on the starter itself with a screwdriver jump from the large(batt) terminal to the small (solenoid) terminal. Be careful not to touch the screwdriver to the starter body. If it cranks the starter is obviously good so go up to the relay & with the screwdriver jump from the large (batt) terminal to the fairly large brown WIRE that goes down to the starter. If it cranks plug the brown wire back onto its terminal & take off the neutral safety switch WIRE on the starter relay & ID it as it is plugged on a male terminal that says "grn" on the brown face of the neutral safety switch & ground the male TERMINAL on the relay with a jumper wire to GROUND & see if it cranks with the ign key.