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Ask Ron Your Own Question
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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2012 ford expedition. Check air suspension warning is on

Customer Question

2012 ford expedition. Check air suspension warning is on intermittently. Truck is down in the rear. System check may say air suspension is okay, or to check it. it is not consistent.
JA: How has the ride been lately? Have you noticed any fluid under the car?
Customer: No fluid, just the rear is down. Any ide where the air compressor is located?
JA: Are you fixing your Expedition yourself? What have you tried so far?
Customer: All fuses (10, 19, and 48 listed are good. I jumped relay #10 with no result. I don't have a schematic for the 2012 Expedition. I'm am electrical engineer so I don't have problems with electro-mechanical issues. However, I don't have anything to work from. Today we're due for 7 inches of snow so I wanted to be able to move it. If I can't diagnosis it today it will be at the Ford dealer on Tuesday. Tuesday is the earliest appointment at my four local Ford dealers.
JA: Anything else you want the mechanic to know before I connect you?
Customer: no.
Submitted: 6 months ago.
Category: Ford
Expert:  david craig replied 6 months ago.

Hi Im David, thanks for visiting the site. let me get you the location and schematics that you need

Expert:  david craig replied 6 months ago.
Expert:  david craig replied 6 months ago.

is there anything else i can help you with?

Expert:  david craig replied 6 months ago.

just checking in to see how its going

Customer: replied 6 months ago.
Rear is fully down. System check states "Air Suspension System Okay." Is #10 in the "Power Distribution Box" the correct relay for the RAS compressor, or is there another relay, either solid state or analog/mechanical? Is there if #10 is the only relay I've already shunted/jumped that out with no result. So, is the compressor shot or is there another control somewhere that I'm missing?I am assuming that the #10 relay closes and applies power directly to the compressor and the rest of the control circuit, including the position sensors are simply controlling the #10 relay coil. Am I correct? If correct, I've already shunted the #10 relay and therefore the problem is either the compressor, the positive feed to the compressor, or the return/negative.I need a schematic to see the whole control circuit for the RAS.
Expert:  david craig replied 6 months ago.

ok, let me work on that

Expert:  david craig replied 6 months ago.