
27-Circuit Classic-Plus GM Truck Chassis Harness 1973-87 Chevy/GMC Truck 2WD/4WD
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- 27-Circuit Classic-Plus GM Truck Chassis Harness
- 1973-87 Chevy/GMC Truck 2WD/4WD
- GM Column Ignition Switch Connection
- Factory Replacement
Number of Circuits: 27 Fuses w/ Horn Relay & Maxi Fuse
Harness Length: Factory FitmentFuse Type: Blade & Maxi Fuse
Firewall Passthrough: Bulkhead Connector
Color Code Based: Factory GM
Connectors Included: Ignition switch, headlight switch, dimmer swtich, wiper motor, blower switch, blower motor, blower resistor, instrument cluster and headlights, 10SI & 25 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.
Circuit Designations: Printed on Wires
This harness includes circuits for:
- Headlight Switch- Power to headlight switch. Power wires out of headlight switch to head light dimmer switch, tail lights, dash lights and park lights. Preterminated connector.
- Dimmer Switch wires include power from headlight switch and power out to low and high beam headlights. Preterminated connector.
- Wiper Switch- Power to wiper switch. Wires to wiper motor and washer motor.
- Turn Signal Switch- Power into and out of your column mounted turn signal switch. Preterminated connector.
- Ignition Switch- Power into and out of to fuse block (ignition, crank and accessory). Preterminated connector.
- Brake Switch- Power into and out of brake switch. This includes a third brake light wire.
- Courtesy Lights- Power and ground circuits for dome light activation.
- Alternator- Charge wire and alternator field activation wires. (Most alternators can easily be wired up to this Painless harness). Included in kit is a high output alternator wire that allows you to use up to a 140 Amp alternator. Connector included in parts kit.
- Horn- 40 Amp horn relay mounted to fuseblock
- Radio- Harness includes constant B+ (for preset memory) and ignition hot circuits for any aftermarket or factory radio. Also included are two pairs of speaker wires.
- Starter- Crank signal wire for starter solenoid.
- Engine section wires including electric choke, coil power, coil to tach signal, oil pressure, engine temperature, and A/C compressor clutch control wire. HEI connectors included in parts kit.
- Headlight section wires including right and left high and low beam headlights, turn signals and park lights. Preterminated connector.
- Tail section wires including tail lights, brake lights, turn signal lights, fuel gauge sender, third brake light, and reverse lights.
- Dash panel section wires including fuel, temperature, oil pressure, voltage, tachometer, speedometer, high beam and turn indicators and gauge illumination. Preterminated connector.
- Door section wires including power windows and locks.
- A/C Heat- section including preterminated connectors for blower switch, blower motor and blower resistor block.
- Accessory section wires including cruise control power, power antenna, electric fuel pump and a cigarette lighter/accessory output.
- Also included in kit is a 4 & 7-inch zip ties, 70 Amp maxi fuse and a large assortment of crimp style connectors.
Direct-Replacement Wiring
Painless GM Truck Chassis Harnesses make re-wiring your Chevy/GMC truck simple. By adding a factory-style bulkhead connector and additional GM connectors Painless makes a variety of custom-fit wire harnesses for popular GM/Chevy pickups. Nothing could make re-wiring your 2x4 or 4x4 truck any easier. These quality harnesses include a pre-terminated fuse block and high temp, color-coded wiring.









