It worked fine until I replaced the headlight bulb and the wires pulled out of the flimsy connector. I think it is wired right now but doesn't work so it is probably fried. I have done away with that flimsy connector and have it connected with some female pin connectors I bought at Radio Shack. It has a good tight connection now. I've tried the programming by turning the switch on and off 3 times within 2 seconds as described on instructions I got online. I was just hoping there was some way to check the thing with a meter to see if it is really fried or not.
Some modulators are "programmable" by turning the high beam (I think) on/off a specified number of times.
I'm sure someone about a year ago said his wasn't working (modulating). After someone telling him to program it, it worked fine.
Without reading the whole thread again, what isn't working? You've hooked it up, correctly, but the head light isn't modulating?