[windcalmer]

I am working on my grandfathers 1993 DeVille and this one part keeps turning on every so often when the car is off and has been for quite some time. It will run for a few seconds and then turn off. It will happen 10 seconds after you turn off the car or sometimes it will be 10 hours, totally random. Trouble is his batery keeps getting charged down and I dont know what this part is. Here are some pictures of the part. I hope someone knows what this thing is. Also there is no part number or anything stamped, written, or stickered to the part. Thanks for the help if you can.

Again thanks in advance if you know what this part is.

 

[Ranger]

That is the ELC (electronic level control) compressor. It is turning on because there is an air leak somewhere at the rear shock or the air line and the shocks leak down. Then the level sensor detects that the rear end is low and pumps it back up again and the cycle continues.

 

[windcalmer]

Thank you Ranger. Many of the posts that Ihave read say that your answers and advice should be take as fact, so I am glad to get a reply from you. I had a hunch that that is what it was, but my grandfather didn't seem to think so. I will let you know how it turns out once I fix the leak.

 

[Ranger]

Thank you Ranger. Many of the posts that Ihave read say that your answers and advice should be take as fact, so I am glad to get a reply from you.

Well, not always. I have been wrong before, but we won't tell my wife or daughters now will we. My daughters grew up thinking that "I was only wrong once. That's when I thought I was wrong".

Spray all the air line connections with soapy water and watch for bubbles to aid in finding the leak.

 

[windcalmer]

Ranger, I founnd one leak today but am having trouble tracing the lines back from the rear to the front of the car. Do you know where I can find a routing diagram or something of the like? Thanks again for all the help.

 

[Ranger]

FSM is the only place I can think of. My guess is that the line runs along the drivers side to the rear, being that the compressor is on that side.

 

[windcalmer]

FSM is the only place I can think of.

Not to be dumb, but what is FSM?

 

[Ranger]

Factory Service Manual