you may have another bad one then
do you have another truck to test it in?
if not call the distributor back and tell them whats wrong, this may be a known issue and they may have to send you another one.
One thing i've learned about rebuilt components, its a 50/50 gamble on how it will perform, sometimes they work fine, other times they are not.

One of the biggest problems with electronic components that are rebuilt or refurbished is they do not load test them under normal conditions like they would be in out in the field, they have a computer program or a test station that does a static test for functionality so sometimes these kind of problems do not show up until installed on a truck.