I've been looking into this as well. The short answer is...it depends.
viewtopic.php?t=19085viewtopic.php?f=2&t=18358 I like the order
1 - "Intensify"
2 - "Activate"
3 - Top switch
4 - Bottom switch
5 - red push button
So I'll use that.
The only button that I think we can definitively say did what is 1, it fired the lights in the tip.
5 seems to not have been used for anything in the movie so we can use it for whatever we want...but within the lore of the movie I would say it is most likely the "Capture Stream".
In most scenes where the wand is used 3 seems to be already flipped up so it is suspected that that button turned on the pack lights, Cyclotron and Power Cell. I think I will be wiring the "Pack boot up" to that button so that I don't have to stick one on the pack itself.
Now, this is where we get tricky.
It seems in the Roof top Battle that the Bargraph and White Hatlight are already running and then 4 is used to activate the Grill and the movie plays the charging sound.
The same can be said for the Hallway Slimer scene, Ray flips 4 and the Grill lights up and the charging sound plays, however in this case there doesn't seem to be any other lights on this Pack's Thrower.
I do not believe the Clear Acro light is blinking in either of those scenes and I can not see the SlowBlo.
I can't see 2 in either of those but 3 is flipped in the Rooftop scene so the Bargraph and front Hatlight must be controlled on that pack either by 2 or 3.
Now, I, along with everyone else naturaly thinks 2 activates the Thrower and at least the grill light so there must be scenes where it does that, though off the top of my head I can't think of a specific scene in GB1.
Then we have the Courtroom scene and in this scene 2 definitely activates all the lights in the Thrower.
Now, you can take the Mattel Wand into this if you want as well.
In the Mattel Wand we have 4 activating the "Pack" and Slowblo, 3 activates the BarGraph, Acro Light on steady and White Hatlight then 2 tuns on the Grill, plays the charging sound and starts the Acro to blink.
Going by what we see in the movie they have it backwards as 4 almost certainly turns on the Pack and for some may turn on some of the Thrower lights, unless they were tied into 2.
So if you want to go with Mattels setup but rearranged to line up with the movie...it would be.
1 - Fires
2 - Activates Grill, sets Acro to blink and plays the Charging sound.
3 - Activates the Pack Lights, Slowblo and plays the Pack Startup.
4- Turns on the Bargraph, White Hatlight and steady Acro.
Then for movie we can go a few ways.
1 - Fires, always and only. Easy
2 - Activate the grill, play the Charging sound and optionally set the Acro to blink. Or Activate All lights and Charging Sound.
3 - Activate Pack lights and play Pack Startup Sound. Optionally turn on Slowblow, Hatlight and/or Bargraph.
4 - Do nothing, switch functions with 2. If Switching with 2 then 2 can turn on the Slowblow, Hatlight and/or Bargraph.
Personally, I like this setup.
1 - Fires
2 - Activate All Thrower lights and Plays Charging Sound, power down whine. Minus the Slowblo, maybe.
3 - Activate Pack lights and play Pack Startup Sound, Shutdown. Optionally turn on Slowblow, maybe.
4 - Play the Music
5 - Alternate Capture Stream Lights and Sound or Manual Venting.
Oh, wait, both!
5 - Manual Venting.
1+5 - Alternate Capture Stream