Chapter 3 — Troubleshooting Information
Vehicle Power Supply Installation Guide 31
• Make sure cables are adequately dressed (protected) to go
around sharp edges, through holes without burrs, and do not
run unprotected around the lift.
• The sheath of the power cable adds protection from
accidental nicks and cuts. Additional sheathing may be
beneficial to protect the cables in highly vulnerable locations.
Inspecting the Fuse
Open the twist-lock fuse holder and remove the fuse for a
continuity test. If you substitute a new fuse and fails (blows),
check for the most likely causes:
• Shorted or mis-wired input cable.
• Faulty or (incorrect) power supply.
Using Electrical Measurements
Measuring for voltage
Connector pinout information is provided to aid measuring
voltage at the input power cable connector and at either end of
the power output cable.
Testing for continuity
Thorough continuity testing takes longer than either substitution
or voltage measurements. An ohmmeter is sufficient to diagnose
simple opens or shorts.
If fuses blow sporadically, or power supply shut down occurs at
random, you may want to use a megohmmeter to check cables
for high-resistance shorts between wires or between a wire and
the cable shield. See the “Troubleshooting Charts” on page 32 for
more information.
Caution: Cables must be disconnected at both ends
before you conduct any continuity tests.
Failure to disconnect cables completely may result
in damage or destruction of your test equipment,
or incorrect/misleading readings.
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