Last week I installed a new Shaft extension and compensating sprocket nut. I rode my bike into the gargage before I changed out the parts but cannot get it started now. I didn't do anything electrical but for some reason I have lost the fuel pump priming cycle and the spark at the plug. I did turn the engine over with the plugs out of the holes to make sure nothing was binding after I did my Primary work. Could I have cooked a start relay, ECM, fuel pump sending unit, or coil in the process of turning the bike over with no ground to the plugs?

I will drive 2 hours to my nearest Harley Dealer tomorrow to purchase an Electrical Diagnostic Manual. I will probably buy a new Start Relay for $5.00 and maybe a new System Relay for kicks and giggles. Should I consider the pump or sending unit or coil? Does anyone know how to test these items?

Another note of interest is that when I remove the fuel pump fuse and test for power with my test light....I am recieving power to the fuse terminal during the pump priming cycle, BUT...when I plug the fuse back in I lose the power. I am leaning towards the Start relay or the Fuel pump sending unit.

 

Check your hheadlight high and low and your horn. they should work. now check your turn signals, they probably don't work. are you getting any error codes? ignition power loss will cause the above symtoms. check the ignition fuse. if blown you'll have to figure out why. mine was a pinched wire in the right hand switch housing.

 

Thanks for the reply. Checked fuses, all are ok. I have power to speedo when the run switch is turned on, also I have power to the PCIII, I can see the lights while the fuel pump is supposed to be running through it's priming cycle. Headlight works on both High and low beams, marker lights work, and horn works. What next?

 

I did find a pinched wire but after repairing with a good soldered connection, symptoms didnot change.

 

What is the sending unit you speak of?

What year and model Bike?



Al

 

It is the fuel pump sending unit. It is wired into the same bulkhead connector as the fuel pump and is located under the console. Now that you ask me that question Al, I have not checked to see if I have power there. I will make sure I check that before I head out to the Harley dealer in Portland.

 

hey let me know whatyou find out please i have a 2009 fatob ad i changed my grips & now my fuel pump wont come on & no spark, also checked my fuel pump fuse with ign. on had 0.05 volts all other fuses had around 11.50 volts. this is really bugging the hell out of me...! losing ride time ...

 

Same problem 09 ultra any luck

 

What did you find to be the problem? I have the same issue.
Ride safe,
Mike

 

take the power commander out of the equation. unplug it, plug your ECM back in and see what she does..