I`ll give you the same advice for your wifes van. Keep it simple!!!!! That has allways been good advice for me. We tend to make things harder than they are. Hence, Check air psi, tighten gear box, then tear into ( trouble shoot)the brakes if you have to. To me that is common knowledge and part of the process of discovery. To me that`s not guessing that`s processing data. 2 penny`s worth from me!!! Remmember i`m certainaly not the brightest bulb in the lamp.I Just try to be consistant.
Slider in WA.