A couple of months ago, while extending our Power Gear Leveling Jacks, the Jacks down light did not light, but the jacks went down OK. When we were ready to leave our location, and we raised the jacks, they only came up about 2/3 of the way. I ran them back down a bit, then raised them again and got them to come up all the way. We returned home without further incident.
Determined to get to the bottom of this problem, I started the following procedure to find the problem.
With this information, I removed the control module, removed its cover, and then the circuit board. One corner of the circuit board where the hydraulic control wire connector connects was badly corroded, and the brown wire circuit and post were corroded away. After tracing the circuitry on the board I found a location where I could solder a jumper wire to replace the corroded post. Once repaired all systems worked as they are supposed to work. This also means the alarm circuit is only activated when the Jacks Down (Brown) wire is energized by lowering the Jacks.
Now to find the reason for the corrosion. It turns out the AC duct work passes right over the leveling control module. When using the Dash Air, condensation from the AC duct dripped down onto the hydraulic connector wires eventually causing the failure. The solution was to fabricate a protection disc to slide over the wires and cause any condensation to fall harmlessly onto the floor where it evaporates without causing further damage. The following PICs illustrate the location of the control module with and without the protection disc.
Submitted by Jim Fox
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