yes .... best not to have the 12v vehicle running, and don't leave them hooked up any longer than necessary to do the job - if there's a problem, it'll more likely be with the new computerized vehicle wink

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 & Rust-a-holics Unanimous parking lot