I have a 2005 Grady White Marlin with twin F250 TXRD engines. I have had to replace the ignition module and one of the ECU's. Now, the twins run like thunder but there is no data reading on any of the guages. None on the tacs or any other. I have tried to figure it out but have run out of options.

Intermittently, there is a reading on the fuel guage but it is not steady. Any ideas????? It would help if I hade a good wiring diagram of the guages.