Glow and Power Relays
The Groundsmaster
The glow relay supplies electrical power for the engine glow plugs when energized. The start relay is energized by the glow plug controller.
The power relay supplies electrical power for fuses F9
Testing
1.Park machine on a level surface, lower cutting deck, stop engine, apply parking brake and remove key from ignition switch.
2.Open hood to gain access to relay.
3.Locate relay and disconnect the machine wire har- ness connector from the relay. Remove relay from ma- chine for easier testing.
NOTE: Prior to taking small resistance readings with a digital multimeter, short the meter test leads together. The meter will display a small resistance value (usually
0.5ohms or less). This resistance is due to the internal resistance of the meter and test leads. Subtract this val- ue from from the measured value of the component you are testing.
4.Verify coil resistance between terminals 85 and 86 with a multimeter (ohms setting) (Fig. 29). Resistance should be approximately 72 ohms.
5.Connect multimeter (ohms setting) leads to relay ter- minals 30 and 87. Ground terminal 86 and apply +12 VDC to terminal 85. The relay should have continuity be- tween terminals 30 and 87 as +12 VDC is applied to ter- minal 85. The relay should not have continuity between terminals 30 and 87 as +12 VDC is removed from termi- nal 85.
6.After testing is complete, install relay to frame and connect wire harness to relay.
7.Close and secure hood.
| 30 | 86 | 87 |
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85 |
| 86 |
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| 87 | 85 | 30 |
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Figure 29
Electrical System | Page 5 | Groundsmaster |
