wiring and stuff

sorry for the non creative title but ok My brother came over and checked the gun and said either the battery or the soldering job. and it is not the battery so i would ave to solder it but i'm asking should i solder or wait and get new wiring? i have a soldering iron and soem sodler. and new wiring would cost 15 bucks taken from my saving for gear and mags. i feel like i could bt it doesn't help alot so what do you guys think i should do? also i'm not getting the ris since my brother said it wouldn't fit.

What doesn't your gun do right? I kind of lost why you are having to repair the gun in the first sentence, please clean it up.

Try checking the fuse by swapping it, or by not having the fuse in the circuit at all (plug the battery directly into the trigger harness.

well it doesn't shoot but here is a discusion http://www.airsoftallies.com/ask-a-pro-f24/m4-problems-t2932.htm incase you didn't read it or something i forgot the stuff so ya

Does it not work at all now?

makes noise its gonna be awhile till i can fix it since i have to move again but its possible

its probably a gear issue. Have you re-shimmed it, because it could be over shimmed.

i have no clue first time doing it i needed my bro but i'm gonna try re-soldering it then see about that stuff