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© 1999 Directed Electronics, Inc. Vista, CA 17
harness 2 (H2), 2-pin auxiliary plug
Connect this wire to the wire in the vehicle that sends the signal to turn on the WAIT-TO-START bulb in the dash-
board. In most diesels the wire is negative (ground turns on the bulb) and the GRAY/BLACK can be directly
connected to the wire in the vehicle. If the vehicle uses a positive wire (12V to turn on the bulb) a relay must
be used to change the polarity. (See Finding the Wires You Need section of this guide.) Here are some common
colors of this wire:
■ Chevrolet and GMC trucks: Light Blue or Dark Blue
■ Ford Trucks: Black/Pink
■ Dodge Ram Trucks: Orange/Black or Black/Orange
H2/1 GRAY/BLACK (-) diesel wait-to-start bulb input