need to determine if the gauge is 6 or 12V but if stock 54 it'd be 6 and should have the reducer .... you should be able to add indicator lights by splicing into the front light wires, that's the way the factory did it

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