Wiring Harness Replacement: Your Step-by-Step Guide to Getting Started!

Like any project, whether you're tackling it yourself or hiring someone to do it for you, a little bit of research can save you time and money. First things first, always start with a plan! Changing your mind halfway through can lead to unnecessary costs and delays.

Next, research the repair shop, parts, and technical aspects of the task. Even if you don't fully understand everything, a basic understanding can help you avoid potential pitfalls. Lastly, set a realistic budget. If you find yourself trying to cut corners to save some cash, it's time to quit. Saving a few bucks now may cost you more in the long run with unexpected expenses. Remember, a little preparation goes a long way toward ensuring a successful, cost-effective project! I have a client with a unique way of discussing project budgets. He says, "If it's $3, I'm not interested. But $30 works for me. And if it's $300, we must chat."

Regarding your project, the type of wiring harness you choose can make all the difference. So, make your decision carefully! You have a few options: an OEM-style replacement, a classic update kit, or a universal kit. Each has advantages and disadvantages, and while we won't go into too much detail, we'll give you a quick rundown of each.

Factory OEM Replacement. Incorporating an OEM replacement harness maintains your vehicle's appearance and ensures compatibility with stock wiring without modifications. However, it is essential to note that the technology's performance in the harness is limited to the capabilities available at the time your vehicle was manufactured. Integrating accessories may pose a challenge due to the restricted power supply. Accessory harnesses, such as power windows or air conditioning, are typically sold separately and must be purchased individually. Most harnesses are not readily available, have extended lead times, and can be expensive.

Classic Update Type. Classic Update kits are designed for projects that require more circuits than would have been available in an original chassis harness. They provide updated fuses, connectors, and wire gauge sizes to accommodate higher-amp alternators and other components. Each kit includes everything needed to rewire a vehicle, from headlights to taillights.

Universal Harness Kit. A universal harness can handle the most demanding power requirements and accessories with flexibility in fuse box placement. It also allows you to customize your vehicle wiring to your performance needs. Most kits come with extended lengths of wire; however, components such as bulb holders, switches, and connectors are not included. They must be purchased separately.

From my experience, classic update kits designed for your specific vehicle type are a great choice overall. These kits typically include all the necessary components to rewire your vehicle completely. Plus, they can be installed to resemble original (OEM) wiring, offer cost savings, and allow upgraded accessories to be added. Best of all, you can easily find these kits from various vendors.

Here are some other things to keep in mind when planning your budget:

• One-Wire Alternator

• Turn-Signal Switch

• Parking/Taillight Assemblies

• Heater/AC Blower Motor

• Wiper Motor/Switch

• Fuel Sending Units

• Instrumentation

• Dash Control Switches

• Courtesy Lights and Switches

• Battery Cables

• Starter

• Radio and Speakers

These items can typically be installed with the harness at a low labor cost. While most of these components are easy to access during the harness installation, remember that installing a new part will cost the same labor as a used one. Remember the necessary harnesses and switches if you have power options, such as windows, seats, or a convertible top.

Consider Your Installation Options. When you're thinking about installing it yourself for a DIY project, it's essential to do your research beforehand. Remember that special tools, component failure, and rework due to mistakes or long, late-night hours will add to the overall cost as a "Hidden Cost."

If you'd rather leave the work to the professionals, take some time to look into different shops. Check out their reviews, see how much experience they have, and look at their past work. Shops specializing in vehicle electrical repairs are usually more efficient and provide higher-quality installations than shops offering a wide range of mechanical services. Don't just go for the cheapest option when choosing a shop. Make sure to compare their workmanship to the quoted price. Remember, you get what you pay for!

If you're considering upgrading your vehicle's wiring system—whether you're doing it yourself or hiring a pro —don't hesitate to contact Faulk's Classic Car Repair with any questions! 😊 faulkccr.com