Charles, I think you'll find that wiring diagram [bottom of page] shows the fog light connection at the light switch is a "pigtail" that probably activates the tail lights, not cut them off, so they can be used without the main lights on .... also, the park lights are not on when the headlights are on, unless you make a modification as shown in this tech tip

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