When I turn on the lights the doors close and when I shut them off the headlight doors open!

Where do I start?

Thx

The vacuum lines are reversed.

diaphragm

I bet if you reversed the lines at the front vacuum motors it would be fixed.

Thanks Rick!

That was a huge help!

I switched the two lines and it works better
Before, the pressure was keeping doors down when lights were on...
now doors open or partially open and the one closes and the other closes sometimes.

I'll have to check the hoses for leaks I think.

Thanks again!