JoshMcMadMac
Dedicated LVC Member
Sorry it took me so long to get this up. I know that there was a thread asking about manual control of the Mark VII air suspension, but I think it got deleted in the hack. Here is the prudent information to make it work:
Look in the trunk, on the driver side, just forward of the spare tire (for those of you with the space saver spare!) You will see the wiring to the air suspension computer. This is also located just forward and below the air suspension shut off switch. There are 23 wires coming off of this harness, each with a location number and a specific color code. Below are the wires you need to be concerned with, with the color code in "main color/stripe color" format:
Right front bag valve 12 orange/red
Left front bag valve 11 light green/orange
Right rear bag valve 10 light blue/purple or black stripe
Left rear bag valve 9 purple/ light green
Vent solenoid 23 light blue/pink
Compressor 22 dark blue/yellow
In order to complete the circuit with any of these wires all you must do is ground them. So, find a solid ground in your trunk and you can wire the system from there. Splice each wire and run it to the ground position and put a switch inline. Now all you have to do is flip the switch and this will activate the particular part of the system. I have six independent switches; four are for the air bags, one for the compressor and one for the vent solenoid. For example, to add air to the front I flip the front two valve switches and the compressor switch.
Remember to turn off your air suspension computer first. You could also wire into that switch, add a seventh switch to your control, and run everything from within the cabin of the vehicle. It is relatively open to customization, so you can use whatever enclosure you with and use as many or as few switches as you like. A grasp of electronics and wiring is highly recommended for this task.
Finally, please note that this is not recommended for any air suspension that is not in prime condition. It is very likely that a system with weak air bags or compressor will be pushed to failure through the increased stress put on the system by overriding the stock computer and running the system in excess of it's normal limits. I am in no way endorsing the manual adjustment of your suspension and take no responsibility or liability for any mishaps this information may induce. <<disclaimer over>> :slam
I hope this helps. Enjoy and good luck!
Look in the trunk, on the driver side, just forward of the spare tire (for those of you with the space saver spare!) You will see the wiring to the air suspension computer. This is also located just forward and below the air suspension shut off switch. There are 23 wires coming off of this harness, each with a location number and a specific color code. Below are the wires you need to be concerned with, with the color code in "main color/stripe color" format:
Right front bag valve 12 orange/red
Left front bag valve 11 light green/orange
Right rear bag valve 10 light blue/purple or black stripe
Left rear bag valve 9 purple/ light green
Vent solenoid 23 light blue/pink
Compressor 22 dark blue/yellow
In order to complete the circuit with any of these wires all you must do is ground them. So, find a solid ground in your trunk and you can wire the system from there. Splice each wire and run it to the ground position and put a switch inline. Now all you have to do is flip the switch and this will activate the particular part of the system. I have six independent switches; four are for the air bags, one for the compressor and one for the vent solenoid. For example, to add air to the front I flip the front two valve switches and the compressor switch.
Remember to turn off your air suspension computer first. You could also wire into that switch, add a seventh switch to your control, and run everything from within the cabin of the vehicle. It is relatively open to customization, so you can use whatever enclosure you with and use as many or as few switches as you like. A grasp of electronics and wiring is highly recommended for this task.
Finally, please note that this is not recommended for any air suspension that is not in prime condition. It is very likely that a system with weak air bags or compressor will be pushed to failure through the increased stress put on the system by overriding the stock computer and running the system in excess of it's normal limits. I am in no way endorsing the manual adjustment of your suspension and take no responsibility or liability for any mishaps this information may induce. <<disclaimer over>> :slam
I hope this helps. Enjoy and good luck!
. One year ago my air susp. go down in a time of 6 month. I check the tubes and the bags. Nothing leaks. At next I check the compressor and the valves, he don't work. When I put the compressor directly on the battery, he works fine. So, I think my Mark have a problem with the air control computer.