If the sliding door on your van is hard to open and close or if it feels like the door of your van is stuck when you open and close it you can fix the stuc.
Vw t4 sliding door adjustment.
In this short video i not only swap over a vw t4 sliding door but i also cover how you can adjust the alignment of your sliding door if it does not line up from the outside or if you can see light.
In this video i replace the middle roller of a vw t4 transporter see description for links to rollers.
Then swing open the door 45 degrees.
This video explains how this works.
It was in the upper of the two harnesses on the bulkhead above the air filter if you pull back the outer sleave and check the thin black white wire for a break i think you will find your problem.
If the door of your vw doesn t sit flush with the car body the door buffer needs adjustment.
First slide the door all the way back until it hits the rubber stops.
Brief explanatory video of what to address to maintain a sliding door on a vw bay window bus.
Vw transporter t4 hi had the same problem just found the fault it was a brcken wire causing relay109 to drop out.