Once this is fixed, I would write a '"nice" letter to the dealership owner, explain all that happened and included a copy of the Magnuson-Moss Warranty Act, this act was put into place to protect the consumer (also the car makers/dealerships/warranty companies) trying to get warranty work done. If the unit was Ford factory installed and you are still under warranty. It will apply. They have to prove an aftermarket part or the instillation of it is the cause. If that dealership is losing business, it's because of the scripted words the Service Manger used.
Document all your findings. make a copy of what you send to the dealership owner. Explain to him or her that you just felt they needed to know how one customer was treated and if one was..then probably others have been too and you felt as a customer he or she had a right to know how just one customer was treated.
I know dealerships that don't mind after market parts at all, They will service the vehicle under warranty with no issues, if there is a warranty in place. The problem now days with Ford (and I am sure other makers) and warranty work, is IF the dealership has an excess of warranty work done...Ford may have a cap, if you will, placed on the dealership that may limit them from getting warranty work paid. then again, I know dealerships that have lost tons of warranty work money of things that were not covered...and paid it themselves JUST SO THE CUSTOMER WAS SERVICED AND HAPPY...BECAUSEi] those dealerships understand what quality service is all about and want repeat business.[/i] And guess what?...So far, that idea is working well even in today's auto market for those particular dealerships!
I m a g i n e THAT?!?!
if you don't do any of the above Cool...but at least after you place them on the report card list here. Drop off that part of the site web link to the owner so at least he can read it. They need to know WHY they are losing business. or why you lost faith in them at the very least. The Owner probably don't even know what is going on.