tilt intermitantly stops working both up and down..but if I hold tilt switch up or down underway after a while it works normally again. Cleaned all connectors, battery, control box, solenoids but still happens. When it fails I can hear up & dwn solenoids clicking but motor does not work. This is a 3 wire 3 ram setup,Can I jump blk to(-) and blue or green directly to (+) to test? If it is the motor can I just buy motor ? where ? I have a chance to buy a complete newer used merc tilt setup for good price, mine has a fill tube in resevoir and newer one does not, rest looks same, are they interchangable ?