Same thing here. I rode to work Thursday (2nd shift) - 46 and drizzle on the way in and 36 and drizzle at midnight. I have the jacket liner, glove liners, and socks, but I didn't have the socks installed that night. That combination at full draw should only be pulling 8.25 amps, and I only had the control at about 1/4 turn. My headlight pulsed all the way home, regardless of having it on hi or lo beam and with the lightbar on or off. I even turned my idle up to about 1500 rpm, but it made no difference.
My first thought was my battery - it's over 2 years old. So I ordered a new one from Brent. If that doesn't cure the problem, I'll contact Gerbing, and ask my dealer's mechanic.
But this heated clothing is great otherwise...
