Raxiom Sequential Tail Light Problem for Mustang?

sounds like the problem is internal to the switch you put in with the kit, to be honest your probably better off giving american muscle a call and asking them and or just having a replacement shipped out to you

hmmm strange... you may have a bad wire in the system then.. or possibly a crossed wire its hard to say without taking it apart and checking

If you're on the second set and its been right side both times I'm thinking its a wiring or maybe even a bulb issue.....for the heck of it I would try changing all the bulbs on the right side....you may have a bulb that is going but still lights and creates a short.....worth a try....if you had no issues with the stovk lihhts you shouldn't have an issue with the sequencers....I'm not familiar with raxiom set, got mine from mustangtaillightsequencers.com. they were splice ins had no issues.

Here's what I went through with the Raxiom Sequential Taillight plug-in Kit in my 2004 GT.
Bought the kit, installed the kit, seemed like they flashed too quickly.
Bought the V2 LED flasher to slow them down and the flasher worked for a day and then buzzed instead of flashing.
Obtained a replacement from american muscle (these guys are great and really stand behind the parts).
While waiting found an old thread that stated when you have led bulbs in the front turn signal sockets the led flashers get wonky. Install a couple of resisters on the front and all is good again. So I did and both flashers worked, no more buzz.
Drove around for a month and found one of the reverse led bulbs quit working... sent the (left side) back to american muscle without issue.
Installed the spare I picked up on eBay (since I heard about the problems and seems a number of people now have an extra due to warranty replacement)
No issues since... so I suspect the resistors (yes only on the front turn signals) are the real solution to keep them working as intended, especially if you've installed led bulbs throughout the car.