Solenoid Function Issue

[barf]

They must vary from truck to truck. On mine, the left one

Position 1, 2506713C91, A Horn, is obviously the air horn

Position 2, 2506712C91, Air Susp A, \ one of these is for dumping the
Position 3, 2506712C91, Air Susp B, / air suspension. I haven't figured it out yet,
but replacing that 3 way thing fixed my air leak

Position 4, 2506711C91, DCLD, I believe is for the rear axle locker (not PDL) because when the
module is unplugged my rear diff lock switch light blinks.



The local Int'l stealer told me that these modules can be replaced individually. The 2506712C91 was $113 CDN. I hate to think how much the entire unit is worth, but I have to figure out how to get the main supply push air connector to not leak.