Carrier X4 Trailer Refrigeration Unit Instructions

Carrier Corporation (“Carrier”) shall have no obligation or responsibility (including product warranty obligations)
with respect to (a) any third-party components not supplied by Carrier, (b) non-compliant installations of Carrier
components or (c) configurations of Carrier components that differ from Carrier’s recommended configurations.
Further, Carrier provides these instructions as a courtesy only, and on an as-is basis. By using these
instructions, you acknowledge and agree that use of these instructions is at your own risk.
Prime Option Connections
Models: X4
Purpose: The intent of this technical instruction is to provide visual reference for the electrical
connections for the Door Switch (DS), Fuel Level Sensor (FLS),Light Bar (LB), Power Control Switch
(PCS), and Tire Pressure Inflation System (TPIS) options installed on Prime applications. Refer to the
individual installation documents for installation procedures.
1RPC
Connect J1 to J1 engine harness.
Remove cap and fuse from J1.
Figure 1. Lynx Fleet/PCS/Unit Harness Connections
98-50482-00 REV B
7/16/2024
Page 1 of 2
Figure 2. Door Switch/Fuel Level Sensor/TPIS Connections
Figure 3. Light Bar Connection
98-50482-00 REV B
7/16/2024
Page 2 of 2
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