Water leak - Oil Light when AC on - AC fan going crazy

[nashvegas]

Well... my 05 HSE got rained on for the first time since i've owned the truck (2 months now).

And when I started off today, water came pouring out one of the rear sunroofs on passenger side AND down the pass side a pillar, and the light switches up front by the mirror.

Grr... I've read alot about sunroof drains and looks like i need to tackle that.

BUT -- at same time... the OIL PRESSURE light is on whenever the AC is on (it keeps dinging and flashing on , then going off... if I leave the AC off it stays of so I'm pretty sure not a _real_ oil pressure issue, something electrical instead) and the AC fan is doing whacky things (speeding up slowing down etc).

I did pull up the black trim piece on passenger front sill and find a bunch of water (the wire bundles were sitting in water -- crap). No rust or any corrosion so I don tthink this is an issue that has been going on for a long time.

But my question is -- is this random oil pressure light and AC fan craziness the water getting into those wires.

Now -- to fix. Grr.

 

[nashvegas]

Well -- it seems like it was the water

Pulled the Pass side a-pillar, blew threw the drain line, clipped off the little star shaped end of the tube behind the "air intake" grille. I'm thinking that may have been it. I pulled up the carpet, the floor trim pieces, etc (managing I think to break a couple of clips - woops)... dried it all out with a hair dryer. Pulled down the lower glovebox too.. dried it all out. No more weird lights. I think there was water in the fuse box or something. Yikes.

I dont really think the drain tubes were completely blocked or anything... so I'm still a little mystified about this, but we'll see.

 

[nwoods]

Cool that you did it yourself. Good job!

 

[KyRover]

Like nwoods said, Good Job ! Make sure you check all four drains while your at it. I do know from personal experience that if it is raining hard enough the drains can't handle all the water.

 

[Trynian]

Yep, moisture down the passenger side can cause some shorting out.

As kyrover said clear all clip all 4. The other 3 you will need to remove the plastic wheel wells to get to them and clip them.

 

[dry_fly]

System faults

everyone might want to proactively inspect the wiring behind the a pillar. There was a series of faults which sporatically happened, which my dealer trouble shot to find a corroded splice in the wires which communicate the terrain response, suspension and hdc systems. apparently there is a known issue with LRNA but no TSB has been deployed. Apparently these were "weak" splices from the factory.

 

[mustbeaudi]

Is this weak splice issue limited to certain production dates, model years, to your knowledge?