Cars with the turn signals that are yellow in the rear need the converter. If you just have red brake lights and the turn lights are the same bulbs no converter is needed. Green is left turn ( and brake) yellow is right turn( and brake) Red ( towards the car) is the stop light brown is the running lights ( parking lights, markers) black is a ground wire ( not all converters use it). If you don't what to use the converter you have to pick which lights your gong to do with out. turn singles ( and hazard flashers) or brake lights. With the converter you can have both.
Your vehicle CANNOT be wired for a trailer without using the converter box. The only vehicles that do not require a converter box are the vehicles that use the stop lamp bulb as a turn signal. Your vehicle is equipped with SEPARATE stop lamp and turn signal bulbs.
To make the converter box work correctly, it must be wired according to the instructions to BOTH the stop lamps AND the turn lamps. The tail (or PARK) lamps DO NOT go through the converter box.
Your trailer uses the SAME bulb for stop and turn - THIS is the reason you need a converter.
The wire color for both your LEFT TURN and your RIGHT TURN are LIGHT GREEN/TAN. Although the wire colors are the same at the bulb sockets, these are SEPARATE circuits and must be wired to the correct wire at the converter box. (LEFT and RIGHT) The converter box will have an INPUT connection for EACH of these.
The wire color for your STOP lamps is WHITE/TAN. The converter box should only have one INPUT wire that connects to this. It doesn't matter which side of the vehicle you connect this wire to. All of the stop lamps are on the same circuit.
The converter will then have only one wire for LEFT turn and stop (usually YELLOW) this is the wire that needs to go to your trailer connector for left turn and stop.
The RIGHT turn and stop will most likely be GREEN coming out of the converter.
Where are you trying to connect the converter box? I did not misidentify the wire colors. The wire colors to the FRONT turn lamps are solid green and solid tan. I gave you the wire colors at the REAR of the vehicle, which is where converter boxes ar normally installed. I have never seen a converter box that requires you to connect the tail (Park) lamps to the box. If the box that you purchaced reqires you in the installation instructions to do so, then this is specific to the manufacturer of that particular converter box. The purpose of the converter box is to join your turn signals into the same circuit as your brake lamps and shouldn't have anything to do with your tail or park lamps. Sorry I didn't know that your instructions for the coverter box tells you to hook your park lamps into the box. Again, I have installed HUNDREDS of converter boxes in my 35 year career and have never seen one like that.
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I am familiar with the connection instructions, and have repeatedly tested all of the car wires. The response from the first expert was basically to address the connection instructions (partially correct), and to misidentify the car wire colors. Both of the converters that I have tried require the tail lights to be connected to the box. He said not to. My tail light wire is black and yellow. The brake light wire is white and tan. The right turn wire is solid brown, and the left turn wire is solid light green. These are not the colors listed in the first reply. I understand that the yellow wire combines both the left turn and the brake light. All functions work on the right tail light. The tail light works on the left tail light. The left turn signal, the left brake light, and the tag light do not work. The yellow wire from the conv box lights up the tester probe, indicating output, when it is not connected to the trailer harness. When it is connected, the yellow wire shows no output from the box. I have tried two trailer wire harnesses, both are new. I have tried two converter boxes and two tail lights, all are new. I have tried grounding the box and the trailer from the car battery. I jumped a wire around the box directly to a new tail light and the turn signal works, but the yellow wire from the converter box (left turn signal and brake light) will not output a signal when connected to either of the two trailer wire harnesses. I have probes and test meters. Any ideas on how to isolate the problem?
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