Hey buddy! Make sure you check the battery posts and lugs to make sure they are clean and then the lugs tight, If you don't do this once a year on an older vehicle, a small occlusion zone of galvanic do-do forms between the two pieces of metal from the exchange of electrons passing thru and other good stuff out of the atmosphere bonding in there with it and can actually cause a resistive barrier and not let the juice thru in the way you want, it also causes your battery to not fully charge. Clean your terminals and put the battery on the 8 hr 2amp trickle charge (solid link!) I think you will be pleased...the clicking is the solinoid not getting enough juice!
