A friend's bike is a late model Fat Boy (2004, I think), carburetor (not FI). His Engine Light comes on. He took it to the shop, and there were no codes, and they couldn't explain it, even though it was on. Rather than pay them a lot of money to T/S it further, he asked me for help.

Does anyone know what inputs there are for the engine light on a carbureted Fat Boy? I'd like to go snooping around his engine and see if i can see any reason for the warning light to come on. But, I'm not sure where to start.

 

I just saw your older post and was wondering if you ever found out what that problem was with the check engine light coming on? My 04 fatboy is doing the same thing

 

The OP last visited here in 2015