Menu

Shop

Garage

Cart

Account

Products to Compare (max of 3)
X
Compare These Parts

Speedway Economy 12 Circuit Wiring Harness

2/15/2017
Add Article To List

In this Tech Tip, John answers a customer question about the Speedway 12 Circuit Wiring Harness.

“I’ve got a 1947 Chevy Fleetline Aerosedan that came with a 1982 Olds Cutlass Engine with a 12 volt battery. The starter switch, battery and alternator are all hooked up and functioning but none of the lights or gauges function. Will your Economy 12 Circuit Wiring Harness work for me? I just want to hook up the front lights, brake lights, rear lights to a light switch, and maybe the gauges that work off the 12 volt system. Also will it provide me with the length of wire to go front lights and rear lights? Plus allow me to hook up the lights and gauges? Will your kit provide me with everything I need, including the wires to the lights front and back? Thank you for your time.”

Hi, you inquired about our 12 circuit harness and it would be acceptable for your ‘47 Chevy’s requirements and have enough wire. If in the future you decide to add power windows, locks, cruise, and other accessories and run out of room you can always use inline fuses or another fuse block. On your gauges you will need to make sure they have 12 volt lighting and if the gauges are not mechanical, the oil, fuel, and temp gauges will require voltage reducers such as number 91064101. For the fan motor or radio you will need 91064103 if it is still 12 volt also. Feel free to visit us on the web at www.speedwaymotors.com or call 1-800-979-0122 with questions or to place an order.

  • John W.

Products Featured in this Article

Related Articles

Installing a Speedway Motors 22 Circuit Wiring Kit
by Jeff Karls - Posted in Tech
10/8/2020
This Chevelle project gets rewired with a Speedway Motors 22 Circuit wiring kit. Follow along as Jeff guides you through this application, starting with a good mounting location for the fuse box. Learn more on continuity, grounding and relays.
Converting a Hardwired Sinclair Sign to Plug-In
8/1/2018
Are you a collector of automotive signs? This is a DIY project where you will learn how to convert a hardwired sign to a plug in. Jess M. explains each step to get the job done!
Wiring Harnesses for a 1929 Ford
by John Wulbern - Posted in Tech
7/21/2017
In this Tech Tip, a returning customer asks for advice on wiring harnesses for his ’29 Ford roadster project.
EFI Fuel Tank for 1947 - 1954 Chevy Pickups
by Pat Orth - Posted in Videos
7/25/2017
We take a look at some parts going into a 1951 Chevy Truck project. We highlight a few key pieces including the 1947-1954 Chevy Truck EFI Fuel tank.
How Does a Line Lock Work | How to Do an EPIC Burnout
by Dan Schechner - Posted in Tech
6/5/2025
Learn how line locks can deliver the perfect burnout, along with tips on proper installation and how to use them.
What is The Best Fuel Injector For LS? Stock, Aftermarket, Decapped LS Injectors Explained
by James Elkins - Posted in Tech
5/22/2025
Are LS injectors confusing you? Comparing stock vs aftermarket vs decapped, we help you choose the right LS Fuel Injector Size & Connector!
NHRA Rules For Newbies & Drag Racing Safety Requirements
by Dan Schechner - Posted in Tech
5/21/2025
Gear up for your first drag race with this beginner’s guide to NHRA rules and required safety equipment.
What Is an HEI Distributor? Setup, Tuning Tips, and Pros & Cons
by Brian Caruth - Posted in Tech
5/15/2025
Learn how HEI distributors work, how to wire and install them, and why they’re a top upgrade over points ignition systems. Includes tips on testing, vacuum advance, and DUI distributor benefits.
Best Type of Mufflers to Create the Perfect Exhaust Note
by Mark Houlahan - Posted in Tech
5/14/2025
From glasspack, turbo, and chambered mufflers, to resonators, and more, which muffler is best for you? See our guide to learn more.
Axle Ratio Calculator | Calculate Ideal Tire Size & Rear Gear Ratio
by Mark Houlahan - Posted in Tech
5/13/2025
Easily calculate the best axle ratio or tire size for your build. Use our axle ratio calculator to match RPM, gear ratio, and tire diameter for optimal performance.