Discussion starter · #1 ·
Hey All,

Happy Saturday Night!

Washed the beast today and had some problems after:

Sometimes when I wash, I get a puddle on the left side of the drivers foot area.
Got that today.
Cleaned it up and aimed it so the sun would get it dry.
I gather this is a result of blocked or ruptured sunroof drainage tubes:

https://dodgeforum.com/forum/2nd-gen-durango/287636-2005-durango-sunroof-drain-tubes.html

It seems there are 4, which drain to the wheels wells through a series of tubes.
(Jump in anytime if I've got any of this wrong)

Anywhoo, went to start it a couple of hours later,
and it reved up and down between 1K and 1.4K with no throttle response,
and the throttle sensor light flashing.
Tried it 3 times, no change.
Pulled the codes:

U110C-NO FUEL LEVEL BUS
U1120-Loss of Serial Communications for Class 2 Devices
U1411 - Implausible Fuel Volume Signal Received
U110E - Lost Ambient Temp Message

Since the codes seem kind of random,
I pulled the neg off the battery and waited 30 to reset the computer.
Tried again, same problem.

Here's a thread from another forum:

electrical problems caused by leaking sunroof - Dodge Durango Forum - Forums and Owners Club!

The other thought I had was moisture in around that fuse box.

I'm gonna have a more in depth look tonight.
I'll keep you posted.
 
Discussion starter · #2 ·
Okay.
So I got into the Driver's Side Fuse Box,
and found that all 3 wiring harness' were wet.
Dried them thoroughly with my shop vac and some paper towel . . .

Aaaand voila!!! She started like a champion with normal idle and throttle response.

However, when I shut it off, there was clicking under the hood.
It was going back and forth between the relay box closest to the back of the truck and somewhere in the engine,
perhaps the fuel pump?

I pulled a couple of relays and it stopped when I pulled the "Relay - Auto Shut Down" (see diagram).

I'm gonna pull the neg off the battery again in the morning and see if it isn't a computer reset problem.

Stay tuned.

Ian
:thumbsup:
 
Discussion starter · #4 ·
So as best as I can tell,
I gonna need to Reflash the PCM.

The tools for this are prohibitively expensive.
I've got a guy around the corner,
and I can get the truck there without the throttle.

Any thoughts?

Ian
 
#5 · (Edited)
Well, the TIPM is known to be a sore spot. It's that other box right next to the fuse box under the hood. Has 4 connectors on the bottom, but of course disco the battery before playing with it. May want to use electrical cleaner and dielectric grease on the plugs as well, see if that helps.

As for the sunroof, the front right drain clogged right at the inlet up top and caused extreme leakage. Clearing that fixed all my problems with that.
 
Discussion starter · #6 ·
Thank-you for jumping in.
The only reason I haven't looked beyond the Cabin box is,
that the truck was fine until I washed it.
The cabin box was wet, and the other two were dry.

I'll have a look this afternoon.
Otherwise I'll limp it over to the garage tomorrow morning.

I
 
Discussion starter · #7 ·
Just started without a problem,
then started to idle rough.

Turn it off.
Pulled and replaced all 3 junction cables in the cabin fuse box.

Started it, and the idle was back to normal with throttle response.
Cleared the codes, and re-read them, and they are now gone.

Sooooo, with cautious optimism I'm going to assume moisture to be the culprit,
and play it by ear.

I
 
#8 ·
My sunroof leak was not gradual. It was fine one day then next time we got good rain the floorboard was a lake. The drain was blocked by what looked like a spider web or cocoon or something. The very opening was blocked and that was all; it was easily removed and that was the sum total of effort I needed to put into that issue.

So if moisture is your issue with the electrical then use some dielectric grease on the connectors to try to help keep it out in the future.
 
Discussion starter · #9 ·
#10 ·
Good luck with the sunroof. Odds are it will be easy. The front two are very easy to get to. The rear two, not so much.

Just remember to disconnect the battery any time you are messing with the electrical, and especially the fuse box and especially especially the TIPM.
 
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