switched by what? the ignition switch? if they're fused at the ammeter [not ampmeter, Stuart], and have their own switched, they should not go thru the ign sw
"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