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Since 1952

Painless Wiring 20122 1969-1970 Mustang 22 Circuit Wiring Harness

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Includes wiring harnesses, all connectors, brackets, flashers, and zip ties.
Painless Wiring 20122 1969-1970 Mustang 22 Circuit Wiring Harness

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What's in the Box

For a limited time, when you purchase any Painless Performance Chassis Harness or Fuel Injection harness, you'll receive a $100 rebate. Hurry, offer ends February 29, 2016!

This 22 circuit direct fit 1969-1970 Mustang harness has many of the factory connectors already installed on the harness out of the box.  This harness uses our unique covered micro-fuse block.  Also featured is an auxiliary circuit with 20 amp relay for accessories such as fog lights, or an electric fuel pump. Each wire is custom printed with the circuit identification as well as using Ford color codes for easy installation.

1969-1970 Mustang Wiring Instructions (PDF)


The majority of this harness comes pre-terminated with terminals and connectors installed; new light sockets are installed for the marker lights and tail lights. Wires which are not pre-terminated by Painless are wires that may be specific according to your model, engine, or  ignition system. These wires will be cut to length by the installer according to each particular application. Terminals and splices are provided with each Painless kit to make these specific connections. New door switches are also provided to replace worn out factory switches.

The '69-'70 Mustang harness is broken up into 4 main sections; each section contains specific component connections. These sections and componets are as follows:

  • HEADLIGHT SECTION - Voltage Regulator, Starter Solenoid, Alternator, Right and LeftTurn/Park Lights, Right and Left Headlight (including seperate high beam connections for the 69 models), Right and Left Marker Lights, Right and Left Horns, Front Ground, Washer Pump, & Brake Warning Switch
  • ENGINE SECTION - Wiper Motor, Reverse Switch, Neutal Safety Switch, Electric Choke, Coil, Temperature Sending Unit, Oil Pressure Sending Unit, & Aftermarket Tach. Signal
  • DASH SECTION - Right and Left Door Light, Right and Left Door Switch, Right and Left Pillar Lights, Dimmer Switch, Courtesy Lights, Headlight Switch, Turn Signal Switch, Brake Switch, Ignition Switch, Gauge Cluster Section (will do clusters with or without a factory Tach.), Wiper Switch, Console wiring (includes conenctions for a console Light, Gear Indicator Light, & Cigarette Lighter), Heater Switch, Radio, Interior Ground, Map Light, & Factory Clock
  • TAIL SECTION - Dome Light, Trunk Light, Fuel Sending Unit, Rear Ground, Right and Left marker Lights, Right and Left Reverse Lights, Right and Left Tail/Turn/Brake Lights, & License Plate Light

Includes Circuits for:

  • A/C & Heat
  • Accessory / Cigarette lighter
  • Accessory Relay
  • Backup lights
  • Brake lights
  • Charging
  • Courtesy and Dome lights
  • Electric choke
  • Emergency flashers
  • Fused power source
  • Glove box light
  • Headlights
  • Horn (Relay)
  • Ignition Coil
  • Instrument Panel lighting and gauges *
  • Park lights
  • Radio / Clock (Constant and Switched)
  • Starting
  • Tail Lights and license plate light
  • Turn signals
  • Wipers and washer pump

* Including wires for:

  • Aftermarket Tachometer
  • Ammeter
  • Brake warning light
  • Fuel gauge
  • Gear Indicator light
  • Oil gauge
  • Tachometer
  • Temperature gauge
  • Voltmeter



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Product Q&A

1 questions : 1 answers

1 answers

What engin does this harness work with. 5.0 carb?

Dallas TX
May 23, 2011

What engin does this harness work with. 5.0 carb?


May 25, 2011
This wiring harness by Painless is specific to the 1969 and 1970 Mustang and designed to work with engine options for those years only. For specific questions you can visit Painless Wiring website or give them a call.
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