Injection Advance Solenoid (GM 3000–D)

The injection advance solenoid is located on top of the injector pump, which is on the right side of the engine. Its has two black wires connected to it. One wire leads to a connector with orange and white wires. The other wire is grounded to the injector pump. The solenoid is powered from the orange (top) wire (Fig. 52).

In Place Testing

Note: Prior to taking small resistance readings with a digital multimeter, short the test leads together. The me­ ter will display a small resistance value (usually 0.5 ohms or less). This resistance is due to the internal re­ sistance of the meter and test leads. Subtract this value from from the measured value of the component you are testing.

1.Remove wire clip from the connector and discon­ nect connector.

2.Using a digital multimeter, attach one lead to the lug of the ground wire. Connect other lead to the pin in the connector that is attached to the injector pump. The orange wire on the harness connector powers the sole­ noid.

3.The resistance should be about 14.6 ohms.

Live testing

1.Remove wire clip from the connector and discon­ nect connector.

2.Connect a positive (+) test lead from a 12 VDC source to the pin in the connector that is attached to the injector pump. The orange wire on the harness connec­ tor powers the solenoid.

3.Touch a negative (–) test lead from the 12 VDC source to the solenoid body. The plunger should retract making an audible ”click”.

4.Disconnect the test leads from the solenoid and connector. Reconnect connector and wire clip.

CONNECTOR

SOLENOID

GROUND WIRE

Figure 27

Electrical System

Page 6 – 18 Rev. A

Groundsmaster 3000/3000–D

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Image 124
Toro 3000D manual Injection Advance Solenoid GM 3000-D, Electrical System 6 18 Rev. a