2005 Road King Classic Accessory connector
Stage IV
Joined: Oct 2013
Posts: 4
Likes: 1
From: Panama City, Fl
And to avoid further frustration. The plug has 4 wires
on with ignition
On with acc switch
On with brake switch
Ground
Depending on how you want the accessory to be powered is how you choose to wire the male side of the plug. I had added brake lights to my 99 FLHT that were plugged into ACC plug and they came on with brakes. Then I put HD's splitter on the plug and had my heated grips plugged in so they were on with ACC switch while the brake lights came on with brakes. On my '08 I plugged a 12v power port into it which is on with ignition, regardless of position of ACC switch.
on with ignition
On with acc switch
On with brake switch
Ground
Depending on how you want the accessory to be powered is how you choose to wire the male side of the plug. I had added brake lights to my 99 FLHT that were plugged into ACC plug and they came on with brakes. Then I put HD's splitter on the plug and had my heated grips plugged in so they were on with ACC switch while the brake lights came on with brakes. On my '08 I plugged a 12v power port into it which is on with ignition, regardless of position of ACC switch.
Last edited by djg9100; Jul 23, 2017 at 08:29 PM. Reason: add bike type
Outstanding HDF Member
Joined: May 2015
Posts: 2,172
Likes: 377
From: Georgia
I want to power my after market sound system [2005 Road King] using the Deutsch 4 pin connectors under the seat, and control it with the accessory switch on the nancell. The power lead for the amp has 2 wires, black and red with pin connectors [different from the Dueutsch pins]. How do you know which way to wire it, trial and error?. [is there a pattern to the female connector as to which hole does what. I have identified which one has the power. I also have the HD pigtail.
You can also do a search, I know I've seen it on here before.
Failing that,
Do you have a volt meter or test light?
If there's a black wire it will be ground. Then just test the other 3 unti you find the one that turns on/off with the switch.
Trial and error is likely going to lead to blown fuses or worse.
Outstanding HDF Member
Joined: May 2015
Posts: 2,172
Likes: 377
From: Georgia
True, the amp should be straight from the battery but that switch can be used to trigger a relay to turn it on.
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