yes a 43 would be 6v - if the lights are actually 8v rated, 6v would still light them, just dimmer, sounds like you have a wiring problem or a bad switch

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot