Painless Wiring – How To Choose The Right Line For Adjustment

Are you looking to install wiring in your car?
When you open the car dashboard, you will encounter rainbow-like colours. Wires of different colours run through the entire length of your car and are responsible for carrying power and signal to different elements.
It may be a bit confusing at first, but with attention and effort, you can rewire your car yourself. Today we will dive deep into Painless Performance wiring harnesses and accessories so that you can carry out the wiring yourself without breaking a sweat.
We will start by discovering the different Painless wiring types.

CHAPTER 1: Painless Wiring Types

 You can find different types of Painless wiring suited for specific conditions. It may be difficult to understand which wire you need to use if you don’t have an idea about them. We will discuss the different types of automotive wiring so that you can make an informed decision.

Most car wiring systems use either cross-linked insulation or PVC for protecting the core. When they can withstand the temperature, the two vary greatly. Cross-linked wires can be used in high-temperature conditions compared to PVC.

There are different types of painless wiring such as-


It is the primary and the most common wiring that you can buy from auto stores. As you can understand by the name, it is suited for the general purpose. It comes with the multi-stranded core, and you can easily squeeze it through tight spaces thanks to plastic insulation.

GPT wire is used for general circuit wiring and fully comply with SAE J-1128 specifications. You can use it between temperatures of -40 degrees C to 80 degrees C.

The wire is resistant to liquids, acids, chemicals, and oil.

Motor Wire

Also known as Hook-Up wire, this type of painless wiring is equipped with more beautiful strands of wire. The configuration of the wire makes it ideal to carry higher voltages required by your car. The wiring is sometimes used in HVAC installations and has found application in the automobile industry.

Generally, motor wires are rated 600 volts and can withstand temperatures up to 105 degrees C.

Now we will take a look at the three most common type of cross-linked wires. They can efficiently operate within temperatures of -51 degrees C to 125 degrees C. The wires can be used in and around the engine without any worry as they can withstand high temperatures.

You can also use them in cold and icy conditions and be sure that your car’s electrical system is working fine!


It is the most common wire in the cross-linked category. It is compatible with standard automobile wire connectors so that you don’t find it challenging to set them up.

They are also very suitable for engine compartments that meet the heat resistance requirements of SAE J-1128. GXL wires have thin insulation which enables them to fit hard to reach areas in cars and trailers.


Cross-linked SXL wires are more resistant to temperature, friction, and aging compared to other types of wires. The wire is used in high-stress situations involving racing cars or industrial and commercial vehicles.

SXLs wire has a standard wall thickness which adds a level of durability according to SAE J-1128.


TXL painless wiring is the most lightweight among the different categories. It is also thinly walled which makes it suitable for use in narrow and constricted areas. It can also withstand temperatures of up to 125 degree C and can suit engine compartments and other heat generating spaces.

Battery Cable

The battery cable is used to hook up the car’s electrical system with the battery and ground. You typically find it near the starter and can make out the larger gauge and heavy build.

Battery cables have to be checked regularly for corrosion which might not be visible from outside.

Speaker Wire

The speaker wire takes care of the audio application in your car. It is a paired stranded wire and carries sound signal from your car stereo to the speakers.

The wire is meant to carry low voltage so don’t use it for any other application than for connecting to the speakers. It would help if you also adopted care to match the positive and negative ends correctly while wiring them up.

Painless wiring mostly makes use of TXL wiring as the insulation enables it to be accommodated in less space. They are very flexible and can be easily passed through your vehicle.

We have covered the Painless wiring types, and you should be aware of their applications by now. Next, we will explore the different types of harnesses available.

CHAPTER 2: Painless Wiring Harness Types

 Wiring harnesses a bunch of electrical wires or cables which carry electrical power or signals. The cables and wires are secured together using sleeves, cable lacing, cable ties, straps, and other materials.

Wiring harnesses are used in lose wires because they provide several advantages. Some of automobile and trailer wires could cover kilometers when fully extended. By bunching them together, it is easier to fit them inside the vehicle. It leads to optimum utilization of space and also protects the wires from shorts.

By bunching the cables together, you can also increase resistance to abrasions, vibrations, and moisture. Wiring harnesses also simplify the installation process, and there is only one harness to take care of.

You can find the following type of harnesses from Painless wiring-

Painless Wiring Harness LS1

The LS1 is a small-block engine used by General Motors as the main V8 in their rear wheel drive cars and trucks. The vehicles came into the market during 1970 and shared many similarities with the earlier Chevrolet small block V8.

The LS engines use cast iron blocks for standard editions, while performance editions use aluminum with cast iron cylinder liners.

The LS variation has been featured in three generations – III, IV and V. Chevrolet Corvette used the LS1 variation starting from 1997.

Painless wiring produces LS1 harnesses for General Motors models starting from 1998 to 2004. The models include Corvette, Firebird, and Camaro.

This seat belt is suitable for the LS1 mechanical throttle body engine produced between 1998 and 2002. The vehicles use a T56 manual transmission or 4L60E/4L65E automatic transmission.

The harness will also be suitable for Throttle by Wire LS1 or LS6 engines which have been converted to the mechanical throttle body. You can also use them for 1999 to 2006 Vortec truck engines which have been converted to an LS1 intake manifold.

The package includes an 8 circuit modular fuse box with color-coded wires and labels for correct installation. The length of the harness is enough to mount the fuse box and ECM in the glove box or under the dashboard.

Painless Wiring Harness C10

The Chevrolet C/K series of trucks were introduced around the 1960s and became one of the most popular selling vehicles. The current models of pickup trucks drew their inspiration from the C/K series, but sadly they are not manufactured today.

The two-wheeled version of the truck was given the letter C while four-wheel-drive versions cam with the tag K. The trucks came in three versions- one ton, three-fourth tons and half a ton and known as C30, C20 and C10 respectively.

So the C10 was the two-wheel drive version half ton truck. The truck had a 115-inch wheelbase with 6.5-foot bed and 127-inch wheelbase with an 8-foot bed.

Painless wiring offers C10 harness for the Chevrolet trucks that sold between the 1960s and 2000. The 28 circuit wiring harness can be used universally for C10, C20, and C30. The wiring comes with original styled bulkhead connector and has multiple factory connectors already installed so that it is easy for you to set it up.

You can find ignition switch, headlight switch, and connectors, wiper motor, dimmer switch, blower motor and switch in the package. The wires are color coded and printed with custom identification for proper installation.

Painless Wiring Harness Jeep CJ7

Jeep CJ7 is one of the models among the series of small and off-road vehicles introduced by Jeep. The range of vehicles was sold between 1945 to 1986 and were commercial versions inspired by Willys Overland.

The vehicles came with separate body and frame with leaf spring suspension. They have a sharp nose, and most of them were four-wheel drive versions. Sold more than 1.5 million units, and you can find a wiring harness for Jeep CJ7 from painless wiring.

The 22 circuit CJ7 harness can also be used for later models of CJ Jeeps and feature an OEM fuse box. You can use custom route the wires as they are left open-ended. The harness uses a bulkhead connector, but you can also customize it according to the specifications of your model.

The harness comes ready to install with GM column mounted ignition switch connectors and turned signals using the same design. The wires are as usual color-coded and custom printed with labels for easy identification.

Now we will take a look at the painless wiring systems for your automobile.

CHAPTER 3: Painless Wiring Systems

 Painless wiring systems connect the different electrical elements of the car and are color coded. They are available in harnesses meaning several wires are held together by a plastic sleeve or rubber strap and run side by side.

The wiring will also come with different circuits and fuse blocks which are needed for the functioning of your electrical system. You can also find different configurations to suit the needs of different make and model.

Painless wiring offers universal harness systems and customizable ones for street rods, hot rods and other classic and muscle cars.

In the next chapter, we will tell you to use diagrams for wiring your car.

CHAPTER 4: Painless Wiring Diagram


Painless Wiring Schematic

It should not make you sweat while you are wiring up your car. Painless Performance provides a user manual for all of their products which tell you how to install the specific type of wiring.

You can also take help of Painless wiring schematic and diagrams which show you the connection of different components of your vehicle. The diagrams are presented on the Painless Performance website and placed under different categories for convenience.

You can find schematics related to.

● Engine section

● Headlight and dimmer switches

● Alternators and charging

● Starting and ignition

● Ignition switches

● Trail Rocker

● Turn signal or hazard switches

● Toggle switches

● Pro-series

● Switch panel dimensions of Trail Rocker and Track Rocker

The schematics open in new window in PDF files so you can easily download them and keep them for reference while you install the wiring in your car.

In the next chapter, we will start by discussing some of the essential parts of a car wiring that you can get from Painless Performance. We will begin our discussion with the wiring fuse block.

CHAPTER 5: Painless Wiring Fuse Block

 Painless wiring systems come with fuse blocks whose job is to protect the wiring. The fuse blocks protect the wires connected to it and are ideally located in your wiring system. For example, if an electrical component draws too much power, it can blow a fuse to keep your wires safe.

Most of the wires come with two fuse blocks- one located in the engine compartment and another found near the dashboard.

The fuse in the engine compartment contains fuses for different devices such as an engine control unit, brake pumps and cooling fans. The fuse panel in the dashboard contains the fuses for switches and components in the passenger compartment.

Painless wiring fuses use a particular type of wire which is housed in a self-contained connector. The heat generated in the wire is based on the current flowing through it and its resistance. The fuses found in automobiles come with two blade connectors and a conductor placed inside a plastic housing.

You may also find some fusible links in the whole wiring of your car.

Solder or similar metals are used to create the conductor inside the fuse. The conductor has a lower melting point than the wire which makes the fuse functional. The size of the conductor is of great importance as it will melt due to the heat generated by the excessive passing of current breaking the circuit.

Check the amperage of your fuse before replacing it. Your fuses should be for your car’s electrical system to work correctly.

We will now discuss the switch panel in the painless wiring harness.

We will now discuss the switch panel in the painless wiring harness.

CHAPTER 6: Painless Wiring Switch Panel

 The switch panel of your car contains all the buttons and switches you need to control different aspects of your car. You have to use the switch panel for different functions such as turning on auxiliary batteries, turbo or just powering on the fans.

Switch panels can be also be found for flasher for a right turn and left turn and the headlights. Some of the cars even have their ignition switch located on the switch panel, and this holds for performance vehicles.

The switch panel is also essential to racing cars, and you have a special type for the purpose. You can find six switch panels to 8 switch panels from Painless Wiring along with wires to connect to the switches. You can use color codes to install wires and read the tags to see what they do.

We have covered the basics of Painless Wiring in details and discussed all important aspects. Now let us briefly take a look at Painless wiring kits.

CHAPTER 7: Painless Wiring Kits

 Painless wiring is available in different configurations, but you can use the chassis harness. It is the most common type and highly customizable for your vehicle.

The circuit kit is available in two versions- one with a GM column mounted ignition switch and one without it. You will find the Painless mounting bracket and GM engineered fuse block to protect your wiring.

It also comes with pre-configured wires for dimmer and headlight switch, turns signal connectors, horn relays and 12 fuses including Maxi fuse. The GM steering column turn switch, 10SI, and 12SI alternator and steering column turn switch is also included in the kit.

The different circuits included are brake lights, heat, and A/C, electric choke, backup lights, fan relay activation power, charging, cigarette lighter, emergency flashers, horn, park lights, ignition coil, radio, clock, tail lights, brake lights, wipers, dome light and fused power source.

You will also find wires for the fuel gauge, temperature gauge, and oil gauge.


 Painless Performance offers high-quality universal and custom wiring options for your car. By using this guide, you will be able to pick the right harness and fit it using the schematics provided. The wires are also color-coded and labeled for circuit identification, and you can even take help from the manuals.

You can get in touch with its use to get your Painless Performance products at the right price. We can also help you with choosing the right harness through our friendly consultation.

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