JLG E450A, Service And Maintenance Manual, Page: 409 / 480

SECTION 7 - BASIC ELECTRICAL INFORMATION & ELECTRICAL SCHEMATICS
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BRAD HARRISON / PHOENIX CONTACT M12
The connector uses gold contact material to resist corrosion
and an o-ring seal for moisture integrity. If dielectric grease is
mistakenly applied to this connector system, the low-force
contacts cannot displace the grease to achieve electrical con-
tact. Once contaminated, there is no practical way to remove
the dielectric grease (replacement of female contacts
required). The JLG Load Sensing System and 1250AJP Rotary
Angle Sensors are examples of components with the M12 con-
nector system.
AMP JUNIOR TIMER
This type of connector uses back-seals for moisture integrity.
However, the low-force contacts cannot displace dielectric
grease and create electrical contact. It is possible to use sol-
vents (i.e. contact cleaner or mineral spirits) for the removal of
improperly applied dielectric grease. The EMR2 engine control
module from Deutz employs this connector system (for exam-
ple).