which 2 ground straps? there should be one from the battery, either to the cab or the frame or the engine, and all of those should be grounded together .... battery > cab > engine > frame is one way .... a starter bolt is a good place on the engine

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