Buick is a division of General Motors that’s primarily concerned within the manufacturing of full-size sedans and crossovers. Due to the appreciable weight and footprint of those automobiles, they’re enough tow platforms for small- and medium-sized trailers. No Buick sedan was produced with a tow bundle, and on the crossovers it’s out there solely as an added-value possibility, so none are manufacturing unit-fitted with a wiring harness for trailer towing. Nonetheless, retrofitting a Buick with a flat 4-pin hitch, obtainable from most auto elements shops and the truck aisle of most house enchancment warehouses, is an easy venture.
Buick Trailer Wiring Installation Instructions
1. Discover the wiring harnesses serving the Buick’s rear light clusters. Relying on the mannequin and year of Buick being retrofitted, this will likely contain not more than lifting away panels of carpet from all sides of the cargo space. Alternatively, it might be essential to remove onerous plastic panels from the inside sidewalls of the cargo space; these are normally held in place by two screws every. Seek the advice of the proprietor’s handbook particular to the automobile for detailed instructions.
2. Find a rubber bung often inserted low within the cargo space that is meant to empty the spare wheel nicely, and change the bung with a rubber grommet. It could be essential to remove the spare wheel to find the bung. If there isn’t any bung within the mannequin Buick being retrofitted, use an electrical drill to make a gap near the middle of the rear quarter panel, at the same peak to the place the tow bundle is to be fitted. Match a rubber grommet within the gap.
3. Route the 4-conductor wire connected to the flat 4-pin hitch inward by means of the opening, and use cable ties to repair the plug to a sturdy exterior anchor equivalent to a bumper mount or chassis cross-member. Break up the inexperienced wire from the 4-conductor wire contained in the cargo space and route it to the again of the rear lamp cluster on the passenger aspect. Route the remaining three wires to the again of the rear lamp cluster on the motive force’s aspect.
4. Use a cable splice to affix the inexperienced wire to the Buick’s proper flip circuit behind the light cluster; confer with the schematics behind the proprietor’s guide to be taught the colour-coding of this and the suitable wires behind the driving force’s facet light cluster. Then use cable splices to affix the tow harness’s white wire to a floor wire, the harness’s brown wire to the taillights circuit and the harness’s yellow wire to the left flip circuit.
5. Use cable ties to safe the inside and exterior tow harness wires in order that they aren’t susceptible to unintentional injury. Reinstate the cargo spare wheel if needed, the cargo space aspect panels and carpeting.
Read more : How to Install Buick Trailer Wiring
