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I just installed a homemade plug adapter that plugs into the accessory plug under my seat and thought I would share the experience. I have a 2007 Road King Classic and I wanted to hook up heated gloves, and after searching the forum for quite some time, I found some info, but had to basically work through it myself. I purchased a pair of Gerbing heated gloves as well as the dual thermostat to control them. I then went to Harley and bought the “Supplement 12 Volt Power Point” (PN 91843-97), which is basically a cigarette lighter with a plug on the other end. The plug, which is a rectangular shaped plug with four receptacles, is what I was looking for. This is a “Deutsch” plug (I’ve seen them called that and it has the name on the orange colored face) and it connects to the plug under the seat in front of the battery. Although the plug has four connectors, only two are active and the other two are simply not there. After removing the seat and locating the plug (mine was directly in front of the battery and its lead was strapped down and easy to locate) I first checked that it was not getting power when the ignition switch was off. I then turned the ignition switch on and sure enough, I had 12 volts at the two pins inside the plug. I noted which was positive and which was negative. The first problem I ran into was the plug from the Harley Power Point was backwards from the plug under the seat! If I plugged it in the way it was, the two pins in the plug under the seat would not match up to the two metal receptacles in the Power Point plug. However, after fiddling with the Power Point plug, I found that by prying upward with a small screwdriver on the orange face, it came out. Beneath it are small tabs near each metal receptacle that when bent towards the middle of the plug, release the receptacles and their wire from underneath the plug. At the bottom of the plug is a rubber seal that goes over the two wires that needs to be carefully pulled down to release the wires. There are also two white pins that go through the other two holes in the seals just to fill the holes. Those can be removed also and put back in later. This worked out well, because my plan was to cut the plug off the Power Point and use it on the Gerbings wiring harness instead of connecting it directly to the battery. After cutting the wires on each, I slid some shrink tubing onto the wires (purchased from Radio Shack) and then soldered the wires from the Power Point plug onto the plug for the Gerbings heated gloves connector. When you do this, make sure you solder the positives together and the negatives together. Next, make sure when you reassemble the plug, you place the positive receptacle in the right place to match the location of the positive pin in the plug on the bike and the same for the negative. After plugging in the newly made adapter, I used wire ties to secure the lead towards the front left side of my seat and it is almost invisible. When I get on the bike I can easily connect the plug from the thermostat for the heated gloves to the plug adapter and it works great. I also saw that Harley sells a splitter plug that would allow you to connect two things to the same plug under the seat but be careful of the total amperage. You may also want to check that the pins and receptacles in the plugs match up! I’m very surprised that neither Harley nor Gerbings sells an adapter for this plug to go with their heated gear. Anyway, I hope this helps anyone out there that may be looking to connect something to the accessory plug under the seat on their touring bike. I’m sure that there are a lot of things that could be connected to it.
Glad your project worked out for you and thanks for the write-up. I find it much easier to read posts like this if it includes paragraphs seperated by double-spacing.
Also, the HD Service Manual Appendix contains excellent descriptions of the various connectors HD uses, including the Deutsch connectors, and how to assemble and dissassemble them.
It's interesting that the Accessory connector on your '07 had only two wires (ground and switched power) since my '04 SM shows four wires--the two additional being power for run and brake lights and is used, for example, if wiring saddlebag spoiler LEDs.
Why didn't you simply connect the Gerbing power connector to the battery? I have one connected for using the Twin Scan II+, battery tender, etc. Very convenient IMO.
Okay, sorry I didn't make everyone happy and I didn't take pictures because until I was done, it didn't seem that important!
And THANKS to everyone who seemed like the info was helpful at all. I appreciate the responses and will next be getting a service manual to see what is in it.
I did use the pigtail that came with the gloves, but I cut it off and soldered it to the Harley plug so that it was wired to the ignition switch. If I connected it directly to the battery it would always be hot and I didn't really want that.
I just got my first Harley about 3 weeks ago and this was my first post on this forum. I was a jet mechanic in the Navy and a professional mechanic working on Porsches and Mercedes while going to college to be a mechanical engineer. Needless to say my bike will not be stock much longer and I'll be sure to use the forum to get advice and hopefully I can also give somealong the way.
It's not the destination that's important but the journey...
I did the same thing to sgchick's bike. (her bf here). On the fairing bikes the 4 pin is a switched hoton the accessory fairing switch - a ground, runninglight and brake.I addedHD's Y addapter for an extra 4 pin plug, made my own 4 pin lead and wired as did renorush. I hooked the other plug into the lighted saddle bag latch lights. The adventage of using the 4 pin is it can be switched off at the fairing instead of fooling around on your jacket to turn off the heated gear. There is also not an always hot lead coming from under the seat. Dissadvantage is you should not plug in too mutch heated gear as the wire guage is smaller and longer and will not handle the load. Also, for those of you on the East coast, you can hook a battery tender on the Gerbing lead wired to the battery with some modification. There is also the B+ connecter under there to avoid extra connecters on the battery, but you have to find a ground, it is always hot, and it runs through the maxi fuse. (don't want to loose that) Good job renorush in your detailed explanation!
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