Try charging your battery before. you start taking things apart . If battery full charge & problem persist check and clean all contacts from battery to starter & ground . ( Remove & make sure there is metal to metal contact on all connections ) Also make sure all connectors on relays are good and solid . ( I've had some move down because of gravity and vibration , I just pushed them back in their proper place & this worked for me once ) I've not had a problem since . I do know that I'm installing a new battery for the coming season .. This should keep you busy for an hr or so .