: Auto Level Help. Sagging rear with trailer conected.



iMotion
08-10-11, 03:32 PM
I just picked up a new trailer yesterdays and noticed that the rear sags. My other trailers are smaller and have a lot of the weight balanced over the axle so there's not much weight on the truck's tow hitch.

This new trailer is a lot bigger and has more weight pushing on the hitch.

When i start my truck i can hear the air compressor kick on for a few seconds but the truck only rises maybe a 1/4 inch. I still have a lot of sag.

Any suggestions on trouble shooting or what to do?

http://img.photobucket.com/albums/v730/DisBoiQuoc/Escalade%20EXT/IMG_7649.jpg
http://img.photobucket.com/albums/v730/DisBoiQuoc/Escalade%20EXT/IMG_7650.jpg

08EXTWhiteDiamond
08-10-11, 06:19 PM
Yeah...my 08 does the same. I have tried to get an answer with no luck. What I do is turn the key on and after 10 seconds the compressor will run for 5 second then a short vent. Next, turn the key off and back on again - in 10 seconds the pump will start for again 5 seconds. I have to do this 3 times then the 4th time when the vehicle is level the pump won't start after the 10 seconds and I am good to go. I can not get the answer why the pump won't stay on until the vehicle is level. I have even disconnected the air line to one of the shocks to see if the pump would run longer - no just 5 seconds. Good luck I hope you get the issue solved.

iMotion
08-11-11, 01:39 PM
Yeah...my 08 does the same. I have tried to get an answer with no luck. What I do is turn the key on and after 10 seconds the compressor will run for 5 second then a short vent. Next, turn the key off and back on again - in 10 seconds the pump will start for again 5 seconds. I have to do this 3 times then the 4th time when the vehicle is level the pump won't start after the 10 seconds and I am good to go. I can not get the answer why the pump won't stay on until the vehicle is level. I have even disconnected the air line to one of the shocks to see if the pump would run longer - no just 5 seconds. Good luck I hope you get the issue solved.

Thank you... taking a few minutes to do that is a lot better then sagging in the rear. I wonder if there's a way to manually over ride the air compressor so you can keep it running longer.

08EXTWhiteDiamond
08-11-11, 03:50 PM
Yes, there is a relay for the compressor under the hood you can bypass and run the compressor as long as you want.
I don't understand why the system won't run the compressor until the vehicle is level.

B.T.W. the system will vent properly when the trailer is disconnected.

Check out the following in 2006 EXT forum: "Answer the 1Million Question: Where is the air ride control relay located?"

iMotion
08-11-11, 07:16 PM
Did you do this mod to bypass your relay?

08EXTWhiteDiamond
08-11-11, 07:27 PM
I used a jumper wire to bypass the relay just to verify the compressor was okay.
I prefer to let the auto level work as is and just use the key on-off method when I add a lot of weight.

I talked to the dealer about the issue and his reply was quote "If there is no warnig message in the dash then it is working fine" - yeah right!

iMotion
08-15-11, 04:55 PM
I might have a problem now. A few days ago i hooked up the trailer and the Air compressor kicks in a few seconds after i start my truck and turns off after a few seconds. Repeat until truck is leveled.

Yesterday i hooked up the trailer and loaded it up with toys. Now the air compressor doesn't turn on at all and I'm sagging a lot more then before.

http://img.photobucket.com/albums/v730/DisBoiQuoc/Escalade%20EXT/IMG_7731.jpg
http://img.photobucket.com/albums/v730/DisBoiQuoc/Escalade%20EXT/IMG_7734.jpg
http://img.photobucket.com/albums/v730/DisBoiQuoc/Escalade%20EXT/IMG_7736.jpg

McGowansix
08-15-11, 06:35 PM
I know it's not common on trailers of this style, but you could look at a weight distributing hitch. Those transfer/distribute some of that tongue weight forward to the axles of the vehicle and would help to level your vehicle. You should talk to a professional, though, and make sure that the tongue weight is not too light for a weight distributing setup.

Coop
08-16-11, 01:22 AM
Have you tried leaving the truck running while you hook up the trailer? It might help because the system will be active when the weight hits it.