Normal
It CAN be done with up fitter switches and the Rigid or Sho-me flasher type unit but there are better options. If you use this type of flasher and want constant on in addition to flashing it will consume 3 switches. Switch 1 will be constant on, switch 2 will be strobe and switch 3 will be strobe mode. You can wire it by using simple T split and diodes that prevent switch competition OR a DPDT relay (which will energize the flasher with ignition shortening flasher life) or 5 pin relay but you would have to find input side of the up fitter switch. None of those options are"clean".What is a cleaner install is using a device like Wicked Warnings' universal park flash unit- this will still consume 3 switches but it's a dual relay set up that won't burn out your flasher over time and I think that unit has 25+ flashing modes. It is what some of our volunteer county EMS vehicles use. Another option is the Atomic LED flasher but the wiring is more complex.the Rigid and Sho-me flashers really aren't designed with constant on and up fitter switches in mind.EDIT: I received several PM's on this- YES, you can use two SPDT switches wired together instead of a DPDT relay- infact this may be cheaper/easier to find 2 waterproof SPDT switches than a single DPDT. If none of this makes sense let someone else do it or use a commercial solution like the Wicked warnings module (I have no affiliation with Wicked warnings, just know it works.)
It CAN be done with up fitter switches and the Rigid or Sho-me flasher type unit but there are better options. If you use this type of flasher and want constant on in addition to flashing it will consume 3 switches. Switch 1 will be constant on, switch 2 will be strobe and switch 3 will be strobe mode. You can wire it by using simple T split and diodes that prevent switch competition OR a DPDT relay (which will energize the flasher with ignition shortening flasher life) or 5 pin relay but you would have to find input side of the up fitter switch. None of those options are"clean".
What is a cleaner install is using a device like Wicked Warnings' universal park flash unit- this will still consume 3 switches but it's a dual relay set up that won't burn out your flasher over time and I think that unit has 25+ flashing modes. It is what some of our volunteer county EMS vehicles use. Another option is the Atomic LED flasher but the wiring is more complex.
the Rigid and Sho-me flashers really aren't designed with constant on and up fitter switches in mind.
EDIT: I received several PM's on this- YES, you can use two SPDT switches wired together instead of a DPDT relay- infact this may be cheaper/easier to find 2 waterproof SPDT switches than a single DPDT. If none of this makes sense let someone else do it or use a commercial solution like the Wicked warnings module (I have no affiliation with Wicked warnings, just know it works.)