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Speedway Universal 20 Circuit Wiring Harness

Specs
Sold in Quantity:
Each
Number of Circuits:
20
Garage Sale:
No
Notes
Includes GM column plug, headlight switch, dimmer switch, and signal flashers. 18 circuits are fused. Leads to taillights are 17.00" feet long.
Speedway Universal 20 Circuit Wiring Harness
Speedway Universal 20 Circuit Wiring Harness
Speedway Universal 20 Circuit Wiring Harness
Speedway Universal 20 Circuit Wiring Harness

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Whether you're building an option loaded car or just want to have extra circuits available for future updates, this harness is perfect and makes any job painless. Compact 5-1/2"L x 4-1/2"W x 3-1/4"H  fuse block holds 18 standard push-in fuses and can be mounted almost anywhere.

Each high temperature wire is color coded and labeled every six inches. Also includes GM type steering column connectors. To keep costs down and the quality high, this harness does not include any switches, light sockets or plugs that you would normally already have.

  • Harness has 20 circuits, of which 18 are fused
  • Taillight leads measure 17' long
  • Includes plug for GM column, headlight switch, dimmer switch, and signal flashers

Wiring Harness Installation Instructions (PDF)

Note: This kit includes ribbon plugs to connect to most GM and aftermarket columns, in addition to including plugs to connect to the ignition switch on "keyed" GM columns.

Customer Reviews

Rated 4.7 out of 5 by 90 reviewers.
RATING BREAKDOWN
90 reviews
5 Stars
74
4 Stars
10
3 Stars
3
2 Stars
0
1 Star
3
RECOMMEND THIS PRODUCT:

A544man
Verified Purchaser
Turlock, CA, USA
Product Rating

Easy to use

February 14, 2015
The Wireing kit has what you need for most applications. It is easy to install with labeled wires. Most other things like power widows AC and radio come with their own Wireing.
Yes, I recommend this product.
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1949shoebox
Verified Purchaser
Tennessee
Product Rating

great harness for the price

February 10, 2015
Great value with all connectors needed... Only problem was a discrepancy in the diagram that had a brown wire going to the 12 volt in on the ignition switch and the red to the accessories terminal. These were reversed. Contacted Tech and they confirmed this indicating that they had several that left them with the switched diagram included. Go to Speedway web site for the correct diagram... Other than that all is great.
Yes, I recommend this product.
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quintin
Verified Purchaser
mn
Product Rating

great product and great price

February 04, 2015
great product will order it again. we do multiple project each year
Pros:
  • all labled
Yes, I recommend this product.
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ccsct203
Hamden, CT, USA
Product Rating

Great product

November 12, 2014
Great product Easy to use Great instruction... few errors Great Price
Pros:
  • cheap price
Cons:
  • several small issues not to worry about
Yes, I recommend this product.
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justatom
Verified Purchaser
west palm beach,fl.
Product Rating

nice harness!

October 28, 2014
i have installed many wiring harnesses & this is by far the easiest , with the most concise instructions
Pros:
  • nicely labeled
  • Easy
  • Good directions
Cons:
  • None
Yes, I recommend this product.
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Clark301
Verified Purchaser
Pennsylvania, USA
Product Rating

This product has great features

October 22, 2014
Great product. Not only is it color coded, but it is labeled. this also has directions, that are in color, and easy to understand. It made my project a lot easier!
Yes, I recommend this product.
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Clay58
Verified Purchaser
Knoxville, TN, USA
Product Rating

Very, very nice harness!

October 20, 2014
I honestly thought this harness would be a nightmare. But it is a great product. Wires are marked every 5 to 6 inches telling you what it goes to, also numbered to coordinate with the instructions which are very complete. Every time I would think I didn't have something, the instructions would say " included with kit". Sure enough, it would be in the box/bags. I would and have recommended this harness to several friends. Much, much easier than trying to figure out the "current" state of the wiring.
Yes, I recommend this product.
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Reztub
Wooster, OH 44691, USA
Product Rating

very well made, easy to install

October 22, 2014
This wiring harness is well made and has very accurate instructions. Color coding is easy and all components are easy to install, would recommend
Yes, I recommend this product.
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irishDave
Verified Purchaser
Hillsboro, OR, USA
Product Rating

great universal harness

October 03, 2014
This is my fourth or fifth re wire. First one was a 55 pontiac and since then I've only used this kit. Nice soft wire and very well labelled. Comes with great instructions even for the beginner. I would like it to have longer tail light wires, and only because i like to keep those tucked away nicely. Otherwise grwat product.
Pros:
  • complete with almost everything you will need
  • labelled well
Cons:
  • None
Yes, I recommend this product.
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dale55
Minnesota, USA
Product Rating

easy to use

October 01, 2014
put this harness on my 55 ford street-everything worked and fit--looks good
Yes, I recommend this product.
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Page 1 of 9
91064027

Product Q&A

72 questions : 105 answers

2 answers

Will this work with a 1955 DeSoto Specifically how can I make the wiring harness work with your gm column plug

LoSoto55
Syracuse, IN 46567, USA
March 01, 2015

Will this work with a 1955 DeSoto Specifically how can I make the wiring harness work with your gm column plug

Answers

March 10, 2015
Yamaha
The kit should have the adapters for any GM column wiring included.
March 02, 2015
EricM
On our wire harness 91064027 we include the GM ribbon plug if so needed. It can have the wires installed to match up with the GM style plug in many factory and aftermarket steering columns. The plug in is not installed so that the wires can be used on universal turn signal switches or other makes and models of columns. It is up to the installer to find wiring diagrams for the wires in their columns and our instructions detail which wire goes to what function.
2 answers

will this work with a 1978 231 buick

jj8129
February 23, 2015

will this work with a 1978 231 buick

Answers

March 14, 2015
1949shoebox
This is a universal wiring harness. It will work but will require the installer to carefully layout his circuits and adjust them accordingly to his car. It is not a car specific harness.
February 23, 2015
EricM
Yes this harness can work in your application. Be sure to check the number of circuits that your car requires. If you have a car with several power accessories such as windows, door locks, etc. you may want to get a harness that has a larger fuze box for more circuits.
2 answers

headlight switch knob The shaft of the headlight switch is about an inch too long for my dash. The obvious solution seems to be to remove the knob and trim the shaft. I removed the set screw from the knob, but it's impossible to get the knob off. The knob seems to be pressed onto the triangular-shaped shaft. I'm afraid I can't get it off without damaging the knob and/or shaft. Any suggestions?

bigmurf
michigan
February 19, 2015

headlight switch knob The shaft of the headlight switch is about an inch too long for my dash. The obvious solution seems to be to remove the knob and trim the shaft. I removed the set screw from the knob, but it's impossible to get the knob off. The knob seems to be pressed onto the triangular-shaped shaft. I'm afraid I can't get it off without damaging the knob and/or shaft. Any suggestions?

Answers

March 10, 2015
Yamaha
I have had the same problem, and a little heat may free it up enough to get off without ruining it. They are on there though.
February 20, 2015
EricM
If the knob will not come off without damaging there are a couple of choices. We do have replacement billet knobs as one, and the other is to shorten the opposite end and reshape and also put the groove back into the shaft. We apologize but there is not a shorter shaft currently available.
2 answers

Does the Speedway universal 20 circuit wiring harness include the fuses?

Papaduck
Lascassas, TN 37085, USA
February 01, 2015

Does the Speedway universal 20 circuit wiring harness include the fuses?

Answers

February 11, 2015
1949shoebox
yes fuses included
February 02, 2015
Tech
Yes they do come with fuses
2 answers

Power Windows?

JRockinIt
January 11, 2015

Power Windows?

Answers

February 11, 2015
1949shoebox
there is a circuit for the windows but you have to provide the wires and switches in the doors
January 12, 2015
EricM
This harness does not have a provision for power windows. We offer a 28 circuit Painless harness 910102010 that does have power window and lock provisions.
1 answers

Headlight Switch Does Speedway offer a wiper switch that would match the headlight switch that comes with this kit?

bigmurf
November 24, 2014

Headlight Switch Does Speedway offer a wiper switch that would match the headlight switch that comes with this kit?

Answers

November 25, 2014
EricM
We apologize but do not offer a matching wiper switch but we do offer a replacement knob that will be very close to the headlight switch under number 4465300 and if you want exact then we also have a matching knob for the headlight switch
2 answers

fuse block and headlite getting hot. I installed new harness in 1984 ford truck. It is burning up head lite switchs, fuse block gets hot and melts fuses to box. Any idea whats wrong? Thanks Ron

fordmanron
Sandyville,Wva
October 31, 2014

fuse block and headlite getting hot. I installed new harness in 1984 ford truck. It is burning up head lite switchs, fuse block gets hot and melts fuses to box. Any idea whats wrong? Thanks Ron

Answers

November 13, 2014
ccsct203
It sounds like to have a short to ground Check for a pinched headlight wire Issues like you are describing point to a high current draw Disconnect the headlight bulbs Remove fuse Turn on Headlight switch Check across fuse spades with a test light or meter If there is 12V there is a short
November 03, 2014
EricM
If you are burning out light switches and also fuses the first issue would be to make sure you are hooking up the power wire to the correct terminal of the switch. If using the factory Ford switch it definitely requires the factory relay to take the current surge. If using the aftermarket switch like in the kit and you have lights with large current draws a relay should also be used. Also if all the lights are not properly grounded the system will be hunting a ground creating a lot of resistance causing heat as described. When you briefly turn on the lights are they all at full brightness and if not there is a lack of sufficient ground. If running a dimmer switch it needs to be checked also as these can short out internally blowing fuses and burning up light switches. Check the dimmer on both circuits to make sure it is ok.
2 answers

Park lights work on rear but no brake or turn. Fuses are good grounds are good.

Carter
Tennessee, USA
October 30, 2014

Park lights work on rear but no brake or turn. Fuses are good grounds are good.

Answers

November 13, 2014
ccsct203
Connect the brake light switch wires together and check for output from the wire for the "third Brake light" . I you have output on this wire double check your wiring to the "high" lead of the brake/turn signal. (this harness is designed to work with rear light bulbs in which the brake light and the turn signal filaments are one and the same) If you have bulbs which have a separate turn/brake bulb or filament the use the 3rd brake wire for only the brake lights and the turn signal wires for only turn signals I'm trying this on my car and I don't know if it will work 100% but it's worth a try
October 31, 2014
EricM
Lack of brake and turn is more likely to be in the switch or the wiring hook up. If you are running all LED then the clamp on switch will not accept LED flashers and will require load resistors. Check power to the brake light switch and then going out to make sure operational. Then confirm turn signal wiring as they have different codes compared to the harness. When you have the turn signal turned to the right check power out from your switch to the right front light and right rear light. Then do the same with the left. With the brake pedal compressed check to see if you have power out of the switch and up to the turn signal assembly. If when the turn signals are on the front works and not the back it leads back to the switch and/or turn signal switch.
2 answers

How do I wire my electric choke? What provision is there to wire the electric choke on my SBC motor?

ccsct203
ct
September 20, 2014

How do I wire my electric choke? What provision is there to wire the electric choke on my SBC motor?

Answers

October 05, 2014
adamst
This has all the wires you need + some. I'm running a 750cfm Edelbrock with electric choke on my 347ci sbf.
September 22, 2014
EricM
We normally use the brown # 107 (from the accessory feed wires) for the electric choke.
2 answers

Speedway Universal 20 Circuit Wiring Harness vs Painless Why would anyone pay 2 and 1/2 times the price for a Painless harness when there is a speedway equivalent Am I missing something???

ccsct203
ct
August 31, 2014

Speedway Universal 20 Circuit Wiring Harness vs Painless Why would anyone pay 2 and 1/2 times the price for a Painless harness when there is a speedway equivalent Am I missing something???

Answers

October 04, 2014
ccsct203
I looked at Kwik 22 Circuit Second Generation Wire Harness as recommended.. wow was only $315.00 for the same product If I wanted to spend that much I would have bought a Painless I bought the Speedway for half the price It may not be the best but it worked great for my "hotrod" Bugeye Sprite with a SBC Anyone who needs an affordable harness which is backed by a great company....stay with the Speedway Good product and not over priced
September 02, 2014
EricM
You are correct. This harness was designed with with value for our customers in mind.
Page 1 of 8

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