From the battery, a heavy gauge red cable is attached straight to the starter motor. Because no current flows through the sucking coil, so the moving iron core can only hold the coil in a fixed position by the magnetic force. (The heights of the two contacts in the switch cap should be consistent). The two retaining bolts in the solenoid cover contacts are quite easy to loose due to the starter vibrating, so they should be tightened whenever maintaining the starter. (The working process has been introduced before in Starting System Wiring Diagram), Starting control circuit with starter relay&safety switch. Explanation of the boat and marine wire and cable color codes with applications. 2. Therefore, the thick terminal with one thread end should be connected to the field winding, while thick terminal without thread end should be connected to the car battery. Page 33 Note: Generator sets built after serial number 2175814 have a different engine harness design. Simply connect the battery terminal anode and terminal B of the starter by a lead wire. From what is it, to how to wire it, from how to replace it to how to repair it by yourself. At this point, the drive gear should move forward. To protect the ignition switch, lots of modern cars apply the starter relay to control the starter solenoid. Starter Solenoid Holding Coil Test Instruction. (The working process has been introduced before in Starting System Wiring Diagram). While the ignition switch is not turned to the start position, the starter solenoid will not connect to the start circuit, and the starting gear is separated from the flywheel. Remove the nut in the starter solenoid terminal S. Step 6. If the drive gear reverses, it indicates that the solenoid holding coil is damaged. 1. Car battery anode(+), ignition switch start gear, terminal 50, sucking coil, terminal C, field winding, armature winding, ground wire, car battery cathode(-), Meanwhile, the current direction that passes through the holding coil is as below: Auxiliary Battery Solenoid. Car battery anode (+) > fuse > ignition switch (start position) > solenoid terminal 50 > sucking coil > terminal c of the solenoid switch > field coil > positive brush > armature coil > negative brush > ground wire > storage battery cathode(-), Storage battery anode > fuse > ignition switch (start position) > solenoid terminal 50 > holding coil >ground wire > car battery cathode (-). When turning on the switch, the indicator light in the circuit should be brightened up. If not, you should find the problem(s) that cause the stuck and fix it. If your multimeter has the continuity mode, it will be even easier to figure out your starter solenoid condition by testing the continuity of each connection. If the starter functions well, the malfunction lies in the solenoid switch and is often caused by the ablation of the starter solenoid contacts. In the diagram the thick red line connects to the solenoid, and then to the starter. Terminal B and Terminal M are usually copper bolts with a thickness of 8mm or 10mm, the one with lug plate is terminal M, which is the power supply terminal of the motor field winding; the other one is terminal 8, which is the power line terminal of the car battery. After turning the ignition switch to the start position, the circuit of the starter relay coil will be conductive, and the electric current direction is as below: After turning the ignition switch to the start position, the circuit of the starter relay coil will be conductive, and the electric current direction is as below: car battery anode >  ignition switch terminal 1 >  ignition switch terminal 3 >  starter relay terminal (The one use to connect to ignition switch) >  coil ground wire >  car battery cathode. Note: For complete wiring diagram details, see Section 7. This is the relay that controls the starter motor. Austin B. Step 9. Newsletter sign up. Tel# 877 668 7278 Sometimes, there are 4 terminals on the solenoid cap, and those are: terminal B (or 30), terminal M (or C), start terminal S (or 50) and ignition terminal R (or 15a), as shown in Fig below. The working circuit of the starter can be activated after the ignition switch is on. when testing, I had difficulty finding a dual signal purpose lock unlock wire thus could not use "F" diagram thus begun experimenting with the other diagrams. When I was writing this guide, I found a quite interesting book, and there are many electrical accessories’ prices recorded in the book. The electromagnetic force of the solenoid switch sucks the movable iron core in the Starter Solenoid to contact the two terminals, one of which connect to the positive pole of the battery and the other terminal to the starter. The solenoid isolator uses a continuous duty solenoid to connect the auxiliary battery during certain times (like starting and charging) then disconnects when not in use. If not, the solenoid sucking coil is very likely damaged. The movable iron core should be able to move smoothly. Or M10 copper bolts hold coil a spring washer when installing the bolt DC supply L+! 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