JACK DOWN DOES NOT TURN ON

  • Look at the Travel Mode light on touch panel.

 

Travel Mode light is on. Travel Model light is off.
Continue to test without JACK DOWN indicator light checks.
Disregard JACK DOWN indicator light checks in STEP 4 test procedures.

JACK DOWN LIGHT DOES NOT TURN ON

  • Unplug warning switch at jack that does not turn on.
  • Use a small jumper to short the two pins in the harness Packard connector together.

 

JACK DOWN light is now on. JACK DOWN light is still off.

JACK DOWN LIGHT DOES NOT TURN ON

VALVE CLOSED VALVE OPEN

Continue LR jack testing Continue LF jack testing Continue RF jack testing Continue RR jack testing

JACK DOWN LIGHT DOES NOT TURN ON

NOTE: ALL POWER SHOULD BE REMOVED FROM HWH LEVELING SYSTEM WHEN CHECKING RESISTANCE. When measuring hollow pin in harness connector do not insert probe into pin or damage could occur. Insert a wire of smaller diameter of pin (i.e. paper clip).

  • Use a jumper to apply a good ground to the warning switch signal wire. That will be the black wire going to the B pin in the Packard connector.
    • Left rear switch is pin 29 – wire #4000
    • Right front switch is pin 17 – wire #2000
    • Left front switch is pin 28- wire #1000
    • Right rear switch is pin 6 – wire #3000

 

Warning light now comes on:
There is a problem with the white ground wire in the harness.
Check terminal at Packard connector for good crimp/terminal.
If bad repair crimp/terminal and retest.
If light still comes on, repair/replace harness.		 Warning light still does not come on.

JACK DOWN LIGHT DOES NOT TURN ON

NOTE: ALL POWER SHOULD BE REMOVED FROM HWH LEVELING SYSTEM WHEN CHECKING RESISTANCE. When measuring hollow pin in harness connector do not insert probe into pin or damage could occur. Insert a wire of smaller diameter of pin (i.e. paper clip).

  • Unplug the 35 pin connector from the I/O module. Check for continuity between pin 11 and the correct pin for the warning switch that is not coming on. Make sure the two pins in the warning switch harness plug are shorted together.
    • Left rear switch is pin 29 – wire #4000
    • Right front switch is pin 17 – wire #2000
    • Left front switch is pin 28- wire #1000
    • Right rear switch is pin 6 – wire #3000

 

If there is no continuity, there is a problem with the warning switch wire or ground wire from the 11 pin. There is good continuity between the two pins.

JACK DOWN LIGHT DOES NOT TURN ON

NOTE: ALL POWER SHOULD BE REMOVED FROM HWH LEVELING SYSTEM WHEN CHECKING RESISTANCE. When measuring hollow pin in harness connector do not insert probe into pin or damage could occur. Insert a wire of smaller diameter of pin (i.e. paper clip).

  • Check and record the voltage between pin 35 of the 35 pin harness connector and the brass ground stud on the top of the I/O module.
  • Plug the 35 pin connector back in.
  • Remove the jumper from the two pins in the warning switch harness connector.
  • Check the voltage between the black warning switch wire (close to the I/O module) and the brass ground stud on the top of the I/O module.
  • Strip some insulation from the wire close to the connector. Make sure to repair the wire with some type of sealant when the test is finished. The voltage should be within less than 1 volt of the voltage you recorded on pin 35 of the harness connector.

 

If there is a difference in the voltage greater than 1 volt, the I/O module needs to be replaced. If the voltage is good, the problem is the I/O module or touch panel. Replace the touch panel first. If the problem remains, reinstall the original touch panel and replace the I/O module.
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