My dual xdm6820 doesnt turn on and theres a red binking light

Probably you are mising 1 voltage,check this you need to have 2 voltages ok,1 voltage has to be present on the yellow wire(constant voltage,means all the time,ok) and the second voltage on the red wire (this voltage has to be switched wiht the ignition key)check this and try to fix the problem,probably there is a fuse blown,you can use a tester light to check the 2 voltages.or if you dont want to do this just conect the yellow and red wires together and the unit has to turn on.