Question about 1998 Ford Expedition

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98 expedition air shock pump by pass help is there one if so please explain the back end is down and pump is not working

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Hello, Check your fuse panel and the Airride switch in the cargo area. It is usually next to the fuelpump safety switch.

Here is how the system works. The vehicle is suppose to stay low for loading and for passengers to get in and out of the vehicle. Every opening (Doors, Rear cargo lid) has to be shut before the AirRide pump will work. Then the pump will work and level the vehicle.

For the doors, it uses the doorjam switches and there is a jam switch in the cargo area opening too! This switch may look more like the one on a refrigerator or can run off the hinge mechanism. For the most part, the door ajar warning will tell you there is a problem in the openings.

After the engine is started, a Relay will power the pump. It is probably your problem if a fuse has not blown. Check with Autozone or similar for an Airpump Relay. The Air release vent Solenoid is a different part and not your problem. If the vent Solenoid was stuck, your pump would run and the vehicle would not raise.

I hope my Solution is very helpful in fixing your Expedition. There is a Diagnostic plug which requires a better Scanner to read, but it is quick and accurate. You would have to call around for Service places having the special scanner for this job if the Relay does not fix your problem.

Posted on Apr 08, 2011

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