Just picked up a 13 Road King Classic. Everything is great except the heated grips don't work. The bike only had 266 miles on when I bought it and the guy said he once ran down the battery leaving them on. I have looked at my service manual and can't determine if there is a dedicated fused circuit for these.

Appears in the diagrams that power comes through the turn signal systems but not being a dang electrical engineer is hard to tell

Anyone know if this could be a dedicated fuse, or are these pretty unreliable?

 

Heated grips were not stock on that bike (or at least were not on my 2015 RK). When I installed heated grips there was actually a fuse for the power. I located my fuse under the seat. Made since and was pretty easy to get and close to my power connection. I would look under the right side cover with all the other electrical or under the seat.

Ran my grips for almost 2 years and they were working great when I traded it in a few weeks ago. If you search the board you will find guys that have reliability issues with them. However normally a guy like me with no issues is not going to post "my grips work great". So reliability might be an issue.

 

Although some of the CVO bikes had a separate fuse in the fuse block under the left side cover,
normally the fuse (if they followed the HD instructions) should be under the seat as said.
.

 

Found it under the seat. Not unlike a charger set up with a 4A mini blade fuse that is blown. Will start there.

 

Sounds like a do it yourself (wrong) installation run directly off the battery instead of switched by a wire that is hot only when ignition switch is on or in ACCY position. If you want it right, rewire the hot feed. Then you'll never run the battery down by leaving the grips in an "on" setting.

 

 

Yep. The PO said he wasted a battery once before from leaving them on. Will have to find a switched power source to hook it to

 

Just a 4 amp fuse could have blown when the switch was left on, as voltage goes down amperage goes up, its the law, (ohms law) 4 amps x 12 volts is only 48 watts, I’m guessing those heaters are more wattage than that. Probably needs a bigger fuse.

 

This is not the case with resistive loads, which include heater bands.