Water in rear corners of regular cab

[Bluebird]

'93-reg. Cab, rain water is collecting in the rear corners of the cab. Where could it be getting in? Thanks to all who help my rig dry-up
Patrick

 

[dodgenstein]

First place I would look is the cargo light.

 

[cerberusiam]

If you have a rear sliders make sure the weep hole sin the channel are clear or it will buildup and leak thru the gasket. Also check the cab pressure release vents to see that they are sealed and not stuck open.

 

[Bluebird]

What and where are pressure relief caps?
Happy Christmastime,

 

[cerberusiam]

Bases of the cab on each rear corner to the back. Lille plastic flappers to equalize cab pressure when the door is closed.