NORAC UC4.5-BC-HD1 - Manual (Page 21)

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IMPORTANT:
Provide enough slack in all cables to account for the movement of the main
section, parallel lift, and FOLDING boom movement.
13. The Hardi control box does not require the polarity of the power source to be Negative
Ground. However, before connecting C10, ensure the Hardi system is wired as Negative
Ground. Follow the procedure below to check the polarity.
a) Locate the Yellow (left boom) and White (right boom) wires in either the hitch
connection or the Hardi control box.
b) Using a meter or test light and connect one probe to ground and the other probe to
the Yellow or White wire. If the wire has voltage without the switch being activated,
the polarity is reversed. Repeat the test for the other wire.
c) Change the polarity of the Hardi Control box. (Switch the Power and Ground
connections.)
d) With the meter connected as in step b) check if either the Yellow or White wire has
voltage. Neither wire should have any voltage. Flip the switch to raise the booms. The
meter should now show voltage on the Yellow or White wires and the Hardi control
box is wire correctly with negative ground.
14. Connect the free hanging wire of C10 (Sense lines) to Hardi wiring. The wiring can be
connected to the Hardi wiring inside the hitch connection or a 3/4" hole drilled in the
bottom of the Hardi control box using the supplied compression fitting. With either
installation the wiring will be the same.
15. Strip off a few inches of shielding from the free hanging wire on C10. Strip the ends of the
Black and Black/White wires.
16. Connect the Black wire to the Hardi Yellow wire and the Black/White wire to the Hardi
White wire.