2. C.E. Niehoff & Co
  3. A9-4082 Temp/Voltage Sense J1938 Adapter harnsess

C.E. Niehoff & Co A9-4082 Temp/Voltage Sense J1938 Adapter harnsess Installation guide

  • I've reviewed the installation instructions for the C.E. Niehoff & Co. Adapter Sense/1939 A9-4082. This document provides guidance on installing the temperature-voltage sense harness in dual alternator systems. It covers topics such as connecting the harness to the vehicle's J1939 system, the regulator and battery terminals. I understand the key features, such as temperature based charge compensation, and I’m ready to help answer your questions.
  • Where can this adapter harness be installed?
    What does the regulator do when the harness is installed?
    What is the limit of line loss voltage compensation?
    Where is the vehicle's J1939 harness connected on the Adapter harness?
    Where does the black wire with sensor connect to?
II265
Installation Instructions (for U.K. only)
A9-4082 Adapter Temperature-Voltage
Sense/1939 Harness
Installation Instructions
Page 1 of 1
The adapter temp/voltage sense harness may be installed in-line on dual alternator applications equipped with
“smart” regulators, where temp/voltage compensation was not previously implemented. When installed, the
regulator compensates charge voltage based on battery temperature. Line loss voltage compensation is limited
to 1V above nominal set point.
1. Disconnect vehicle J1939 harness from regulator.
2. Attach vehicle J1939 harness to J1 connector on
Adapter harness.
3. Attach other end of Adapter harness into J1939
connector of regulator as shown in Figure 1.
4. Connect black wire with sensor from Adapter harness
to the B- terminal on battery.
5. Connect red wire from Adapter harness to B+
terminal on battery.
Note - If wires are not of sufcient length, follow
steps below.
Black:
1. Cut wire six inches from B- ring terminal, which
includes the Temperature-Voltage sensor.
2. Strip 1/4” from the adapter wire on the harness.
Crimp and splice ends with heat shrinkable bu
splice.
3. Re-connect sensor terminal wire to harness, with
heat shrinkable bu splice.
4. Use heat gun to seal wire with splice.
Red:
1. Cut o ring terminal.
2. Strip 1/4” from the harness and new wire leads.
Use bu splice to connect two leads.
3. Choose proper size ring terminal and splice at
end of wire.
4. Use heat gun to seal bu splice.
Butt splice
(If Necessary)
Temperature
sensor (Do
not Discard)
Vehicle J1939
harness
Regulator
connector
B+(Red)
wire
Ground(Black)
wire
Figure 1: Adapter Harness
Ring
terminal
Follow these instructions to properly install Adapter
Harness
Illustration is used for reference
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