Many liftgates still use single pole systems and are grounded through the fifth wheel and kingpin. According to Phillips, when the kingpin ground is interrupted, the 8-gauge wire at the J560 connector can become overloaded.

Phillips says the solution is a dual-pole cable. The dual-pole cable has a dedicated positive and ground line directly from the tractor batteries.

The extra reliability in the connection ensures that there is a continuous charge to the liftgate batteries.

When using the dual-pole cable, Phillips says you are providing a cleaner signal to the liftgate batteries and other auxiliary components.

Learn how to move your used trucks faster
With unsold used inventory depreciating at a rate of more than 2% monthly, efficient inventory turnover is a must for dealers. Download this eBook to access proven strategies for selling used trucks faster.
Download
Used Truck Guide Cover