The switch is provided with a wiring schematic that is for the proper installation and use with a 12volt negative ground system. When utilizing this switch with a 6-volt positive ground system the power to the flasher will connect to the negative battery terminal or your hot terminal block of your original wiring harness. A 6-volt flasher unit must be used, and the indictor bulb in the switch replaced with a 6-volt bulb if you plan to use the internal indicator.
If wiring this switch to our 22-circuit or 12-circuit wiring harnesses or similar style harness you have several options:
- Use the harness supplied two prong flasher and left/right turn indicators in your dash/gauge cluster
- Use the harness supplied two prong flasher and a pair of 1/4-watt diodes between the left and right indicator wires connected to the switch's yellow wire (silver band on diode to yellow wire)
- Use a three-prong flasher and connect the switch's yellow wire to the "P" terminal of the flasher to use the indicator integrated into the switch
This turn signal switch is designed to work with standard incandescent bulbs but will work with modern LED bulbs if dummy load resistors are used inline with the LED turn signal bulbs. Dummy load resistors should be installed in the front light circuits to prevent excessive heating during times that the brake may be applied for extended time (such as stopped at a stop light). An alternative method is to use a two-prong LED flasher unit with ground wire; however this is only an option when a modern wiring harness in the car is used.
The turn signal switch is grounded through the mounting clamp, so your steering column MUST have a solid ground connection. If your column is painted or secured in a rubber isolated mount we recommend running a dedicated ground wire under the mounting clamp to a solid chassis ground. This will often solve problems of the integral indicator not illuminating as well.
The orange wire is optional for brake light pass through (where your brake and turn use the same filament in an 1157 bulb for example). If your turn and brake lights are separate lamps this wire does not have to be connected to the output side of your brake light switch.
Traditionally, hazards work with the key off or on, while turn signals only work with the key on. When wiring your switch's flasher, be it a free-standing three-prong or the two-prong turn/hazard option in a modern wiring harness, understand that if you wire to a hot at all times circuit both hazard and turn signals will work with the key off. Alternatively, if you wire to an ignition switched circuit your hazards and turn signals will only work with the key on.