Installation | Power Source Connection
IMPORTANT
When searching for the correct wires, DO NOT use a test light style circuit
tester. Damage to vehicle computers and vehicle air bag restraint systems may
result from the use of a test light causing a short circuit.
5
Locating Correct VehicleWires
1.
Use a multimeter.
2.
Set your multimeter to DCvoltage.
3.
Attach the negative (-) probe to the vehicle chassis ground.
4.
Probe the wires you suspect of being the constant and ignition power sources.
Note: The Nauto 3 Device can support vehicles with a 24-volt power source
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Co12V or 24V Power Connection (Nauto 3 Device Red Wire)
1. Find a source of co12V or 24V under the dashboard of the driver side of the car.
a. There are multiple places where this can be found, and locations vary between vehicles. Plan your installation according to your needs. You may find specific wiring
details by specific vehicle online, such as on The 12 Volt (www.the12volt.com).
b. Ensure that the wire you choose is a constant source of +12V or 24V. If you use a multimeter, it should show approximately 12V or better between your source and
chassis ground regardless of the ignition switch position, open or closed doors, on or off lights and other accessories, etc.
2. Using your preferred connection method (poke & wrap, solder, or posi-tap), using the provided inline fuse holder, connect the red wire from the power cable to one side of the
inline fuse holder, and the other to the source of +12V or 24V. Be sure NOT to permanently disconnect the 12V or 24V source from other circuits in the vehicle and take care to make
a strong connection to survive vibration and temperatures.
a.
Do not exceed the max amperage that the circuits fuse can handle, keeping in mind the cumulative amps of other after-market devices.
Ground Connection (Nauto 3 Device BlackWire)
1. Crimp or solder a ring terminal at the end of the black wire.
2. Connect it directly to a suitable metal spot on the vehicle’s chassis to create a solid ground. One method that may be appropriate is using a self-tapping screw. The driver’s
kick panel under the dashboard is a common grounding area, or any painted metal surface.
Ignition Source (Nauto 3 Device White Wire)
1. Locate the wire that you suspect will have ignition power.
2. If you use a multimeter, probe the suspected wire with the meter lead to check:
a. There should be zerovoltage. (key off)
b. With the key turned to the “ON” position in the ignition (do not start the vehicle), the wire should show 12 volts DC or more.
c.
With the meter lead still probing the wire, start the vehicle. While the starter is cranking, the wire’s voltage should not drop by more than 2 volts.
d. Turn the key to the “OFF” position. The voltage should return to 0.
3. Using your preferred connection method (poke & wrap, solder, or posi-tap), connect the white wire from the power cable to the source of Ignition. Be sure NOT to permanently
disconnect the ignition source from other circuits in the vehicle and take care to make a strong connection to survive vibration and temperatures.
a.
Do not exceed the max amperage that the circuits fuse can handle, keeping in mind the cumulative amps of other after-market devices.
WARNING
Do not plug harness into the Nauto 3 Device while making connections.
