Tachometer
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Joined: Sep 2016
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From: S.W. FLORIDA
Tachometer
I have a 2005 FXD carbureted that I want to install a Drag Specialties tach on. I know the wiring from the tack and what the wires are supposed to wire into. My question is where can I pick up the trigger wire for the coil and what color is it. The ground, power and light are no problems I just dont know what color the coil trigger wire is and is there a factory wiring plug by the frame neck or will I have to go directly to the coil. Thanks.
Cruiser
Joined: Feb 2010
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I have a service manual for my 2005 FXDWG that also has a wiring diagram for your FXD. There is no negative terminal at the coil, only a 12+ and front and rear plug wires. Both tach and speedo signal wire is the LG/V coming from the ECM, it's the second pin from the right on your speedometer plug. The wiring diagram shows a tachometer and plug, maybe yours has the plug capped off next to your speedometer, if not just tap into the LG/V on the speedometer. Hope this helps!
Seasoned HDF Member
Joined: Sep 2017
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From: England
Wiring diagram here - 99949-05_en - 2005 Wiring Diagrams | Harley-Davidson SIP (harley-davidson.com)
A quick search brings up all kinds of wiring diagrams for Drag Specialties. Didn't the tacho come with instructions?
A quick search brings up all kinds of wiring diagrams for Drag Specialties. Didn't the tacho come with instructions?
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From: Honah Lee
On my 04, it was the harness plugged into the speedometer. Interesting enough, I got the tac used off ebay. Did not come with the pin.
The dealership told me the pin only came in a service kit. The service wanted an hour labor to install it!? Ha Ha. It's the same pin in a 9 pin connector from old computer printer cables.
All that go around. Harley saved 5 cents by not putting the pin in the cable harness.
The dealership told me the pin only came in a service kit. The service wanted an hour labor to install it!? Ha Ha. It's the same pin in a 9 pin connector from old computer printer cables.
All that go around. Harley saved 5 cents by not putting the pin in the cable harness.
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Joined: Sep 2016
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From: S.W. FLORIDA
The tach wiring was not the problem. I was looking for what wires at the main harness at the frame neck to use. I located all but the "trigger" wire to the tach. All is good though I ended up going to the plug at the coil and tapping the G/w wire there.
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