Fuel Injector Polarity; Figure 4-5 Injector Connector Polarity - Delphi Multec 3.5 Applications Manual

System Interface
4.4.3

Fuel Injector Polarity

4-10
The Multec 3.5 Fuel Injector utilizes a 2 terminal electrical connector.
The terminals correspond to power and ground and are not polarity
dependent for injector performance, yet a polarity has been established to
reduce the severity of a coil short to the injector body from a full-on
condition to a blown fuse. See Figure 4-5.
Best practice is to maintain consistent polarity during all injector testing
and evaluation to minimize potential performance variation.
Positive Terminal

Figure 4-5 Injector Connector Polarity '+'

Multec 3.5 Fuel Injector Application Manual
Delphi Energy and Chassis Systems
Revision: 11/05-1