trailer brake module fault. on 2010 Ford F-350 Super Duty

First truck had no dash rpm,no gear selection,but I put in reverse and backed out.truck was in low gear.started to dealership then all the sudden everthing worked. took to ford next day they said trailer brake module was shot $1200.00 holy shit truck only has 56000 kms.

Asked by for the 2010 Ford F-350 Super Duty
You don't have to replace it with a brand new, they can be found used and there are some companies starting to rebuild them. Here is one on E-Bay.
Thank you is it hard to get had cover of dash off I can handle that. Is there a how to anywhere.