'96 9000 CSE Headlights

With contact and light switch on (and lights not working), wiggle the relay, see what happens.

I had a few problems getting cheapo replacement bulbs to seat properly but that's unlikely to be the cause of a total lights-out. I guess it's more likely to be the relay or switch, but don't rule out badly seated bulbs. Perhaps you'd tell us what you find?

Does it matter if you try to switch between high beam and low beam? There are two relays in the path of the power source for both of the headlights. They are the Headlamp relay and the Headlight Dip relay. After that they spliot and go through seperate fuses so the symptom would be single sided.

This is a classic symptom on the 9000's. The solder joint on the relay cracked due to restrcition to thermal expansion. Pull the headlight relay out. Carefully pry the internal out of its housing and examine the solder joints with a magnifying glass. Sometimes you don't need a magnifying glass. Reflow the solder joint and it should go back to normal.