turn the ignition on and fuel pump not engaging. Fuses are fine. I am using a ThunderMax ECM. When I checked the codes these came up
U 1016
b 1007
b 1006
b 1007
b 1005
Where do I go from here?

 

Fuel pump relay could have a bad or dirty connection. If not, it's a standard relay you can get at an auto parts store cheap.

 

Here are the codes if you don't already have them.

U1016 Loss of ECM Serial Data
B1005 Fuel Level Sending Unit High/Open Instruments
B1006 Accessory Line Overvoltage Instruments
B1007 Ignition Line Overvoltage Instruments

Did you just install the Thundermax? From the looks of this combination the ECM, at the very least, needs to be reflashed and hope that the lost control data didn't zap the fuel sending unit and is instead only getting bad info so it's not operating.