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What’s this connector plug for?

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Old Apr 26, 2026 | 01:53 PM
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Default What’s this connector plug for?

I’m installing Kahuna heated grips on my ‘19 FXLR and I bought the “required” plug-n-play accessory wiring harness kit. While installing it I noticed this unused gray connector under the left side cover. Is my bike pre-wired for some accessory, or did the first owner have something installed at some point? I have the manuals but didn’t see it in there.

BTW the $40 non returnable accessory wiring harness kit doesn’t have a two prong Deutsch connector to plug the grips into. It has a square 4 prong connector, a standard 3 prong inline accessory connector and 3 bare wires for splicing in. So much for plug-n-play.


 
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Old Apr 27, 2026 | 04:27 AM
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According to the 2019 Softail Main Harness diagram this could be the Data Link Connector if it is wired like this:




 
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Old Apr 27, 2026 | 06:24 AM
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Check out the first post in this thread on accessory harness install with a link to heated grip install as well.

Did you buy the right harness 69201750 for your year and model?
 

Last edited by FXD2003Rider; Apr 27, 2026 at 07:06 AM.
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Old Yesterday | 10:37 PM
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Yeah, I picked up that harness today. Local dealer sold me the wrong harness (599A), I had to return it and drive 45 miles to a different dealer to get that one.

On a different note, I noticed a splice in the clutch side power wire (not the crossover wire) about 2/3rds of the way down. Looks like there are 3 wires in that bundle, but then a red and a red/yellow wire are soldered together and covered with heat shrink. Is that normal. I bought these Kahuna grips from a neighbor who took them off her new trike because her hands were too small for them.


 
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