Edelbrock 3670 User Manual - page 51
Installation and Setup
51
3.2.3.10 Main Wiring Harness and Engine Wiring
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Main Wiring Harness and Engine
Wiring
Figure 19
Once all sensors have been placed, the harness can be routed and connected to each.
Lay the harness out and become familiar with each connection. Do not rush the harness
installation. Take some time to plan the routing of each branch. This will improve both
the look and reliability of the installation. See Figure 19. Before installing the harness,
be sure vehicle battery is disconnected. For all GM applications, odd numbered injectors
go along the driver side fuel rail and should be retained by the clips at each rail mount
screw. Bend the clamp as required to hold the conduit. Even numbered injectors, along
with the TPS, ECT, and MAF sensor connector branch go along the passenger side rail
and should be retained the same way. Route & retain wiring to protect it from heat and
vibration and for a clean, professional looking installation. A little extra time spent
routing the harnessing can make a big difference. This includes spark plug wire routing
as well. Plug in injectors and sensors into the connectors labeled for each. On a GM
engine model, the 1,3,5,7 cylinders are front-to-back on the driver side; while the
2,4,6,8 cylinders are on the passenger side.
It is important that the system has reliable power and ground connections. Attach the