Hello, this is my first thread. I'v been a mechanic for 30 year's and i have a buddy that had a 94 concorse. The problem is the service air ride light comes on. He just bought the car and the previous owner also had the problem. But after he had the car into a shop, now the light doesn't come on. I'v checked the fuses under the hood and in the trunk and there all ok. The suspension does not levil the car and i'd like some input on how to trouble shoot the system. I'v read some pervious thread's here and know about disabling the service indicator after installing Passive Strut's. My buddy want's to repair this air ride on his car. I'v found the air compressor, above the axle by the right rear tire and there 4 wires run to it. I think i found the levil sensor's. No linkage to them, so they may be like a mercury switch in them. I'm pretty green on this system and if anyone has any input on this it will be helpfull. Also does anyone know where i can get a repair manual on this car, i'v herd of a helm manual is good. But i don't know how good they are, but they got to be better than the repair manual's from auto zone or checker's. I'd also like to find a owner's manual as well. Tks Scott