When I purchased my 88 Westy the power locks did not work in the passenger
door and the rear hatch. My problem was broken wires. Check for power at the
lock motor wires. I have found many elecrical problems caused by the wires
being too short. Over time they stress and break. The rear hatch wires go
above the sink and stove. When I dug mine out they were broken at a
connector from being stretched too tight.
Bob Wing