All the wires look to me. I double check the board with the thermister wires from the hot head. It read just fine. It must be the thermister on the hot bed its self.
Thank you
3D Printer:
Prusa i3 V2 DIY kit by RepRapGuru
Microcontroller: Arduino mega 2560 R3 clone
Print area: 8 x 8 borosilicate glass
Bearing: LM8UU linear bearings; 623ZZ bearings
Heated bed: Dual power 12V/24V (Pre setup for 12V)
Extruder: Mk8/9 Direct drive
Power supply: 360W 12V 30A
Stepper motor: 5 NEMA 17 4.8kg/cm
Belt: GT2
Board: RAMPS 1.4
Stepper driver: A4988
Endstop: Electronic end stop circuits w/ LED (3)
Upgrades:
Plywood mounted