Help! Rookie wrencher. Speedo sensor where is it?
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Joined: Oct 2006
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From: FT. LAUDERDALE, FLORIDA
Help! Rookie wrencher. Speedo sensor where is it?
My speedo is not working so I have read to check the speedo sensor. I read that is in on top of the tranny but where? Do I unscrew something and wipe it? What and where. Your feedback is greatly appreciated!!!!!!!!!!!
Tourer
Joined: Jul 2005
Posts: 422
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From: Brookville, Ohio
The speed sensor on my '05 Heritage Classic is located on the right side and to the rear of the top cover on the transmission. It is fastened to a plate that is held in place with an allen head bolt. The speed detector uses the 4th gear ring as a source of input. I'm not sure if it detects each gear cog or, as in most cases, a magnet imbedded in the gear. After looking at the wiring schematic, I see there are three wires going to the sensor. One is a ground, one is +5 Volts DC from the ICM (PIN 3) and one is the speed signal (PIN 10). I would be careful with this little gem since it uses +5 Volts. A 12 volt short circuit will most likely smoke it or worse yet, back feed into the ICM and smoke it. I haven't read any articles on how to test the thing, but now I'm curious.
Last edited by Mike05; Feb 27, 2009 at 09:45 PM. Reason: additional information
Road Master
Joined: Nov 2007
Posts: 790
Likes: 6
From: AZ
I had one fail. Cost was $65. Very easy R&R once you locate sensor. Good luck!!
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