Hey there! I need some help, chimhey and lever before the boss"" or what u wanna call it, whats the right signs to lighten? :) bad english, know but hope you will help
In The IronWorks, talk to Baxter.
Defeat O'Leary Nappers. Get key to open the first door.
Talk to Baxter again. The second door is locked. Baxter tells you to get the combination from Nails O'Leary.
Defeat Nails O'Leary. Get the "combination" from Nails after you defeat him. Nails tells you to "look up" before you leave his room. The "combination" you need is above his door. It is three symbols, but I don't remember what they are.
Go back to the chimneys and light only the three symbols that you saw in the "combination" from Nails.
Pull the Lever. The door opens. Continue on your quest to find Baxter again. Be sure to watch for "more symbols" for combinations later too.
This links will show you the "dialogue" details for the quest to defeat Nails: