JLG M4069 Service Manual - Manual (Page 121)

SECTION 6 - GENERAL ELECTRICAL INFORMATION & SCHEMATICS
3121639 – JLG Lift – 6-9
Service - Voltage Reading
DO NOT PIERCE WIRE INSULATION TO TAKE VOLTAGE READ-
INGS.
It has been common practice in electrical troubleshooting
to probe wires by piercing the insulation with a sharp
point. This practice should be discouraged when dealing
with the AMPSEAL plug assembly, or any other sealed
connector system. The resulting pinholes in the insulation
will allow moisture to invade the system by traveling along
the wire strands. This nullifies the effectiveness of the con-
nector seals and could result in system failure.
Figure 6-11. Connector Installation