TK 55676-19-IM-EN
55
D2/D4 Heater Wiring Installation
Special Tools Required
Wire Cutters
Terminal Crimping Tool
Locate the heater harness supplied in the kit. Remove the two small plastic bags attached to the harness containing the
fuel pump electrical connector components and the in-line fuse assembly. Retain these for installation later.
1. Connect the 16-pin connector to the heater:
a. use a large bladed screwdriver to pull the locking tab out ((tto
o u
un
nllo
occkk)) from the connector body.
b. connect the two 16-pin connectors together.
c. push locking tab back in ((tto
o llo
occkk)) the connector body.
2. Route the heater control harness connectors into the control box, but D
DO
O N
NO
OT
T make any connections to the
interface board at this time. They will be connected later after the Heater Start-Up Procedures are completed.
3. The 8-pin connector (with 4 wires) is used for diagnostic purposes only.
4. Route the fuel pump harness out of the sleeper through the 3” access hole. It will be assembled and connected to
the fuel pump in a later step
Figure 31. Heater Harness Connections Shown
