hello there all of a sudden im hearing what sounds like an electrical short under my tank? its my 2007 sportster its parked, ignition off and i hear this kind of buzzing coming from under the gas tank, top of engine area , ill hear it for a few seconds then it would stop , then a few seconds later there it is again ??? its dark now i looked around best i could , but didnt see anything obvious, any ideas what this might be ????

 

Does it sound like a buzz or whine? It maybe your fuel pump.

 

First of all unplug the main BUS fuse, then one at a time remove, clean corrosion, and reinstall with di-electric grease all fuses and relays in the fuse box, most likley you have gotten water in the fuse box and something has corroded and is shorting.

 

HOTLAP is right. Look for white powder on the contacts (corrosion). Coat all contacts with Dielectric Grease. If you still have a problem switch the location of the two relays and see if that solves the problem.

 

+100. The sound is your fuel pump cycling on/off & is most likely from corrosion build up in your fuse block. It's been noted on here numerous times & I believe there was a TSB for the dealer to replace the fuse block on certain bikes.

 

hello there thanks very much everyone, i checked the fuses , they were all corroded , so i cleaned them up with an emery board coated them in dielectric grease and all seem ok now . i couldnt get into the fuse block as well as i would have liked , but i think it'll work for now , good thing too i got called back too work and i need my wheels too get there.

many thanks too all who replied , you really helped me . ride safe my friends