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| Illustration 1 | g00531356 |
System Schematic For Starting Motor Relay (SMR) | |
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| Illustration 2 | g00583676 |
Junction Box Without The Cover (The junction box is located on the side of the generator terminal box.) (1) Starting Motor Magnetic Switch (SMMS). | |
Two starting motor magnetic switches (SMMS) are used in a system with two starting motors. One switch is used for each starting motor.
Test Procedure
- From beneath the control panel, disconnect DC connector 2 from the control panel. DC connector 2 is the left most connector when viewed from the front panel. From beneath the control panel use the 7X-1710 Multimeter Probes in order to measure the resistance between connector contact 6 (SMMS) and connector contact 11 ("B-"). The resistance should measure the following value.
- 26 to 33 ohms for single starting motor systems
- 13 to 17 ohms for dual starting motor systems
If the resistance is NOT correct, replace the defective magnetic switch. If the resistance is correct, proceed to Step 2.
- 26 to 33 ohms for single starting motor systems
- Disconnect the cable that is going from the pinion solenoid to the starting motor. Do this procedure on both starting motors of a dual starting system.
- Connect a DC voltmeter. At the SMMS, connect the positive cable to wire 24 and the negative cable to wire 25. IIf the second magnetic switch is tested in a dual starting motor system, then connect the negative cable to wire 26.)
Note: The jumper wire of Step 4 can remain connected for only ten seconds.
- Temporarily connect wire 4 to the battery positive terminal ("B+"). Disconnect this wire immediately after the voltage is measured. Do NOT leave the wire connected more than ten seconds. The correct measurement changes from approximately 24 DCV to approximately 2 DCV.
If the voltage is greater than 2.0 DCV, then replace the magnetic switch. If the switch passes the requirements of Step 1 and Step 4, the switch is functioning correctly. Reconnect the wires and cables that were removed in this procedure.