Connecting Your Wires; Obtaining Constant 12V - Directed Electronics 3901V Installation Manual

Connecting your wires

Now that you have decided where each component will be located, you're going to find the wires in the
car that the security system connects to.
IMPORTANT! Do not use a 12V test light to find these wires! Use a digital multimeter for all testing
described in this manual.

Obtaining constant 12V

We recommend two possible sources for 12V constant: the (+) 12v terminal of the battery, or the constant
supply to the ignition switch. If you connect the module to the CAN bus wire at the OBD II plug, you can
use the +12 v wire existent in the plug. Always install a fuse within 12 inches of this connection.
IMPORTANT! Do not remove the fuse holder on the red (N1/3)wire. It ensures that the control module
has its own fuse, of the proper value, regardless of how many accessories are added to the main power feed.
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