6.
The electric lift truck has a two-wire system. The
frame must not be a common electrical path. Check for
50,000 ohms or more between each battery terminal
and a clean connection on the frame. Remove any cir-
cuit paths between the controller and the frame of the
lift truck, such as a dirty battery case. Carbon dust in a
motor or other parts can cause a circuit path. Check for
additional equipment that may cause a circuit path to
the frame.
7.
Check for voltage between each terminal of the con-
nector that fastens to the battery and a clean connection
on the frame. Normally, there is small voltage (less
than 30 percent of the battery voltage) between the bat-
tery and the frame, even though the resistance is very
high. A higher voltage can indicate a dirty battery or a
damaged battery. Clean the battery and battery com-
partment as necessary.
8.
Visually check for parts or wires that are loose or dam-
aged.
NOTE:
Make an identification of any wires before you
disconnect them. The wires must be reconnected correctly
after checks or repairs.
Figure 5. Putting the Lift Truck on Blocks
2200 SRM 1640
Electrical System Checks
5
