Hi

This is really a BT Reflex with Toyota stickers

Is the machine totally dead until you pull the K10 contactor in?

Check the F60 - 10 amp fuse inside the motor compartment, this is the main system fuse that controls the ignition circuit.

C25 = General CAN BUS fault - look in the error log for the code thats flagged this.

E104 = Parking brake fault - Check the service switch under the dash panel, you have to remove the arm rest panel ( lift the cushion & remove the wing nut ) its the switch on the left as your sitting on the truck, it can get knocked if the arm rest panel is refitted incorectly.

Check the brake coil is connected, measure the resistance over the coil.

Cable number 40 is the battery minus & cable 64 is the brake output from pin 802 on the A5 card under the armrest ( the big silver card )

Need the serial number to get the exact manual as there are several ( electrics & hydraulics are different )