I decided to change out the battery on my '05 Deluxe -- no issues with the original yet, but I'm planning on an extended road trip this spring and a 5-yr old battery is just another preventable problem.

I bought a replacement from the local HD dealer yesterday and decided to do the swap this afternoon. No problems getting the old battery disconnected -- negative side first, then positive -- and removed. I set the new battery in place, connected the positive cable and then started screwing in the bolt on the negative terminal. I thought I heard a low clicking sound, stopped immediately and verified the ignition switch was OFF. I resumed tightening the negative connection and again was sure I heard a clicking sound for just a few seconds, then it stopped. I finished the installation, then turned the ignition switch on -- lights on as expected. Turned kill switch on, engine logo on speedo appeared as usual, faded as usual, and bike cranked/started right up. I shut the bike down, then rechecked everything before reinstalling seat. I cranked the bike again and went for ride, everything normal.

Maybe I was hearing something that wasn't there? If not, what could have generated that clicking sound?

 

Might have been the fuel pump?

 

But the ignition switch was verified as off...

 

All this electronic **** they got in em nowadays who knows? I'm thinkin maybe a relay for the security system or something like that. I've heard it as well when reconnecting the battery on my 05. I wouldn't worry about it.

 

That would be my guess.

 

That is the relay. It's all good.

 

Relay. Nothing to worry about.

 

I hear that same sound on my 2004 Fatboy every time I disconnect or reconnect the ground cable on the battery. It's exactly the same sound I hear when I twist the dash **** to the ignition position. I've been told that it's normal and not a problem.

 

OK, at least I wasn't just hearing things...

Thanks for the info!

 

initialization of the ecm causing the relays to click. like a sys check