My vehicle (1990 Westfalia) went in for state safety inspection and the 
headlights suddenly were not working. I wired up a setup that has 
worked well with the standard automotive relays as has been done many 
times by others using the standard wiring plan. I checked all the 
wiring and had good grounds and power to each of the relays. I had a 
spare headlight switch and tried that and nothing changed. All fuses 
are good also. The parking lights come on and the dash lights work 
okay. I can see where the wiring got hot at the relays where an 
unisulated portion may have grounded on something. Since both lights 
are out on hi and low beams I am thinking that maybe the dimmer switch 
got fried. Is there an easy way to test this or does anyone else have 
any suggestions? I think it highly unlikely that both relays would fail 
together. Thanks listees.

David Clarkson