You may want to run your AEG's without fuses... But given how many un-fused guns I have seen catch fire in the field Versus how many fused guns I have seen catch fire on the field, I think I will keep my fuse. Thank you 
Anyway, it sounds to me like your wiring is caught somewhere and is shorting out the gun, you will need to inspect your wiring to make sure it's not broken or pinched anywhere. For an immediate fix to a broken cable you can wrap the break in electrical tape until you can replace it.
Don't forget to check that the contacts on your motor are correctly attached liek everybody else has suggested too!
Anyway, it sounds to me like your wiring is caught somewhere and is shorting out the gun, you will need to inspect your wiring to make sure it's not broken or pinched anywhere. For an immediate fix to a broken cable you can wrap the break in electrical tape until you can replace it.
Don't forget to check that the contacts on your motor are correctly attached liek everybody else has suggested too!
