I wouldn't trust my life to some $40 ebay airbag reset scam.
They probably just disable the system so the light never comes on, but that also means the airbags don't work.
If you truck has been in an accident, and you don't know who repaired it and what they replaced, you need to inspect both airbags, and both sensors. And the front seatbelts too. The center airbag unit has a decel sensor in it that has to be replaced after activation. I've never heard of a reset procedure, and unless it came from Toyota, I wouldn't trust it.
Don't put a new control unit in without testing the front sensors, if they are both tripped, there is a chance the bags will go off as soon as you plug that thing in. I've seen it happen, but don't remember the exact circumstances.
Your problem sounds more electrical, make sure the control unit has the correct power sources and grounds, and the bulb wiring isn't shorted.