In Reply to: 12 volt conversion posted by Steve on September 21, 2018 at 07:40:21:
The solenoid is making a noise because of low voltage. That is likely caused
1. A weak battery (charge it & check it per tip # 49. Or get it load
2. Dirty grounds/connections (remove the cables & clean the connections)
3. Bad cables or incorrect sized cables (replace them - see tip # 41)**
4. Bad ground between the starter & the block. (pull the starter away from the block & clean the mating area - see tip # 36)
** You can't see corrosion under the insulation.