Mystery Plug
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Intermediate
Joined: Nov 2011
Posts: 38
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From: New york
Mystery Plug
2007 Knightrain .. Can any one tell me .. definitively .. what the GREY plug is for ... under the seat on the left hand side ... It's a 4 pin .. deustch type .. plug .. with only 3 pins in it. The wires are Grey, Black/green tracer, Green/ violet (?) tracer. I've been told it's an accessory plug .. and/or a diagnostic hook up .. etc.
Cruiser
Joined: Nov 2006
Posts: 164
Likes: 22
From: Perth
Mate, it's the diagnostic plug as already mentioned . Used by the dealer to read the ECM if ever required. Closes off with a waterproof "butt-plug".
It's also where you mount up your race tuner ( SERT, TTS , SEPST ) to change the ECM calibrations yourself if you choose to do that . I do lots of Harley tuning and re-mapping here in Australia using that Deutsch plug always
On all Softails it's where you describe under the seat. Other models have the same plug but mounted elsewhere. Under the left pannier on a dresser ( "bagger" ), under the left sidepanel on a Dyna , headstock on a V-Rod etc etc..
Now that's a definitive answer from Perth Western Australia ( Down under to you !)
It's also where you mount up your race tuner ( SERT, TTS , SEPST ) to change the ECM calibrations yourself if you choose to do that . I do lots of Harley tuning and re-mapping here in Australia using that Deutsch plug always
On all Softails it's where you describe under the seat. Other models have the same plug but mounted elsewhere. Under the left pannier on a dresser ( "bagger" ), under the left sidepanel on a Dyna , headstock on a V-Rod etc etc..
Now that's a definitive answer from Perth Western Australia ( Down under to you !)
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