How to Add a 7-Way Trailer Connector to a 2005 Toyota Highlander with Tow Package

Updated 08/27/2014 | Published 08/26/2014

Question:

I have a small trailer with just brake lights and a 7 prong plug. Do I need the 118248 harness plus the 30717 adapter? signed, totally confused.

asked by: George

Expert Reply:

If your 2005 Toyota Highlander does not currently have any trailer connector but does have the tow package then you will first need to install a 4-Way such as # 118248. If it did not have the tow package you would use # 118413.

Then you would need a 4 to 7-Way adapter. You can use # 30717 but I recommend # 37185 since it comes with a mounting bracket. For either you will need to make sure the white wire is grounded to a clean bare metal surface.

Since you only need the light functions the remaining wires can be taped up and stowed out of the way.

expert reply by: Michael H