Have a problem with headlights cutting out.  Getting a new switch. The
switch for the '90-91 vans is different from earlier models I've learned.
More expensive too. THE EARLIER ONES AR 8 PIN, THE NEWER ONES ARE 10 PIN.
Something to watch out for. I'M going to put  Jay Brown's relay kit in when
I replace it. From earlier experience, I found trying to mount them below
the dash on the left side as instructed was a real PITA. They didn't want
to stay put.  I found I could mount them on the metal on the side of the
switch under the dash pod cover. Easy access.