Medium to heavy duty trucks like your 2012 International TerraStar can have a different kind of 7-Way trailer connector on them than what RVs and other passenger vehicles have which could be what that 08HAG Electric Trailer Brake/Lighting Separate is indicating. Basically the functions of the pins in the connectors are different. A lot of times in these situations we recommend adding a second 7-Way to the truck that is pinned out the regular RV way, see picture.
What could be happening... view full answer...
Go To Results