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Classic Auto Fuse Series Dash Harnesses

Now Available for 1967-1978 Chevy Trucks

M&H Part 40383 Chevy Truck Classic Auto Fuse Series Dash Harness
Factory Replacement Style Dash Harnesses with ATO Type Fuse Blocks
No cutting, modifying or altering of any sort required

Our new Classic Auto Fuse Series Dash Harnesses allow the professional restorer to maintain the plug and play functionality of the original factory type harnesses, while converting the entire fuse block to an Auto Fuse Series (ATO Type) fuse block. The Classic Auto Fuse Series Dash Harnesses give restorers the flexibility to add additional power circuits, without the installation headaches normally associated with this type of fuse box conversion.

The plug and play Classic Auto Fuse Series Dash Harness are a first in the industry. Don’t be fooled by clever advertising and claims by others that their do-it-yourself harnesses are easy to install. There is no other product like this on the market, anywhere.

There is no cutting, modifying or altering of any sort required. Just plug it in and turn it on, it’s that simple. The Classic Auto Fuse Dash Harnesses are completely compatible with the remaining harnesses in the car; couple that with our world renowned Free technical support for the finest product money can buy.
ATO Type Fuse Box
ATO Type Fuse Block

ATO Type Fuse Block with additional, fully integrated power ports allows the restorer to easily tap power for aftermarket electronic devices such as electric radiator fans, fuel pumps & ignition boxes.

Original Factory Bulkhead Connector
Original Factory Bulkhead Connector

An Original Factory Bulkhead Connector is used on the back of the ATO Fuse Block. This allows the restorer to maintain the plug & play functionality of factory original style Engine & Forward Harnesses.

OEM Type Connectors
GXL Wire & OEM Connectors

We use U.S.A. made GXL wire which is much more tolerant to heat than the original GPT type wire that was used from the factory. Wire colors match the original factory specs, as does every connector and terminal.

Check Out These Outstanding Features

  • Easy Installation
    The Classic Auto Fuse Series Dash Harnesses install just like the factory originals. No modifications are required to any of the other harnesses in the car. Stock wiring diagrams and Assembly Manuals can be used to aid in the installation, as the wire colors match the original GM color code specifications.
  • Upgraded Main Power Circuits
    The main power circuits have been upgraded to ensure the extra capacity of the new Classic Auto Fuse Series fuse block. No need to worry about splicing on to existing fuses and circuits for aftermarket type accessories and overloading the fuse.
  • One 30 Amp Fuse Port
    This port can be used for power seats, power windows, power door locks or other accessories. This port has a maximum fuse capacity of 30 amps.
  • Three Separate 25 Amp Fuse Ports
    These three ports can be used for a single electric radiator fan, a dual electric fan setup, an electric fuel pump or other accessories. Each of these ports has a maximum fuse capacity of 25 amps.
  • One 20 Amp Fuse Port
    This port can be used for an electric water pump or other accessories. This port has a maximum fuse capacity of 20 amps.
  • One 40 Amp Circuit Breaker Port
    This port can be used for power seats, power windows, power door locks or other accessories. This port is designed for a circuit breaker, but a fuse may be used in place of a circuit breaker should you choose to.

Optional Items for Classic Auto Fuse Series Dash Harnesses


6-Way Accessory Fuseblock Kit
6-Way Accessory Fuseblock Kit
M&H Part Number: 41359

Adds six additional ATO fuse positions for aftermarket accessories or other circuits when more fused capacity is needed. The fuse block mounts directly to the 40mm rails on compatible Classic Auto Fuse Series fuse blocks and includes configurable terminal bus bars for flexible circuit distribution.

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11-Way Connector And Terminal Kit
11-Way Connector And Terminal Kit
M&H Part Number: 41355

Provides a secure 11-circuit disconnect for added electrical accessories. The female connector mounts to the 40mm fuse block rails, allowing the mating connector to be plugged or unplugged while the mounted half remains securely in place for convenient service.

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15-Way Connector And Terminal Kit
15-Way Connector And Terminal Kit
M&H Part Number: 44305

Provides a convenient multi-circuit disconnect for aftermarket accessories and electrical equipment. Up to 15 circuits can be connected through a single disconnect or separated into 11-way and 4-way groups, with the assembly mounting directly to compatible 40mm fuse block rails.

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Dual Relay Adapter Kit
Dual Relay Adapter Kit
M&H Part Number: 44304

Provides an organized way to add one or two relay-controlled electrical accessories, including electric fans, fuel pumps and auxiliary lighting. The adapter mounts directly to compatible 40mm fuse block rails and may also be used as a stand-alone in-line relay assembly.

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Front Of Fuseblock Accessory Connector Kit
Front Of Fuseblock Accessory Connector Kit
M&H Part Number: 41358

Includes indexed connectors and terminals that plug into dedicated accessory ports on the front of the Classic Auto Fuse Series fuse block. The color-coded connections make it easier to add accessories to the proper power source while helping prevent connections to the wrong cavities.

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Fuse And Flasher Kits
Fuse And Flasher Kits
M&H Part Numbers: 40355, 40356 & 40357

Complete fuse, flasher and circuit breaker assortments matched to 1967-1978 Chevy Truck Classic Auto Fuse Series Dash Harnesses. Three kits cover 1967-1972, 1973-1974 and 1975-1978 applications and include the required ATO fuses, turn signal and hazard flashers, circuit breakers and spare fuses.

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Junction Block And Connector Kit
Junction Block And Connector Kit
M&H Part Number: 44306

Creates a clean, organized connection point for multiple accessories using five indexed, color-coded connectors. The junction block can distribute a common feed or separate power and ground circuits, mounts to compatible 40mm rails and may also be used as a stand-alone in-line junction block.

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Relay And Connector Kit
Relay And Connector Kit
M&H Part Number: 41356

Adds a heavy-duty SPDT relay and removable 5-way relay connector for controlling higher-current electrical accessories. The connector mounts to compatible Classic Auto Fuse Series fuse block rails and includes the required terminals and secondary lock for a secure, serviceable installation.

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Spare Fuse Holder
Spare Fuse Holder
M&H Part Number: 44800

Keeps up to five spare ATO fuses organized, protected and readily accessible near the fuse block. The covered holder mounts directly to compatible 40mm rails for a clean, integrated installation and convenient access when a replacement fuse is needed. Spare fuses are not included.

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