I too need some help, I did not build my plane.
All lights that go through my dimmer surge during flight. I started with the grounding of the system and it appears to be good.
Next, and where I am now, I pulled the dimmer back from the panel. I believe it to be the Vans kit.
Based on the diagram above it is wired like this,
1- Ground
2- daisy chained to all switches
3- dimmer to lights
4- positive
1 and 2 have a diode jumper across them. It is broken.
I fell the the switches aren’t properly grounded.
Any advice?
Can I put in a 3 lug dimmer and take the switch grounds direct to ground?
Any help is greatly appreciated,
Jeff