phatton Posted August 9, 2018 Share Posted August 9, 2018 I charged the AC on my 1990 Comanche. Finally enjoying good cooling and noticed that my passenger side carpet is soaked. I pulled the seat and carpet and discovered water coming in passenger side next to the left mounting bolt on heater box. I'm pretty sure that the heater/ evaporator drain is plugged. The problem is that I can not find the drain hole anywhere on the firewall. Where is it? Thanks. Link to comment Share on other sites More sharing options...
87MJTIM Posted August 9, 2018 Share Posted August 9, 2018 It's on the firewall just to the right and below the blower. Link to comment Share on other sites More sharing options...
Eagle Posted August 9, 2018 Share Posted August 9, 2018 I just went through this with my 2000 XJ. Follow the top of the passenger side "frame" rail (ear) back to the firewall. The drain comes out just above the frame rail, and there should be a stub of a drain tube that follows along the top of the rail for a couple of inches. Cruiser sent me a photo of what the drain tube looks like on the early ones, viewed from underneath. The 2000 didn't extend down, and wasn't visible at all from underneath. Link to comment Share on other sites More sharing options...
phatton Posted August 10, 2018 Author Share Posted August 10, 2018 I just checked my truck. There is a rubber hose connected to the bottom of the blower fan housing going into the firewall. Is this the drain hose? If so should it be connected to the blower housing? Thanks Link to comment Share on other sites More sharing options...
Eagle Posted August 10, 2018 Share Posted August 10, 2018 2 minutes ago, phatton said: I just checked my truck. There is a rubber hose connected to the bottom of the blower fan housing going into the firewall. Is this the drain hose? If so should it be connected to the blower housing? Thanks That's not it. Farther down, almost in contact with the flat top surface of the frame rail/ear. Link to comment Share on other sites More sharing options...
phatton Posted August 12, 2018 Author Share Posted August 12, 2018 Found it - thanks Link to comment Share on other sites More sharing options...
WahooSteeler Posted August 13, 2018 Share Posted August 13, 2018 On 8/10/2018 at 10:47 AM, phatton said: I just checked my truck. There is a rubber hose connected to the bottom of the blower fan housing going into the firewall. Is this the drain hose? If so should it be connected to the blower housing? Thanks fyi, that is to allow air from the squirrel cage to blow back in to the blower motor to help keep it cool. Link to comment Share on other sites More sharing options...
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