Height Sensor Operational Test

Fig. 8 Height sensor installation (typical):

1. Reset height sensor time limit accumulators as outlined in step 2 of "Systems Operational Test."
2. Raise vehicle on hoist. If frame hoist is being used, support rear axle as close as possible to the normal position when vehicle is at curb weight. This can be done by using a suitable jack or stands.
3. Disconnect link from height sensor arm.
4. Disconnect and reconnect wiring to height sensor to assure resetting the sensor time limit function.
5. Refer to image to determine the neutral position of the height sensor arm. This is the approximate trim position when the vehicle is level.
6. Move arm about 1 1/2 inches above the neutral position. There should be a 7 - 15 second delay before compressor turns on and shock absorbers start to inflate. As soon as shock absorber air springs noticeably fill, stop compressor by moving sensor arm down. Note arm position when compressor stops.
7. Move arm about 1 1/2 inches below the position where the compressor stopped. There should be a 7 - 15 second delay before shock absorbers start to deflate.