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To legally flat tow your vehicle you must ensure that it is properly wired and connected to your RV. Your towed vehicle's signal lights must act in accordance with the brake and turn signal lights on your RV or tow vehicle. There are four basic ways that you can achieve this:
If you only tow your car every once in a while, a removable light kit is probably the best. The least invasive of the tail light wiring kits, removable lights won't affect your towed car's electrical system at all. These self-contained add-on lights mount on your towed car and connect directly to your RV. Wiring is routed beneath your towed car up to your RV and is then connected to your RV to get the signal lights required. Upon receiving signals from your RV, they function as brake, running and turn signal lights.
There are a couple of different ways that these add-on lights can attach to your vehicle.
Magnetic tow lights typically sit atop your towed car's trunk or roof, whichever offers the best visibility and most secure positioning. The bases of these lights have heavy-duty magnets that are designed to stay firmly in place on your towed vehicle's exterior.
Trunk-mount lights function the same as magnetic tow lights, but instead of mounting on top of your trunk, they are closed into it. Each of these lights has a bent bracket that is designed to sit around the lip of your open trunk. To secure the lights, simply close the trunk and the bracket will remain between the edge of the trunk and the lid.
Tips for using removable tow lights:
A bulb-and-socket kit offers a more permanent solution for wiring your towed vehicle. Installation involves mounting a separate bulb and socket inside each tail light housing of your towed car. These bulbs will serve as your towing lights. Wiring is routed beneath your towed car up to the front and then connects to your RV to get the signal lights required. You need 1/4" space of clearance between the bulb and the lens.
Tips for using bulb-and-socket kits:
The traditional method of wiring your towed vehicle to ensure that its signal lights will act in accordance with your RV's lights while it is being towed, is to use a diode kit. This method requires a more involved installation process, but once complete you never have to re-mount, set up or manually activate a thing.
Hardwire diode kits can include:
Kits that include either four or six diodes that splice into your towed car's wiring are the most common tail light wiring kits.
Installation of diodes can be rather involved. Watch a video demonstration of this process to get a better idea of the installation procedure.
You must splice into your towed vehicle's wiring to install diodes. They are designed to be connected in line with the car's circuits. To determine exactly how this is done, first you need to know what type of lighting system your car has.
Combined or 2-Wire Lighting System
Separate or 3-Wire Lighting System
Once you have determined the type of lighting system your vehicle has, you can begin installing your diodes. Detailed instructions on how to splice diodes into your towed car's existing wiring can be found in the following articles:
Block-style diode kits are also available. Installation with a block diode system is less complicated, but may be more time consuming because you must find a place to mount the block where all of the wires can reach. With the block diode system you can wire your towed vehicle as either a combined or a separate system.
Tips for using hardwire diode kits:
The newest and simplest way of wiring your vehicle to be towed is to use a custom-fit wiring harness that plugs into your tow vehicle's existing tail light wiring harness. These custom harnesses function just like the diode systems, but require no cutting or splicing of wires.
The control module on the TowDaddy wiring harness has built-in LEDs to help with installation. These lights ensure that you install the system correctly and also make for fast, easy troubleshooting.
Hook up to your RV to power the TowDaddy and make sure that the...
Tips for using custom, plug-in kits:
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