It's raining pretty good here in Houston and I hit a very large patch of standing water doing about 50 MPH. Water shot up both sides of the truck at least 50 feet in the air! After the water slowed me from 50 to 10 MPH in half a second, my "Service 4WD" light came on and the electronic transfer case switch on the dash usually has a little LED light lit but now it's not lit any more. Could the blast of water underneath the truck have disconnected something or screwed up my 4WD? I will probably need 4WD to get home and it won't let me switch out of 2WD. Any suggestions or has anyone experienced this?

 

Check your power dist. box under the hood, you might have splashed water in it and popped a fuse or relay. That would be the first thing since you have no power to the 4wd switch.

 

Check the vacuum lines on top of the axel

 

You need 4wd because of rain??

 

No, he drove through the water in 2wd, and is afraid he screwed something up with the 4WD system...

 

I suppose it's possible that a harness isn't making good connection underneath somewhere. Either way, it pretty much has to be electrical. Maybe the best option is to take it into the dealer under warranty. Either way, please post what the solution is because I'm sure that this will be valuable information for others that visit this site! Good Luck!

 

I will probably need 4WD to get home and it won't let me switch out of 2WD


Oh.... Silly me, I thought this sentence meant that he needed 4wd to get home.
So I wondered if that meant part of his trip was off road or muddy or whatever.

 

The all weather connectors shouldn't allow any moisture to enter even when submerged, and it'd be hard to splash water into the PDC, but check all the fuses anyway. Maybe when the truck dries out the LED will come back.

 

Insult removed by Admin

 

No need to engage in personal attacks because you either did not read or understand the original post and subsequent inquiry.

 

Just ammazing isn't it..........?


A guy doesn't even read a post or doesn't have basic comprehension of the english language. You politely point out a simple mistake and yet they are still so ignorant as to make reproachful comments......

 

Digital Bullet can only hope to improve....

 

Nobody laughs anymore?

Wow, its the internet, settle down...



Besides, I can only hope to improve...

 

I thought the newer rams didn't have the vacuum thing on the axle?

 

Some of the sencond gens do. Some had vaccum operated CAD, IIRC.