Year Make Model | Painless Performance
Made in the USA
Open today at 8AM CDT
Easy To Read Printed Wiring
21 Circuit Pro Street Chassis Harness w/Switch Panel By Painless Performance
Made In USA
P/N 50003 $549.99
21 Circuit Pro Street Chassis Harness w/Switch Panel



Recommended for You
P/N: 50001
P/N: 50001
10 Circuit Race Only Chassis Harness
P/N: 50002
P/N: 50002
21 Circuit Pro Street Chassis Harness
P/N: 50005
P/N: 50005
10 Circuit Race Only Chassis Harness w/Switch Panels
P/N: 30201
P/N: 30201
Hot Shot Plus w/engine bump switch
P/N: 30202
P/N: 30202
Hot Shot
P/N: 30203
P/N: 30203
Remote Starter Solenoid
P/N: 50105
P/N: 50105
High Amp Alternator Shutdown Relay

  • App
  • Specs

If you are looking for a switch panel and harness to keep your racecar streetable, this 21 circuit harness and switch panel combo is for you. As with all of our chassis harnesses this kit has all the wires labeled and is pre terminated at the fuse block for easy installation. This harness includes an optional connector if you want to use a GM column mounted ignition switch. The included switch panel is a roll bar mount 8 switch rocker panel. This panel is prewired and is a direct plug and play into this harness. Also Included is a painless mounting plate, grommets, terminal assortment kit, and the necessary connectors for your turn signal switch, headlights, and alternator. Each wire is custom printed with the circuit identification as well as using GM color codes for easy installation.

Panel Dimensions: 10.75" L x 3.25" W x 3" H

The switch panel is prelabed for the following:

Electric Fan
Fuel Pump #1
Fuel Pump #2 / Accessory
Water Pump 



WarningProp 65 Warning
Hazardous Material Warning

WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit

Link to P/N:
Make: "Relay Kit" -"Headlight" "Relay Bank"
Model: "Powerbraid Chassis" "Tool"
Engine: Carbureted or Any Stand Alone Fuel Injection
Trans.: Any

Number of Circuits: 21 Circuits - 12 Fuses w/ Horn Relay
Harness Length: Universal
Fuse Type: Blade & Maxi Fuse
Firewall Passthrough: Grommet
Circuit Designations: Printed on Wires

This harness includes these circuits:

  1. Accessory #1
  2. Accessory #2
  3. Brake Lights
  4. Charging
  5. Dome Light
  6. Electric Fuel Pump #1 
  7. Electric Fuel Pump #2 
  8. Electric Water Pump 
  9. Emergency Flashers
  10. Fan Relay Activation Power
  11. Fused Power Source
  12. Headlights
  13. Horn
  14. Ignition Coil
  15. Park Lights
  16. Radio and Gauges
  17. Starting
  18. Tail Lights
  19. Third Brake Light
  20. Turn Signals
  21. Wipers 

* Including wires for:
Fuel Gauge
Oil Gauge
Temperature Gauge