Otto, The dash lights are usually all tied together to one wire going to headlight switch. The fact they are ALL out tells us that. They will either by splice, junction block or by previous owner method. Just follow them to discover. BE SURE YOU DON"T have the dimming knob turned all the way to off.
At the same time find the terminal on the headlight switch that is for dash and see that is is hot when dash lights are activated, knob rotated, whatever. You can also follow that wire from that end to discover how they are all tied.
The chance are the H/L wire end is off or you don't have the dash metal grounded good enought or you don't have any ground becase the dash is loose while you are working on it. Each bulb socket needs to have good ground contact in the hole.
You can tap a hot jumper on the H/L end to see if bulbs light. This will confirm wiring continuity and will confirm ground.
Last edited by bartamos; 10/31/2024 6:47 AM. Reason: clarification
