Hi Bob,
Regarding your Big Hauler's headlamp... if you'll go about halfway down the page on the George Schreyer link referenced earlier, you'll see the innards of the headlamp; now would be a great time to replace that with a bright LED!
Regarding the battery for the chuff (sound), check out page 12 of the owner's manual, furnished on this link:
http://www.bachmanntrains.com/home-usa/dwg/dwgs/Big_Hauler_Instructions.pdf
Good luck!
Jay
Regarding your Big Hauler's headlamp... if you'll go about halfway down the page on the George Schreyer link referenced earlier, you'll see the innards of the headlamp; now would be a great time to replace that with a bright LED!
Regarding the battery for the chuff (sound), check out page 12 of the owner's manual, furnished on this link:
http://www.bachmanntrains.com/home-usa/dwg/dwgs/Big_Hauler_Instructions.pdf
Good luck!
Jay