Willie B
Senior Member
You can stab at it willy nilly, but a good mechanic is a real time saver.
Another time saver is a schematic diagram.
Use the diagram to follow the electrons. Your starter has a high current circuit. Probably electrons go to the frame from the battery, pass through every bolted section between the battery & the starter frame. From the starter, current likely flows back to the battery along a heavy cable. Might be a switch or two. Solenoid might be a part of the starter, or a separate relay. Solenoid is a switch controlled by an electromagnet. Your problem might be in this high current circuit. It needs very low resistance connections ALL the way round trip. 12 volts is not enough electrical pressure to push past any high resistance connections. Current might reach 400 amps in this circuit.
Other fail is low current. To start, you need 12 volts passing through the magnetic coil in the solenoid relay. You need a helper & a lot of caution to be sure nothing rips your hands off. Follow with a bright incandescent test light first at the solenoid. If no power there, work your way back to where you do have voltage. Could be a bad connection in wiring, or inside any of the switches. Might be a fail inside solenoid, ignition switch, or the starter itself.
Another time saver is a schematic diagram.
Use the diagram to follow the electrons. Your starter has a high current circuit. Probably electrons go to the frame from the battery, pass through every bolted section between the battery & the starter frame. From the starter, current likely flows back to the battery along a heavy cable. Might be a switch or two. Solenoid might be a part of the starter, or a separate relay. Solenoid is a switch controlled by an electromagnet. Your problem might be in this high current circuit. It needs very low resistance connections ALL the way round trip. 12 volts is not enough electrical pressure to push past any high resistance connections. Current might reach 400 amps in this circuit.
Other fail is low current. To start, you need 12 volts passing through the magnetic coil in the solenoid relay. You need a helper & a lot of caution to be sure nothing rips your hands off. Follow with a bright incandescent test light first at the solenoid. If no power there, work your way back to where you do have voltage. Could be a bad connection in wiring, or inside any of the switches. Might be a fail inside solenoid, ignition switch, or the starter itself.