FMCA is for motorhome owners. Motorcoach articles, motor home blogs, motor coach advice and motorhome videos.

  • Advantage, FMCA Members
  • More RV Lessons from the Road

    Since Mike Wendland posted his "Top 10 RV Lessons Learned After 75,000 Miles," several readers have asked for another installment.

  • Area Rallies

    FMCA members have been enjoying rollicking good times at area rallies for many years. See what rallies are coming up next ...

  • Join FMCA

    Become a member of the world's largest and best organization for motorhome owners.

  • Especially for You

    FMCA members have priority access to the nation's leading specialty RV insurance experts.

  • Towing

    FMCA's towing guides and related information can shed light on towing a vehicle behind a motorhome.

Towed vehicle lighting and wiring

Options to achieve this include using a light bar or wiring into the towed vehicle's wiring system.

Light bar
The easiest, though not the most visually appealing, option is to attach a magnetic or strap-on light bar to the rear of the towed vehicle. The wiring routes forward to a plug and taps into the motorhome's wiring system near the hitch.

Light bar kits do not require the owner to tap into the towed vehicle's wiring system. This can be important if the towed vehicle is equipped with an antilock braking system (ABS), since most vehicle manufacturers do not like the brake light wiring to be modified.

Wiring into the towed vehicle's wiring system
If you are going to use the towed vehicle wiring, the most practical thing to do is to purchase a light wiring kit from a tow bar manufacturer or an RV component supplier.

Do-it-yourselfers can procure individual components and tackle the project themselves. The most significant component is a diode that is installed in the wiring to prevent current from going "back" to the turn signal switch.

If in doubt about diodes and circuits, seek the advice of an RV service technician or automotive wiring specialist.