Actually at the starter have a magnetic relay,the one that sound ketak,ketak.normally adding extra relay is to give more power to the magnetic relay.since you already change to new starter,why don't you try to test both your magnetic relay and starter by giving them direct voltage from battery.dismantle the starter from the gearbox first.if even with direct voltage sounds weak,maybe you get a recond starter or problematic new starter.
so means the cable to give direct current to the starter actually needs a relay and a fuse, i guess is something like battery --> fuse --> relay --> starter then use the existing power from the starter cable to trigger the relay?
