C.E. Niehoff & Co. A9-4056 User Manual

NOTICE

This sensor/wire assembly is used to
replace the temperature sensor black
wire (B− terminal) when necessary on
various CEN temperature-voltage sense
wiring harnesses (with or without other
external connections such as J1939
connections). For more information,
see CEN Service Bulletin SB27.

A9-4056

Temperature Sensor

Replacement Instructions

1. Make sure master battery switch has been
turned off on vehicle.

2. Disconnect temperature-voltage sense harness
at both B+ and B− terminals at battery.

3. From black wire on existing harness, cut off
first six inches on B− terminal end, which
includes the sensor.

4. Strip 1/4” from the shortened black wire on the
harness. Crimp one end of insulated butt
splice on shortened wire.

5. Crimp end of new sensor/wire assembly on
other end of butt splice.

6. Use heat gun to seal spliced ends.

7. Re-attach new black wire in harness to battery
negative post and existing red wire to 14V
battery positive post for 14 V systems or 28 V
battery positive post for 28 V systems.

2. Reconnect master battery switch and test
charging system for proper function.

Butt splice

A9-4056 Temperature sensor
replacement assembly (black wire)

Figure 1 - Temperature Sensor Replacement Details

If you have questions about your a lternator or a ny of these instructions, or i f you need to locate a Factory Authorized Service Dealer, please contact us at:

TEL: [phone] USA and Canada • TEL: [phone] outside USA and Canada • FAX: [phone]

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C. E. Niehoff & Co.• 2021 Lee Street • Evanston, IL 60202 USA

E-mail us at [e-mail]

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