yes, they'll draw more current than the stock type, although that won't have any effect on the dash light portion of the switch and if your wiring is new and sound a relay isn't really vital. especially if it's not a daily [nightly] driver
"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
