This is the first time I'm using 'just answer.com'. So if I understand correctly, this is additional detail
about the turn signal stick on the left side of the steering column that may help.
It was replaced about a month ago by a repair shop to solve this problem when it got to the point where the low beams did not work. Not even intermittently. (I know intermittent problems are difficult to fix, unless you've seen the particular problem several times before. I'm trying to get any ideas that might help. Especially if someone else has run into this problem before.)
The item replaced has the turn signal switch(up and down), the high beam/low beam selector switch(toward or away from dash), and the headlight/parking lights/off switch(rotate the knob on the end of the stick).
The problem did not reappear until about a week after the repair. It has been getting more frequent from once or twice a week the second week to almost every time the low beam is used in the last few days. I thought that perhaps there might be another device other then the switch and relay in the circuit. I don't have a wiring diagram for the van.
Do you know if there have been problems with the replacement switch assembly?
My guess is that the high beam indicator serves two purposes. First, to let you know the high beams are selected. Second, to let you know the low beams are not on when the headlights are on and the low beams are selected.
Modern automobile electrical devices and systems are wonderful, especially when they are working right.