1969-1970 Mustang Wiring Harness

Painless 20122 wiring harness.

1969 Mustang wiring harness.

1970 Mustang wiring harness.

A factory upgrade, this harness is divided into five sections to include under dash, instrument panel, engine and tail sections, and additional circuits such as radio, courtesy lights and tach signal.

This 22-circuit fuse block complete with 12 modern micro mini fuses and 2 relays in a factory upgrade.

This harness follows OEM Ford color codes and OEM routing, making this harness the Painless solution to rewiring your classic Mustang.

The majority of this harness comes pre-terminated with terminals and connectors installed, new light sockets are installed for the marker lights and taillights.

Wires which are not pre-terminated by Painless are wires that may be specific according to your model of 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 Painelss kit to make these specific connections.

New door switches are also provided to replace worn out factory switches.

Number of Circuits: 22 Fuses w/ Horn Relay, Accessory

Relay and Maxi Fuse

Harness Length: Factory Fitment

Fuse Type: Mini Blade & Maxi Fuse

Firewall Passthrough: Grommet

Color Code Based: Factory Ford

Circuit Designations: Printed on Wires


Voltage regulator

starter solenoid


right and left turn/park lights

right and left headlight (including seperate high beam connections for the 1969 models)

right and left maker lights

right and left horns

front ground

washer pump

brake warning switch


Wiper motor

reverse switch

neutral safety switch

electric choke


temperature sending unit

oil pressure sending unit

aftermaket tach signal


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


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

includes connections for a console light

gear indicator light

cigarette lighter

heater and A/C


interior ground

map light

factory clock

tachometer and after market tachometer

fuel gauge

oil gauge

temp gauge



brake warning light

gear indicator light

Painless 20122 1969 1970 Mustang wiring harness PAINLESS-PERFORMANCE-20122
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