Some of the fancier trucks on the road come with towing mirrors that have some elaborate options built into them. One of these options is turn signals. These turn signals/directionals can be built into the glass itself or molded into the mirror’s plastic housing. Being that these are higher-end mirrors, these types of trailer tow mirrors often have other options, like puddle lights and heat. As you can imagine, as the options stack up, the price follows.

Some trucks were never built with a turn signal mirror option, yet the truck owners want them. Luckily for them, the mirror manufacturers are listening and creating mirrors with extra long wires that splice into the truck’s turn signal harness. This may sound complicated, and it can be, but if you are the type of person that really enjoys cool features and additional safety when towing, then it is totally worth it. If a truck did have this option from the factory with the standard size mirrors, the larger tow mirror wiring harnesses are often designed to plug right in without any drama. Unfortunately, this completely depends on the year, make, and model of the truck.