Ok, here with the good news. I identified the issue. One of the leads contained in the main cable wasnt fully seated/connected in the plug, that then goes into the connector, to wich the grip is connected. I suspect it was either creating a short, OR, missing one contact from the 5-6 leads( i didnt count how many they are and I dont know how they work, but of coruse you need all of them for the whole sytsem to work)