Service Manual

Multi Pro 5800 Page 6 − 65 Electrical System
Speed Lock Coil
The speed lock coil is energized by the speed lock
switch on the console. The energized coil becomes an
electromagnet and holds the traction pedal in position to
maintain ground speed for accurate sprayer operation.
The speed lock coil is located below the floorboard to the
right of the traction pedal (Fig. 91).
Testing
1. Park machine on a level surface, stop engine and en-
gage parking brake. Remove key from ignition switch.
2. Locate the speed lock coil and disconnect the wire
harness electrical connector from the coil.
NOTE: Prior to taking small resistance readings with a
digital multi meter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms 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 coil you are test-
ing.
3. Using a multimeter (ohms setting), verify control coil
resistance between the coil terminal and the frame of
the coil. Resistance should be from 3.6 to 4.0 ohms.
4. If coil resistance is incorrect, replace speed lock coil.
5. If the speed lock coil tests correctly and a circuit prob-
lem still exists, check wire harness (see Electrical Sche-
matic and Wire Harness Drawings in Appendix A in this
manual).
6. After coil testing is complete, connect the coil con-
nector to the machine harness.
1. Traction pedal 2. Speed lock coil
Figure 91
1
2