Hey is there anything different about our turn signal relays or are they just the standard three prong relays? The previous owner put on LED turn signals and they flash at hyper speed! I just took a chance and ordered a different undertail off of ebay because the previous own had installed one where the brake lights were hardly brighter than the running lights.
The OEM turn signal relay is a thermal type relay that depends on the higher current of the incandescent bulbs to work properly.
LED indicators don't supply enough current through the relay, so it's contact open time is much shorter than normal.
That's why you get the very fast blink.
The aftermarket electronic signal relay doesn't rely on current throughput, so I work fine with any bub type.