21 Circuit Classic Customizable Muscle Car Harness

Painless Performance 21 Circuit Classic Customizable Muscle Car Harness Painless Performance 21 Circuit Classic Customizable Muscle Car Harness
  • Year: Universal
  • Make: Universal
  • Model: Universal
  • Engine: Carbureted or Any Stand Alone Fuel Injection
  • Trans: Any

This harness is formerly known as our 12 circuit kit. Click here to read about the recent changes.

This 21 circuit kit is adaptable to fit the 1960's, 70s, or 80s GM, Ford, and Chrysler muscle cars where a bulkhead connector is required. Some minor bulkhead modification may be required. Please be sure to check out all of our harnesses in this section, as we may have an offering for a more direct fit harness for your vehicle. Included with this harness are the following parts; GM turn signal & column mounted ignition switch connectors; pre wire plugs for the headlights & dimmer switch; and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation.

  • Number of Circuits: 21 Circuits - 12 Fuses w/ Horn Relay and Maxi Fuse
  • Harness Length: Universal
  • Fuse Type: Blade & Maxi Fuse
  • Firewall Passthrough: Bulkhead Connector
  • Color Code Based: Universal
  • Circuit Designations: Printed on wires

This harness includes circuits for:
A/C & Heat
Backup Lights
Brake Lights
Dome Light
Electric Choke
Emergency Flashers
Fan Relay Activation Power
Fused Power Source
Horn (Relay)
Ignition Coil
Instrument Panel Lighting and Gauges*
Park Lights
Radio/Clock (Constant and Switched)
Tail Lights
Third Brake Light
Turn Signals

* Including Wires For: Fuel Gauge, Oil Gauge, Speakers, Tachometer, Temperature Gauge, Voltmeter

Working on a 1967 El Camino. Taking on such a big task is a little terrifying for me. Talk about an EASY kit to install! Only hand one question and the tech line was VERY helpful. Old school customer service. They took the time to make sure my questions were answered. Great kit, awesome service. Truly Painless! THANK YOU!!!! - Brian H, 8/23/2014

i bought this kit to wire up 1970 camaro and it was ez to do .i like the look of the factory bulkhead conector.very nice wire kit.very nice to work with would recomend to any one rewiring and a car. - mike minich, 11/30/2009

I bought one of your chassis wiring harnesses and put it in my '77 Camaro. When I powered it up everything worked. When it comes to electrical, I'm a complete moron & I managed to do it without learning a thing! It's still a mystery to me. How cool is that? Great product. Thanks. - Dave George, 7/27/2009

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