MSD digital 6 plus problem
 

hoping somone here can help before i call the company. double and tripple checked the wiring and all is perfect. this is what i got the led light in the unit flashes once per second indicating a charging problem right?? well at least thats what it says in the manual. with the car running i have 13.7 volts going into the battery and the msd box. i cant figure this out. has somone had this problem and what was it??

I think the flashing on the unit means the trigger is firing.
check that.
On the new ones it means it's on
Al