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Remove the spark plug wire from the distributor and spark plug by grasping the boot at the end of the wire, twisting slightly and pulling to disconnect it.

Inspect the connectors on the wire within the spark plug and distributor boots. The connectors should be free of corrosion and moisture with no apparent distortion or discoloration.

Set a multimeter to check for resistance or ohms in the x100 range. Resistance is indicated by the Greek omega symbol. Turn the selector knob or scroll down through the options until the proper range is set.

Insert one of the meter probes in the distributor boot and the other probe in the spark plug boot on the wire. Make certain you have good contact between the probes and the connectors. Read the meter display. The display should read between 1,500 and 2,500 ohms of resistance per foot of wire. A reading more than 6,000 ohms per foot indicates a bad wire. NGKs low-resistance wires may have significantly less resistance, such as its Power Cable wires rated at 270 ohms per foot.

Grasp the plug wire by the boot and reconnect it to the distributor. Install a known good spark plug in the spark plug boot of the wire. Hold the threaded part of the spark plug against the engine block or a grounded area of the frame. Have a helper start the engine; inspect the spark produced by the plug. The spark should be blue with a strong audible report, or popping, as it fires. An orange spark with a weak report may indicate bad wire connectors.

Turn off the engine and remove the test plug. Grasp the plug wire by the boot and reconnect it to the spark plug installed in the engine. Firmly press the wire onto the plug and make certain it snaps into place.

Replace the plug wire if it fails the test in Steps 2, 4 or 5.

Open the hood of your Camry and locate the negative battery terminal. Loosen the clamp bolt on the negative battery cable end with a wrench and remove it from the battery terminal. Isolate the battery cable from the battery for safety while you work.

Locate the spark plug wires on the spark plugs. The plugs are on the front of the engine about halfway down the cylinder head.

Grasp the spark plug wire boot on the spark plug end of the wire and pull it straight off the plug while twisting it side to side to help loosen it from the plug. Follow the wire along its length and locate the boot at the ignition coil.

Grasp the boot on the coil end of the spark plug wire and pull it out of the coil. If you are installing new wires, now is the time to replace this one. Move to the next wire and repeat the process, continuing one wire at a time until you replace or remove all four wires.

Cut the cord attached to the lighter plug about 2 inches below the plug, using diagonal pliers. Remove about 2 inches of outer covering from the tip of the patch cord, using diagonal pliers. Strip off 1/2 inch of insulation from the tip of the two inner wires (positive and negative), using a wire stripper.

Look at the plug. Observe the two retractable metal fins protruding on each side of its cylinder, and the retractable metal nipple at its tip. Note that the side fins are negative conductors, and that the tip is the positive conductor of the 12-volt circuit.

Hold the plug cap in your right hand, hold the cylindrical body in your left hand, and twist the cap counterclockwise to unscrew the cap from the plugs cylindrical body. Find the holding screw along the adapter plugs cylindrical body, and unscrew it with a screwdriver. A lighter plug is typically split lengthwise along its center into two identical halves. Open the cylindrical body to reveal the metal fins and nipple inside, including a small spring that pushes the retractable metal nipple.

Note the order in which the metal conductors and spring are arranged inside the plugs cylindrical body. Remove the existing wires attached to the metal nipple, and to the metal fins, by cutting the wires using diagonal pliers.

Loop the stripped end of the positive wire (red, or black with white stripe) around the base of the metal nipple (positive terminal), and solder the copper wire to the metal nipple, using a soldering gun and solder wire.

Wrap the stripped end of the negative wire (black, without stripe) around the base of the metal fins. Fasten the wire onto the fins, using soldering gun and solder wire. Replace the metal nipple and metal fins inside the plug, and reassemble the plug in the same arrangement as you had found them earlier. Make sure that the positive and negative wires do not come in contact with each other.

Turn on your vehicles ignition switch. Insert the car lighter adapter plug into a 12-volt receptacle on your vehicles dashboard, and turn on your appliance to test the connection.