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- 1). Find an appropriate location for placing the converter in the trunk close to the left taillight.
- 2). Drill a hole in the trunk body as a ground point. Scrape or sand away any rustproofing around the hole to ensure a good ground connection.
- 3). Attach the white wire from the converter to the ground point using the eyelet at the end of the wire and the supplied screw.
- 4). Disconnect the vehicle's battery cable from the negative battery terminal.
- 5). Crimp a ring terminal to one end of the inline fuse holder. Remove the fuse from the fuse holder, and attach the fuse holder to the positive battery terminal.
- 6). Feed a 12-gauge wire from the fuse holder through the interior or underneath the vehicle to the converter box in the trunk. Crimp the 12-gauge wire to the fuse-holder wire using the supplied butt connectors.
- 7). Reconnect the vehicle's battery cable to the negative battery terminal.
- 8). Determine if the vehicle has a two-wire or three-wire taillight system. A two-wire system uses the same bulb for the brake light and the turn signal. Vehicles with a separate stop light bulb and a combination bulb for turn signals and stoplights should be wired as two-wire systems. Three-wire systems have amber turn signals and separate bulbs for red stoplights and turn signals.
- 9). Crimp the supplied spade terminal on to the end of the Modulite controller's red wire in a two-wire system. Attach the red wire to the same ground point wire used by the white wire.
- 10
Determine which wire in the left taillight assembly is the wire for the taillight by using a voltage meter or circuit tester. Tap the brown wire from the Modulite unit into the taillight wire using one of the supplied wire taps. - 11
Determine which wire in the left taillight assembly is the wire for the stoplight by using a voltage meter or circuit tester. In a three-wire system only, tap the red wire from the Modulite unit into the stoplight wire using one of the supplied wire taps. - 12
Feed the Modulite unit's green wire to the right-side taillight assembly. Determine which wire in the right taillight assembly is the wire for the right turn signal by using a voltage meter or circuit tester. Tap the green wire from the Modulite unit into the taillight wire using one of the supplied wire taps. - 13
Insert the supplied 15-amp fuse into the fuse holder. Secure all excess or slack wiring with cable ties. - 14
Plug the Modulite trailer connector into the trailer's wiring harness plug and test the lights.
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