How to Connect the Hazard Light Switch for a Motorcycle?

2 Answers
VonEverly
09/03/25 6:52am
This is a universal three-wire hazard light switch, with the middle wire connected to the flasher output line. The left and right wires are connected to the left and right turn signals respectively, and there is no need to distinguish between left and right turn signals when connecting these two wires—either can be connected to either side. Below are the uses of the hazard light switch: 1. Driving in foggy conditions: Due to poor visibility in foggy weather, you should not only turn on the hazard lights but also the fog lights to alert passing vehicles and provide illumination for yourself. 2. In case of malfunction or traffic accident: When a malfunction or traffic accident occurs on the road, the hazard lights should be turned on to alert passing vehicles for safety. On highways, if a vehicle malfunctions or is involved in an accident and stops, failure to use lights and set up warning signs as required will result in a 12-point penalty. 3. When towing a faulty motor vehicle: Both the towing vehicle and the towed vehicle should turn on the hazard warning flashers to indicate that the vehicle is in an abnormal state.
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ClaytonDella
09/15/25 8:13am
I've personally tinkered with adding a hazard light switch to my motorcycle. First, you need to purchase a hazard light switch, which is available at motorcycle parts stores or online. Open the turn signal handle housing, and you'll find two wires controlling the left and right turn signals. Connect these two wires to the two contacts on the hazard light switch. If the switch has a third wire, it needs to be connected to the ACC power line of the ignition lock. Remember to disconnect the negative terminal of the battery before working! I used a multimeter to accurately identify the wires before proceeding. After connecting, secure the wire ends tightly with electrical tape. During testing after the modification, I noticed the flashing frequency had increased. The mechanic said that with the increased load, I'd need to replace it with a hazard light-specific relay. The entire modification took about two hours. Using hazard lights in rainy weather significantly improves safety, but electrical novices should consider seeking help.
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