Select Your Vehicle

Select by Brand

Get Email Exclusives

Sign up for email updates on the latest exclusive offers

Body Wiring Harness

 Shop Body Wiring Harness

The cables and wires that make up a body wiring harness are used to route electricity to different vehicle components. Each wire is linked to a device. So whenever you flick on the switch or push a button, vehicle lights and accessories are powered up easily. When the lights of the vehicle flicker or when the power windows suddenly won't roll up or down easily, you'll have to check the wires and connectors. If you find burns or rough spots on the wire or a connector that's shot, you may have to yank the harness out and put in a new one to prevent electrical problems. Get a new assembly of wires. With a fully functional body wiring harness, you can turn on the headlights for better visibility and lighting conditions, switch on the radio anytime you feel like singing or getting the latest news reports, and have the power windows rolling up and down at a push of a button. Power to the accessories is right within your fingertips. Push the right buttons or flick the right switches and let the wiring harness do the rest.

When in the market for a replacement, look for a harness that meets the power requirements of your car accessories and one that matches your vehicle's specifications. Once you have this on hand, get ready installing this new wiring component. Here are the steps:

Installing a new body wiring harness

Tools and materials:

  • Masking tape
  • Jack and jack stands
  • 1/4-inch socket set
  • Screwdriver set

Step 1: Use masking tape for labeling the various wire connections. The wires are usually color-coded, but if they're faded or you're not familiar with the codes, consult a manual for the wiring diagram. It may also help if you snap pictures of these wire connections, along with their routing.

Step 2: Remove the battery from the vehicle after disconnecting it. With a socket wrench, unplug the terminal clamps as well as the hold-down brackets on the battery. Start with the negative terminals before removing the positive side.

Step 3: Disengage the main connection of the body wiring harness. With a small screwdriver and socket wrench, remove the clips and retainers that seal the harness. You then have to unplug the starter wiring and alternator. Be careful not to cause any damage or breaks on engine connections.

Step 4: Jack up the vehicle and support it with the jack stands. Once all set, you have to disconnect the wiring underneath the engine. Pull out these connections.

Step 5: Fit in the new body wiring harness after sorting the wires. After this, you have to route these wires. Be sure to keep these away from hot pipes on the exhaust and other engine parts. Once the wires are sorted and routed and the harness is installed properly, you can finally reconnect the battery.

Step 6: Run the engine and then switch on the vehicle lights and other accessories to check if the harness is installed the right way. If some accessories won't work, check the wiring connections and make the necessary adjustments.

Body Wiring Harness Articles

  • Replacing the Old and Busted Body Wiring Harness

    The cables and wires that make up a body wiring harness are used to route electricity to different vehicle components. Each wire is linked to a device. So whenever you flick on the switch or push a button, vehicle lights and accessories are powered up easily. When the lights of the vehicle flicker or when the power windows suddenly won\'t roll up or down easily, you\'ll have to check the wires and connectors. If you find burns or rough spots on the wire or a connector that\'s shot, you may have to yank the harness out and put in a new one to prevent electrical problems. Get a new assembly of wires. With a fully functional body wiring harness, you can turn on the headlights for better visibility and lighting conditions, switch on the radio anytime you feel like singing or getting the latest news reports, and have the power windows rolling up and down at a push of a button. Power to the accessories is right within your fingertips. Push the right buttons or flick the right switches and let the wiring harness do the rest.

    When in the market for a replacement, look for a harness that meets the power requirements of your car accessories and one that matches your vehicle\'s specifications. Once you have this on hand, get ready installing this new wiring component. Here are the steps:

    Installing a new body wiring harness

    Tools and materials:

    • Masking tape
    • Jack and jack stands
    • 1/4-inch socket set
    • Screwdriver set

    Step 1: Use masking tape for labeling the various wire connections. The wires are usually color-coded, but if they\'re faded or you\'re not familiar with the codes, consult a manual for the wiring diagram. It may also help if you snap pictures of these wire connections, along with their routing.

    Step 2: Remove the battery from the vehicle after disconnecting it. With a socket wrench, unplug the terminal clamps as well as the hold-down brackets on the battery. Start with the negative terminals before removing the positive side.

    Step 3: Disengage the main connection of the body wiring harness. With a small screwdriver and socket wrench, remove the clips and retainers that seal the harness. You then have to unplug the starter wiring and alternator. Be careful not to cause any damage or breaks on engine connections.

    Step 4: Jack up the vehicle and support it with the jack stands. Once all set, you have to disconnect the wiring underneath the engine. Pull out these connections.

    Step 5: Fit in the new body wiring harness after sorting the wires. After this, you have to route these wires. Be sure to keep these away from hot pipes on the exhaust and other engine parts. Once the wires are sorted and routed and the harness is installed properly, you can finally reconnect the battery.

    Step 6: Run the engine and then switch on the vehicle lights and other accessories to check if the harness is installed the right way. If some accessories won\'t work, check the wiring connections and make the necessary adjustments.