Speedway GM Internally-Regulated Alternator Wiring Harness
Speedway GM Internally-Regulated Alternator Wiring Harness
Speedway Motors

|

#91064100

Speedway GM Internally-Regulated Alternator Wiring Harness

50 Reviews

|

2 Questions

  • Ready to plug into '73 & up GM internally regulated alternator
  • Special diode prevents engine run on so you do not have to upgrade to a more modern ignition switch when upgrading to an alternator
  • Diode is pre-installed and protected with heat shrink

See More

$36.99

each

In Stock


Quantity

Need Help? Call to Order

Add to a list

Share

Select a vehicle to verify Fitment

Select Vehicle

Product Summary

Universal Fit, 8" Overall Length

  • Ready to plug into '73 & up GM internally regulated alternator
  • Special diode prevents engine run on so you do not have to upgrade to a more modern ignition switch when upgrading to an alternator
  • Diode is pre-installed and protected with heat shrink
  • Plug and play

See more details

Key Specs

MFG. Part #91064100
BrandSpeedway Motors

See more specs

Need To Know

Free Shipping on Orders Over $149

Shipping Policies & FAQs

Need help?

855.313.9176
View the Help Center

Quick and Easy Returns

Return Policy

Speedway Motors 91064100 Details

If you're hanging a common internally regulated GM alternator on your ride, you had better cough up the bucks for this problem solver. If you just wire-up the alternator with any old "parts store" plug you will have a nasty little surprise in store for you... the engine won't shut off!

When wired incorrectly the alternator will back feed juice to the ignition switch and keep your hot rod running. NOT COOL! This harness fixes that problem and will make you the hero of the drive-in.

This adapter plug does not work with "one-wire" alternators. It is not needed. This adapter plug works with GM alternators with the built-in regulator, typically from 1971 or newer cars and trucks, like our 91367163 or 91067150.

Charts

Speedway Motors 91064100 Specifications

KEY SPECS
MFG. Part #91064100
BrandSpeedway Motors
GENERAL
Overall Length8"
Sold in QuantityEach
NotesNot for use with one-wire alternators.

Ratings & Reviews

4.8

50 Reviews

Customers say

The product, an alternator wiring harness, is widely praised for resolving engine run-on issues and making alternator updates and conversions simple and efficient. Users particularly appreciated its internal diode, superior to many competitors without this feature, ensuring no backfeeding. Its usability underscores its quality, with customers repeatedly commending the ease of installation and plenty of wiring included, which allows flexibility in routing. Beyond that, customers found the product well-made and of excellent quality, despite some comments on it being a bit overpriced. Moreover, the product's performance is reliable, providing effective solutions to otherwise complex problems such as converting from a generator to an alternator. The product's success implies it could be explicitly recommended to those facing similar installation or conversion challenges.