Trailer wiring from draw tite curt pollak tow ready bosal and. Volvo xc90 trailer wiring. 2001 2007 xc90. 2004 volvo xc90 trailer wiring harness. Select vehicle year go. How to install a wiring harness for a trailer on a 2004 volvo xc90 what we are going to is a module light install on a volvoRead More