Expedition air ride issues

[Exgmguy]

i just picked up a 2000 Expedition. A couple days ago the rear started sagging, and the "check suspension" light is on. The air compressor is not coming on like it used to.

Any pointers on where to start? I hear the relay for the compressor is located below the passenger side headlight and can be bypassed. This is where I am going to start with in the morning.

Thanks,
Rob

 

[dave89iroc]

check the the switch is on first

second, check fuses

 

[1BADAIR]

check and make the height sensor rod is still attached or flipped over

 

[Exgmguy]

All the fuses are good. I jumped the relay and the pump runs. The front raises, but the rear does not. I did not find any air leaks going to the rear.
Could the rear leveling rod be closing a solonoid for the rear air lines or something?
Hmmm.....

 

[dave89iroc]

All the fuses are good. I jumped the relay and the pump runs. The front raises, but the rear does not. I did not find any air leaks going to the rear.
Could the rear leveling rod be closing a solonoid for the rear air lines or something?
Hmmm.....

technically, not opening the fill solenoid

 

[Exgmguy]

Thanks for the help. The rear level sensor was extended, so when I manually turned on the compressor the rears would not fill. I collapsed the sensor by hand and it filled the rears. So I guess it looks like a bad level sensor, and maybe the relay.