Making an auto wiring harness can be a challenging but rewarding project. You will need some basic tools and materials, such as wire cutters, strippers, crimpers, soldering iron, heat shrink tubing, electrical tape, connectors, fuses, relays, etc. You will also need a schematic or diagram of your vehicle’s electrical system and the components you want to connect.

There are different methods and steps for making an auto wiring harness depending on your specific needs and preferences. However, here is a general overview of how to make one at home:

1.Study your schematics carefully and identify the wires you need for each circuit (e.g., power, ground, accessory, speaker, etc.)

2.Lay out your old harness on a large work surface and label each wire with its function and color code

3.Decide where to mount your fuse block and relay panel in your vehicle and measure the length of wire you need for each circuit

4.Take note of how the wires are routed in your car and avoid areas that may cause damage or interference (e.g., heat sources, moving parts, sharp edges, etc.)

5.Decide which wires go where on your fuse block and relay panel and mark them accordingly

6.Replicate your routing on your workstation and secure the wires with tape or zip ties

7.Separate, protect, and secure each circuit with heat shrink tubing, electrical tape, or conduit

8.Source old connectors from junkyards or online stores or begin making your own with crimp terminals or solder joints

9.Test each circuit for continuity and polarity before installing it in your car.

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