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25 Circuit Classic-Plus Customizable 1969-74 GM Muscle Car Chassis Harness By Painless Performance

P/N 20102

25 Circuit Classic-Plus Customizable 1969-74 GM Muscle Car Chassis Harness

GM Column Ignition
       
 

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Year: 1969 - 1974
Make: GM
Model:
Engine: Carbureted or Any Stand Alone Fuel Injection
Trans.: Any
American Made

 

This harness is formerly known as our 18 circuit kit. Click here to read about the recent changes.

This 25 circuit harness was designed to fit 1969-1974 GM muscle cars. This harness features a pre-wired factory style bulkhead connector that plugs directly into the back of the fuse block in the factory location. Factory original quick connect terminals are included for the in dash printed circuit board.  Pre-terminated plugs for a column mounted ignition switch, dimmer switch, headlights & headlight switch, blower motor, wiper motor, and turn signal switch. Included with this harness you'll also find a detailed manual and each wire is custom printed with the circuit identification as well as using GM color codes for easy installation. 

Replacement Engine Harness

Replacement Engine Harness11 circuit for underhood section of Painless GM chassis harness 20102.Does
not include the bulkhead connector. Note:Will not fit factory GM harness.
21001 - only for 20102

Click the image for more info

 

 

 

 

Number of Circuits: 25 Circuits - 18 Fuses w/ Horn Relay & Maxi Fuse
Harness Length: Factory Fitment
Fuse Type: Blade & Maxi Fuse
Firewall Passthrough: Bulkhead Connector
Color Code Based: Factory GM
Circuit Designations: Printed on Wires
Connectors Included: Ignition switch, dimmer switch, headlight switch, blower motor, wiper motor and turn signal switch, 10SI & 12 SI Alternator, HEI Power and Tach and 20 Extra 56 Series Terminals for use with any Factory GM 56 Series Connector such as Headlight Switch, Wiper Switch or A/C Switch/Blower Motor.

This harness includes circuits for:

  1. A/C & Heat
  2. Accessory / Cigarette Lighter
  3. Accessory / Trunk Light 
  4. Backup Lights
  5. Brake Lights
  6. Charging
  7. Dome and Courtesy Lights
  8. Electric Choke
  9. Electric Fuel Pump
  10. Emergency Flashers
  11. Fan Relay Activation Power
  12. Fused Power Source
  13. Headlights
  14. Horn (Relay)
  15. Ignition Coil
  16. Instrument Panel Lighting and Gauges*
  17. Park Lights
  18. Power Door Locks
  19. Power Windows
  20. Radio/Clock (Constant and Switched)*
  21. Starting
  22. Tail Lights and License Plate Light
  23. Third Brake Light
  24. Turn Signals
  25. Wipers and Washer Pump

* Including Wires For:
Cigarette Lighter Light
Brake Warning Light
Fuel Gauge
Generator Light
Oil Gauge
Speakers
Tachometer
Temperature Gauge
Voltmeter

 25 Circuit Classic-Plus Customizable 1969-74 GM Muscle Car Chassis Harness By Painless Performance

 

 

ECM Flash Program

 

 

This is a basic start and run tune that we only recommend for a near stock application. We will only change the following parameters: delete VATS/PASS-KEY security, cooling fan on/off temperatures, rear end gear ratio, tire size, speed limiter, rpm limiter, idle rpm, and we will adjust the check engine light parameters. If your setup requires any other parameters tuned you will need to locate a local tuner. All ECMs are left unlocked to allow easy access for your tuner.

Step 1: Purchase one of the qualifying part numbers. See below for that list.


Step 2: If your part number is highlighted RED proceed to step 3B. If your part number is highlighted BLACK, proceed to step 3A.


Step 3A: If you have arrived at this step, your harness does not come with an ECM and you must provide one to be flashed. Please reference the manual with your harness to confirm the ECM part number required.


Step 4A: Once you have received your harness, please cut the Barcode label from the box as shown in the picture below.


Step 5A: Package and mail your ECM along with the Barcode label, a copy of your purchase receipt, and your ECM form that you are about to complete. (The address will be provided after you complete the form). We will pay for return ground shipping*. If you request a faster service, you will need to provide a return label.


Step 3B: If you have arrived at this step, your purchase comes with an ECM. You must fill out our ECM form BEFORE your purchase will ship. Proceed to Step 6.


Step 6: Click the “Start Here” button below to fill out our ECM questionnaire.


Step 7: Once we have the ECM, we will use the data from the form to flash the ECM. Then, once it has been flashed we will package the ECM and ship it back to you. If we encounter a question, we will contact you. This process can take 1-3 days.


Step 8: Once you receive your ECM, it is ready to go.

 

*Note: Our free return shipping is ONLY good for the lower 48 states, via ground UPS. If you are outside of those states, you must provide a return shipping label with your order. If your purchase comes with an ECM, the shipping will be covered via the retailer you purchased from.

 

 

Click the Start Here button below to get your FREE ECM Flash!

Click Here To Start The ECM Reflash Process

 

End Panel


APPLICABLE PAINLESS PART NUMBERS

60008

   

60522

60009

   

60523

60017

   

60524

60026

   

60526

60217

   

60608

60218

   

60617

60221

   

60700

60508

   

60701

60509

   

60702

60520

   

60710