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© 2000 Directed Electronics, Inc. Vista, CA
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 wire 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. 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
NOTE!
A 1-amp diode must be installed in line on the factory wire between the wait-to-start indi-
cator and the ECM. (See the following diagram for details.)
H2/3 GRAY/BLACK (-) diesel wait-to-start bulb input