Troubleshooting TOUCHSET Depth Control System

NOTE: Machine MUST be properly connected to tractor and tractor key ON for troubleshooting.

1. Check machine wiring harness. Disconnect harness from potentiometer and measure voltage across connection points (C) and (A) (+5 volt and ground) using a volt/ohm meter.

If voltage measures +5 volts, TOUCHSET system is good from here forward. Go to step 2 and check potentiometer.

If voltage does not measure +5 volts, go to step 3.

2. Disconnect potentiometer linkage. Using a volt/ohm meter, measure potentiometer resistance between feedback (A) and ground (B) connections while rotating arm through full operating range. Resistance values should measure 500-1500 ohms with arm in full-up position and gradually increase to a maximum of up to 4500 ohms in full-down position.

A sudden change in resistance reading, a no-change reading, or a reading outside range indicates a bad potentiometer. If potentiometer is good, check tractor system.

3. Check tractor wiring harness. Measure voltage across (A) and (B) at 9-pin connector on tractor rear.

If voltage is +5 volts, machine wiring harness is bad.

If voltage is not +5 volts, go to step 4.

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4. Check voltage at tractor 3-pin connector. Trace wiring harness back to 3-pin connector on tractor and measure voltage.

If voltage is +5 volts, tractor wiring harness is bad.

If voltage is not +5 volts, go to step 5.

5. Check tractor fuse.

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