Wet Cab Floor Drivers Side

[Keith Knight]

Working on a 2003 M1079A1 with gen 2 AC. The drivers side floor where your feet are is always damp between the spray in bed liner and the fitted floor mat, same as original just black. Some times it's more wet than other times, but never consistent with rain. Today I decided to find the problem pulled the throttle pedal out the left kick panel and pulled the mat up so I can see where the water is coming from. After a couple hours running the water hose starting at the lowest possible place water could enter if there was a bad seal or gasket. Working my way slowly higher each time then observing the interior for water. Never finding any water frustrated I hooked the hose up to the roof so water was running down the entire drivers area for 30 minutes still nothing on the inside. Then my thought changes to it must be the air conditioner not draining properly. Poured a half a gallon of water into the AC drain pan quite rapidly, and it drained properly so fast when I looked there was not any water in the pan. Next I figured maybe a small gap between the AC drain pan and the cab floor, tipped the cab and its sealed up tight. Next was the thought of maybe behind the CTIS controller where there isn't a pan that maybe some condensation is getting into that area. Poured a couple cups of water into that area and still nothing. Which is weird because I can't see were that water went even. It disappeared towards the front beyond where I can see and that area the corners are open. I even jacked the passenger side up a little so, still nothing.

So after say all that I have run out of ideas and hoping someone here has had this problem and solved it.
Any and all of thoughts and advise is welcome. I'm determined to find the problem before i put it all back together.
Thanks

 

[coachgeo]

Working on a 2003 M1079A1 with gen 2 AC. The drivers side floor where your feet are is always damp between the spray in bed liner and the fitted floor mat, same as original just black. Some times it's more wet than other times, but never consistent with rain. Today I decided to find the problem pulled the throttle pedal out the left kick panel and pulled the mat up so I can see where the water is coming from. After a couple hours running the water hose starting at the lowest possible place water could enter if there was a bad seal or gasket. Working my way slowly higher each time then observing the interior for water. Never finding any water frustrated I hooked the hose up to the roof so water was running down the entire drivers area for 30 minutes still nothing on the inside. Then my thought changes to it must be the air conditioner not draining properly. Poured a half a gallon of water into the AC drain pan quite rapidly, and it drained properly so fast when I looked there was not any water in the pan. Next I figured maybe a small gap between the AC drain pan and the cab floor, tipped the cab and its sealed up tight. Next was the thought of maybe behind the CTIS controller where there isn't a pan that maybe some condensation is getting into that area. Poured a couple cups of water into that area and still nothing. Which is weird because I can't see were that water went even. It disappeared towards the front beyond where I can see and that area the corners are open. I even jacked the passenger side up a little so, still nothing.

So after say all that I have run out of ideas and hoping someone here has had this problem and solved it.
Any and all of thoughts and advise is welcome. I'm determined to find the problem before i put it all back together.
Thanks

Well since your eliminating all possibilities ..... Wear Depends for a while?

 

[coachgeo]

....

So after say all that I have run out of ideas and hoping someone here has had this problem and solved it.
Any and all of thoughts and advise is welcome. I'm determined to find the problem before i put it all back together.
Thanks

could it be only getting pushed in by pressure..... aka driving in rain? maybe try a water hose jet cleaning wand...... especially on the over windshield marker lights.... and similar?

 

[Keith Knight]

Thank Ron I’ll get the Walmart brand!
I tried that first with the hose spray nozzle spraying each area that I could possibly enter the vehicle. I didn’t as far as pressure washer but I’m not driving into the wind through a hurricane. But maybe I should go there next.

 

[Keith Knight]

It just rained 2.5" in less than 30 minutes and still dry.......Still dry!

 

[Keith Knight]

Well I hate to admit it but I'm calling defeat after spending a few more hours trying to figure out where the water is coming from! This morning I researched what the back of the gen 2 AC looks like and I found that the area behind the CTIS all the way forward, the part you can't see is actually flush, no lip which allows water to flow right out the back side and the water finds a couple holes in the body and drains out behind the front grill down the radiator. So I can only assume it only happens when all the planets come in alignment. Maybe while going up hill while running the AC in a high humidity environment.
Any ways thanks for your thoughts maybe one day someone else will solve the mystery or Ill happen to catch it and observe it.

 

[Third From Texas]

Well I hate to admit it but I'm calling defeat after spending a few more hours trying to figure out where the water is coming from! This morning I researched what the back of the gen 2 AC looks like and I found that the area behind the CTIS all the way forward, the part you can't see is actually flush, no lip which allows water to flow right out the back side and the water finds a couple holes in the body and drains out behind the front grill down the radiator. So I can only assume it only happens when all the planets come in alignment. Maybe while going up hill while running the AC in a high humidity environment.
Any ways thanks for your thoughts maybe one day someone else will solve the mystery or Ill happen to catch it and observe it.

It's not windshield wiper fluid, is it?

 

[Keith Knight]

No, I’ve only used it once or twice. Mostly because I hand wash the windshield every morning before we drive when it’s buggy out.