Making Your Wiring Connections - Viper 500 ESP Installation Manual

Once you have determined the wire color, the easiest place to connect to the wire is often at the kick panel, at
the windshield pillar, or in the running board. When an easy location is not available, running a wire to the dome-
light itself is often the best solution.
How to find a door pin switch trigger wire with your multimeter:
1. Set to DCV or DC voltage (12V or 20V is fine).
2. In most Fords, fasten the (-) probe of the meter to chassis ground. In most other cars, fasten the (+) probe
of your meter to (+)12V constant.
3. Probe the wire you suspect of being the door trigger wire. If the meter reads (+)12V when any door
is opened, you have found a trigger wire.

making your wiring connections

Before making your connections, plan how your wires will be routed through the vehicle. For instance, the yellow
ignition input, the red 12V constant input, and the orange ground-when-armed output (for the starter kill relay)
will often be routed together to the ignition switch harness. In order to keep the wiring neat and make it harder
to find, you may wish to wrap these wires together in electrical tape or conceal them in tubing similar to what
the manufacturer used.
There are two acceptable ways of making a wire connection - solder connections and crimp connectors. When
properly performed, either type of connection is reliable and trouble-free. Regardless of whether you solder your
connections or you use mechanical-type crimp-on connections, ensure that all connections are mechanically
sound and that they are insulated.
Cheap electrical tape, especially when poorly applied, is not a reliable insulator. It often falls off in hot weather.
Use good-quality electrical tape or heat shrink.
Never twist-and-tape the wires together without soldering.
Never use "fuse taps", as they can damage fuse box terminals.
If you use tapping connectors such as 3M T-Taps (not to be confused with Scotch-Locks), avoid using them in
higher-current applications (constant 12V, ground, etc.). Some tapping connectors are inferior in quality and
should be avoided.
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© 1999 Directed Electronics, Inc. Vista, CA