After a few experiments in the vehicle, I discovered that a small 3 amp fuse soldered in place of the loop would return the blinking to normal. Please note that this mod will only return blinking to normal speed. It will NOT allow you to vary the blinking to any desired speed. To do that you'll need to start tracking the resistors and capacitors on the board to see which ones are the timing circuit for the relays. I didn't need to do that so I re-installed the module at this point. If I get a spare module from a junk yard, I might experiment some more just to see if it can be done easily or not.

UPDATE: I finally blew the 3 amp fuse recently so I went back into the unit a just installed a 6" piece of 18 Guage wire in place of the original wire loop. That restored the proper flash rate once again and took the fuse out of the loop.

Remember that the current for the bulbs is going through this wire so you can't make it too small or it won't carry the current without overheating. It is best to install the blinker without the case and experiment to be sure you have the flash rate correct and that the wire is not heating up. I tucked the extra wire inside the case and re-installed the unit into the car for good. It's been that way for about a month now with no problems.

I'm only running two bulbs on my turn signals now so your results may be different if you are running more or less current. If I install front LED turn signals I expect to have to adjust this again.