got a 97 Bonneville. got a digital display that wont come on at all but all the press buttons are lit up like its getting power. no heat or ac without this unit working. went and got another from a 95 that looked exactly the same. I installed it and the same thing again, buttons lit up but digital ...

my 97 bonniville heater display worked fine turned ca off got back in and heater digital screen is diplaying 3 lines no info on display and now will not turn on at all