I have an 07 sportster 1200 custom with a short or loose connection somewhere powering the fuel pump(efi). While sitting on the bike i reach under the tank and figit around and it will turn on so im trying to find a short. I removed the seat and played with the ecm but the connection is here and there just in time for the season damnit! Is this a common problem, what am i missing? At worst would anybody have a wiring diagram to see what wires are powering the fuel pump, start to end, so i can start checking resistance? Please help, im itching to get out!!
Thanks a lot
-Dave

 

Considering all the information you've provided I'd say something is wrong.
Generic advice: Check all connectors, make sure they are not corroded. Check if wires are actually connected to the connectors, loose wires are not that unusual.

 

Trailer for hire I had a dam fuse break one time on dif angles it would run & some times it wouldn't .drove me nuts & $$ later COULDN'T TELL BY LOOKING AT .GOOD LUCK .

 

07 Sportys are known for having corrosion problems in the fuse block that cause a number of different weird symptoms. Remove all fuses, clean the fuse block contacts and fuse contacts, then coat with dielectric grease and reinstall.

 

On my '06 I had an intermittent open ground under the tank, on the main harness there is 3 grounds going into one splice and going to case ground, only one of these 3 was intermittent. I assume the '07 harness will be similar, but same as you I could reach under the rear of the tank and pull and push on the harness and my problem would come and go.

2 dealers and 30 days in the shop, they couldn't fix it I finally took a day off work and fixed it!