How Much Does It Cost To Fix Headlight Wiring?


Hi, just letting you know that all products recommended here have been used by me, or are properly researched to ensure they are the best you are getting without bias.

I am also an affiliate for certain Amazon products and this means that some links here are affiliate links. If you purchase an item through any of them, I MAY earn a commission at no extra cost on you.

How much you spend on fixing any car headlight wiring or wires depends on such factors as the cost of the butt connectors, heatshank, soldering and the electric tape. These wires attract different prices which are determined by their qualities and material compositions.

However, all things being equal, it can cost between $200 to $700 to fix your vehicle’s wiring or wires no matter their type. In the rest of this post, I will


What is the average cost of fixing headlight wiring or wire problems?

The money you spend on fixing your vehicle headlight vary greatly and it’s really dependent on many things, which range from the kind of bulbs you require down to the make and model of your car. For instance, the average cost of an LED bulb is between $15 to $20, while HID bulbs cost from 100 dollars and above. Add the cost of the bulbs to that of the labour and you will get a reliable average evaluation of the total cost.

How much does it cost to replace vehicle headlight wiring?

Replacing a vehicle headlight wiring depends on whether it is the bulb that has a problem or the conducting wires. Essentially, therefore, what you end up spending will depend solely on what is the cause of the problem and how much you spend on buying any replacements.

It is thus easier and cheaper to change bad headlight components than to change the entire headlights. Additionally, any complaints you may have with your headlights can be easily solved through very convenient processes that are bound to save you a lot of money in the end.

Things to note before fixing a headlight wire?

Some of the things worthy of note before you start any headlight fixing are the nature of the problem and how it manifests,  which will tell you what is its cause and how to resolve it. You need to also know the tools you require as well as the type of headlight connector or the bulb base too.

Commonly available bulb bases are HB3, HB4, H1, H3, H7 and H11 for single filament bulbs, while the H4 size is mainly for dual filament bulbs.

Best DIY ways to fix headlight wire problem 

The headlight circuit of most car features four different components which are: the headlight bulb, the wiring harness (which brings power to the headlight bulb) and the fuse (which protects the circuit from any abnormal or unexpected power surges). Damage to any of these will manifest as a failure of your headlight to work.

To repair any of these components, if they develop any fault, is easy and quick to execute according to the steps explained below:

Step 1

To ascertain which one of your headlights has any issues, turn them on first and then turn them off too. See which one is not functioning and then, open up the hood or bonnet with the hood support rod.

Step 2 

Proceed to loosen the negative terminal nut of the battery using a crescent wrench and then lift the negative battery cable off its terminal.

Step 3 

Disconnect the wiring harness on the rear of the headlights system and check to see whether the contacts are clean on the headlight socks and the wiring harness. Then look for any discolouration or corroding.

Step 4 

Make sure that you brush the uppermost later of corrosion away,  with preferably a pencil eraser before you then spread a dollop of dielectric grease on all the contacts for the wiring harness, to guard against any future susceptibility to erosion.

Next, plug the wiring harness back into the headlight sockets, before you replace the negative terminal of the battery. Thereafter, turn on the headlights again. Should they still fail to work, proceed with the next steps, but if they are fine, you should stop right at this stage.

Step 5 

Initiate this step by first, opening up the car’s fuse box. Bring out the fuse that operates the car headlight circuit along with the headlight that is not working and check whether the fuse is blown.

Replace it, if it is blown, before you test the headlights again. If either of them does not still work, proceed with the next and final step again.

Step 6

In this stage, you must start by unplugging the headlight wiring harness from the non-functioning headlight and then connect the negative lead from the voltmeter to the negative terminal of the battery. Then, connect the positive terminal from the voltmeter to the positive wire on the headlight wiring harness.

The positive wire ought to have power running through it, verify whether that is so and if it is, replace the headlight bulb and turn it on again. If there is no power coming through the wiring harness,  continue with the next step.

Step 7

Trace the wiring candles back to the fuse box while looking for any tears in their insulation. Should you find any, disconnect the negative battery cable promptly once again. Then, cut the cable at two places, just before and after the tears with a wire cutter.

Proceed to now connect each wire in the cable once again with the aid of a solder sleeve connector over one of the wires. Braid the exposed leads of the wires by connecting positive to positive and neutral to neutral.

Finally, slide the solder sleeve connector to melt the solder inside the solder sleeve connector before turning on the lights. They ought to work after this, all things being equal.

How do you check headlight wires by yourself?

You can always replace the harness that brings power to your headlight yourself. This harness connects to the base of the headlight bulb and also the power distribution centre in the engine cavity through the following simple steps:

Step 1

Turn off your engine and open the hood or bonnet.

Step 2

Loosen the negative battery terminal with a wrench and lift the battery negative cable off it and put it aside. After that, wrap the end in pairing tape to prevent accidental reconnection while working.

Step 3

Press inward on the side tabs of the headlight wiring harness on the rear portion of the headlights assembly, and also pull the wiring harness from the rear headlights assembly.

Step 4

With the aid of wire cutters, cut off the wiring harness of the two wires it is attached to.

Step 5

Strip off one inch of insulation at the end of the two wires that you cut the wiring harness from.

Step 6

You should then slide the solder sleeve connector over the wires from the last step.

Step 7

Again, strip off one inch of insulation from the two wires from your replacement wiring harness too.

Step 8

Braid together the positive lead of your replacement wiring harness wire using the lead from the positive wire of the wires in step 5. Also, braid the neutral lead of the replacement wiring harness using the lead from the neutral wire of the pair of wires in step 5.

Step 9

Finally, slide the solder connector over the braided naked positive leads and heat the connection using a heat gun in order to melt the solder connector and seal off the connection. Also, repeat the entire process for the neutral wire too.

How can you fix a bad ground wire headlight?

Bad ground circuits cause headlights to dim or fail to operate entirely. They provide a pathway for the electricity from the headlight to return to the negative terminal of the battery. To fix any bad ground wire headlight, execute the following steps diligently:

Step 1

Take off the connector at the back of the headlight. It should consist of three wires and sometimes more or even less. If the wires are only two or three, one is the ground wire, while if they are four, two are ground wires.

Step 2

Trace these wires from the connector to as far as you can. Where one or two of these wires is connected to the chassis, you have essentially found your ground wire and it means you should proceed to the next section. If not, go to the next step.

Step 3

Turn on your vehicle ignition and then the headlights to the high beam.

Step 4

Thereafter, set the multimeter to the DC Volts so that it will measure 12 volts, and connect the ground lead to the vehicle chassis or the negative terminal of the battery. Proceed to test each of the wires in the connector, out of which one should read 12 volts. The one that does is the high beam power and is not grounded while the others are.

Turn off your ignition and the headlights. If there are three or four wires instead of just two, you should proceed to the next step.

Before you go any further, switch your headlights to low beam and then check the other wires using a multimeter. Again, one of them should read 12 volts, which is the low beam power and is not grounded. If the remaining two are then, turn off the headlights and ignition after this.

Section Two

Step 1

The multimeter should be set to measure resistance in Ohms. Put one lead on the vehicle chassis or the negative terminal of the battery, while the other lead should be connected to the ground. Should the resistance read zero, the wire is alright. Otherwise, proceed to the next step.

Step 2

Check the resistance of the wire and if it has some continuity or high resistance, look out for corrosion or loosen all connections before either replacing it or fixing any bad connectivity.

How do you check a headlight wiring connector?

To check a headlight wiring connector, you need to use either a multimeter or a voltmeter to ascertain whether the wires are carrying current or not. Where they are not, wiggle them to know where the disconnection is located or inspect both its ends to see whether it has been removed from where it is connected. You may also closely look at its entire length in order to find any signs of melting, swelling or broken seals.

How do you fix a bad headlight wiring connector?

In order to fix a bad headlight wiring connector, you need a socket wrench, wire connectors, electrical tapes and splicers. It involves first, opening the fixture and tightening all the wires before you test the light. If it fails to work as it should, the following steps will guide you on how to fix it:

Step 1

Using your socket wrench, remove the negative terminal of the battery.

Step 2

Ensure that the removed terminal is some distance away from the battery so that no current will go through it.

Step 3

Remove the socket from the headlight and take out its bulb.

Step 4

With the aid of your splicer, cut the wires about three inches from the light fixture.

Step 5

Take about a quarter-inch of wire coating and pull it out.

Step 6

Now, using the splicer, splice the old wires to the new connector.

Step 7

Thereafter, twist or braid the wires together according to their colours, while especially those with blue and red stripes in particular.

Step 8

With the use of some electrical tapes, cover the wires up.

Step 9

Reinstall the bulb and all the fixtures.

Step 10

Finally, put back the negative terminal and check whether the light works as it should.

Easiest Pontiac Sunfire headlight wiring fix

To start the process,  first remove the negative terminal of the battery, the headlights and turn signals as well as the radiator cover too.  These problems with Pontiac Sunfire headlights happen when the wiring runs in front of the radiator and thus rub against it,  thereby causing complaints with the headlights eventually. After locking the pinholes, replace that section of the wiring which is bad and wrap them with good electrical tapes.

Who can successfully fix headlight wiring?

Headlight wiring can be easily fixed by an experienced auto electrician in a workshop near you, or even by yourself, after diligently going through the do-it-yourself (DIY) procedures or manuals provided.

Places that repair/fix headlight wiring near me

All auto repair shops are good at fixing headlights connection issues. However, some of these experts are found at very popular and widely spread workshop such as Meneike,  Auto Surgeons Limited, Annapolis Auto Center and Auto Spa Limited. Others are Car max Autocare centre, NDSTAR AUTO and Chrismo Auto Care.



Should you carefully follow the steps involved in all these procedures, they are exceptionally easy to execute with excellent results. However, where there are complications, you are advised to reach out to any recognized auto workshop near you and let them do the technical things involved.

1 thought on “How Much Does It Cost To Fix Headlight Wiring?”

Leave a Comment