Bulletin HY25-1806-M1/US
Owner’s Manual
252 Series
Parker Hannifin Corporation
Chelsea Products Division
Olive Branch, MS 38654 USA
36
Installation Sketches
Wiring Chart MY2011 and Later Dodge and RAM Chassis Cab 6.7L Diesel
w/AISIN Transmission - 252 R Series (Continued)
(SK-495 & SK-567)
NOTE 1:
For MY2011 thru MY2018, the ground signal from the pressure switch must be connected to the
VSIM - Circuit W708. If there is no signal from the pressure switch within 30 seconds from when the
PTO solenoid is given power, the RAM system will turn the PTO off.
The VSIM is located near the parking brake and has four connections for four different wiring
harnesses to interface with. The W708 Circuit utilizes the Brown RAM upfitter harness supplied with
the truck. The W708 is cavity #8 and is an Orange/Brown wire. The order code for VSIM is XXS.
An upfitter supplied wire must be used to join the G425 (Violet/Yellow) Circuit to the W708
(Orange/Brown) Circuit in the Brown VSIM harness. Do not cut the G425 wires.
NOTE 2:
For MY2019+, the VSIM is located under the steering column and has four connections for four
different wiring harnesses to interface with. An upfitter supplied wire must be used to join the G425
(Violet/Yellow) Circuit to the W708 (Orange/Brown) Circuit in the Brown VSIM harness. Do not cut the
G425 wires.
NOTE 3:
When installing the PTO wiring using RAM’s remote mode, the default engine speed once the PTO is
engaged is 900 engine RPM. In order to operate the truck at higher speeds, the electronic vehicle
information center (EVIC) must be programmed for up to (3) additional speeds. See RAM’s body
builder guide for details related to the programming of the various speeds as well as what circuits
need to be grounded to actuate the multi speed function.
NOTE 4:
For MY2013, the RAM cab chassis is equipped with a OEM supplied PTO switch in the center
dash. This switch is not supplied with MY2019+. This OEM switch allows for the engine speed to
be adjusted using the cruise control buttons during PTO operation. Also, a single set speed can be
programmed to operate the PTO at a higher speed than the default of 900 engine RPM. This is the
only setup for adjusting the engine speed during PTO operation using the cruise controls. See the
RAM body builder guide for additional instructions and guidelines.
As with all PTO installations, a PTO engagement warning light must be utilized and be clearly
visible to the operator. When utilizing the RAM supplied switch the warning light is in the switch itself.
It will blink when activated and become solid once a signal is received from the PTO pressure switch.
The pressure indicator signal must be wired to RAM W708 Circuit in the truck’s VSIM for the system to
properly operate the PTO. For completion of the pressure indicator signal, a minimum of 14 wire is to
be used.
Per Chelsea’s Owners Manual, all PTO warning labels and safety devices must be utilized. Failure to
do so puts the operator at risk which would be the responsibility of the PTO installer.
NOTE 5:
Trucks coming from the factory are shipped in ship mode. In order to cancel ship mode, a RAM dealer
must flash the cancellation command.
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