Navistar Electrical Systems CV
Integration Guide
Page 51 of 84
Revision Date: 9/12/2019
5.2. Wiring Schematic
Figure 6.1.9:
Truck Equipment Manufacture (TEM)
Provisions at Junction Block - Instrument
Panel (8XJP)
6.
Auxiliary Battery Connections
Note: Frequent field issues have been encountered with systems that move the
OEM under-hood battery. Issues such as frequent Diagnostic trouble codes,
improper transmission controller operation [rough shifting and clutch slip problems]
as well as intermittent no crank issues have been reported. In many cases, the
issue is resolved by restoring the OEM battery and cables to factory arrangement.
6.1. Repair/Recommendation:
Relocation of the OEM under-hood battery should be avoided whenever possible.
The following guidelines are offered for issue resolution.
1. For 2016 and newer units, the Navistar recommended auxiliary battery
configuration is the factory option TP2 - Battery, 600 cold-cranking amps
primary, isolated 2nd heavy-duty 770 cold-cranking amps which allows 2
nd