I looked up your 1996 Contour OBDII codes at www.actron.com

I assumed it's P in front of the numbers

P743 TCC Elect
P750 Shift A malfunction
P755 Shift B malfunction
P1747 Pres Cntrl SolA Ckt Shorted

Transmission troubles , maybe some wiring harness troubles? Take a look at wiring, battery. Maybe you will be lucky and find something dumb (I had found cut wires on my Dodge's fuel pump once, a small furry creature must have been hungry).