Choosing An Automotive Wiring Harness
An automotive wiring harness carries power or signals between electrical components. Replacement harnesses are made for different circuits and positions: the selection includes lighting and backup-sensor harnesses as well as repair harnesses from more than one brand.
Start with the circuit and component being repaired. Compare the connector, terminal arrangement, harness route and vehicle equipment condition; two harnesses with similar plugs do not necessarily serve the same function.
Wires, Terminals And Harness Connections
A harness can include wires, terminals, connectors and protective covering arranged for a particular route. The connector joins the circuit to a component or another harness, while the covering helps protect the wires along that route.
Inspect for damaged insulation, loose or corroded terminals and strain at connection points. A warning light or an inoperative lamp can also involve the component, fuse or another part of the circuit, so locate the fault before choosing the repair.
Replacing Or Repairing A Wiring Harness
Some replacement parts cover a short section or connector, while others replace a larger harness section. The appropriate repair depends on where the damage extends and on the vehicle manufacturer's permitted procedure.
Route and secure the repaired harness as specified to avoid contact with hot or moving parts. Use the correct terminals and sealing method for the circuit rather than treating every connector as interchangeable.
Frequently Asked Questions (FAQ)
Is an ABS sensor harness interchangeable with a tail-light harness?
They connect different circuits and components. An ABS sensor harness must match the sensor and braking-system circuit; a tail-light harness is selected for the lamp circuit and its connectors. A similar plug alone is not sufficient.
Does the same number of connector pins guarantee a match?
Pin count is only one identifier. The connector shape, terminal positions, wiring functions and vehicle application must also agree. Two current tail-light listings have six-pin connectors but serve specific applications.
Does a wiring harness include the sensor or lamp?
A harness is the wiring portion of the connection; an individual harness listing should not be assumed to include the sensor, bulb or lamp assembly. Check the package contents for the specific repair.
Can a damaged connector be repaired instead of replacing the entire harness?
Some terminal or connector damage can be repaired when the wire and vehicle service procedure allow it. More extensive corrosion or damaged wiring may require a larger repair or replacement. Inspect beyond the visible connector before choosing the repair scope.
What can corrosion in a harness connector affect?
Corrosion or a poorly sealed connector can interfere with electrical contact and may damage the connected component. A Chrysler ABS service procedure calls for inspecting connector seals and the module for corrosion on affected vehicles.
