Owner's Manual

4
get a very low voltage (a few millivolts) reading on the wire that tests as the correct SWC wire.
In these cases (for example if it were to happen in a 2003 to 2007 GM Truck), it may be
necessary to isolate the wire from the steering wheel (cut the wire at the column) and tie the
green wire from the SWI interface directly to the side of the control wire coming from the
steering wheel. You will want to tape off the side (do not use) that leads away from the
steering wheel to prevent issues. Reattach the brown loop that the SWI vehicle specific
instructions indicated needed to be cut (purpose of the brown loop discussed later) and test for
a rest voltage of 0 volts on the control wire again. If you still have a slight voltage reading, you
can use the supplied capacitor (that came with the resistor kit) and put one lead to the SWI
green wire and the other lead to the SWI ground wire (black).
Locating 5 volt data control wire (Version 6 or 7) Orange Wire Applications
1) Using a multimeter set to test DC voltage, attach the black test lead to ground and the other to the
suspected control wire. Make sure that neither the SWI, nor the factory radio is connected to this wire
during testing. At rest with the ignition on, the meter should read approximately 5 volts. When any steering
wheel radio control button is pressed and held, the voltage should decrease slightly.
Locating 12 volt data control wire (Version 5) Yellow Wire Applications
1) Using a multimeter set to test DC voltage, attach the black test lead to ground and the other to the
suspected control wire. Make sure that neither the SWI, nor the factory radio is connected to this wire
during testing. At rest with the ignition on, the meter should read approximately 12 volts. When any
steering wheel radio control button is pressed and held, the voltage should decrease slightly.