Tach Not Working May 31, 2018 By Mark DiPietro & filed under Harley Tips. 2002 H-D fxdx. I have a tacometer that spins backwards. Dealer is baffled. Via Email Tach is broken or, somehow, you are harnessing electricity from the other side of the equator. Related Fix My Hog Videos: Live Event – Dash Review Custom Gauges / Wiring Have more questions? Check out our Q&A index page to find some answers. Discussion Click here to cancel reply. Name (required) Mail (required) (will not be published) Website 11 Responses to “Tach Not Working” Dennis June 18th, 2018 Hi, I have a ’95 Ultra (FLHTCU) with a tach issue. As soon as I start the engine, the tach needle will bop up and down for a second and then hit the stop at max rpm – all this at idle. My electrics all seem to be good. I’m not quite sure what to look for next. Appreciate any suggestions you may have… Reply cas864 July 1st, 2018 Try a different ground. Reply Richard colyer July 14th, 2018 2008 Harley Electra Glide, Tachometer light stays on all the time, even when off, no key, parked Reply Joey Davis July 15th, 2018 2000 Road King EFI run for 10 mins or so then shuts down, checked spark nothing did this to eliminate fuel pump, I have changed Intake seals they were leaking and replaced fuel filter, it has a CAL 03 code? Reply johnwiley333 November 26th, 2018 Ticket 20510 i have a 2003 harley ultra classic, installed new coil and new tac, still dosent work,, why ? Reply johnwiley333 November 26th, 2018 checked fueses all good,, what do i do to get it working ? Reply Customer Service November 29th, 2018 Dear John, Thank you for your patience. In regards to your question- We suggest using a multimeter and test light to begin testing at the tach plug. Make sure that you have correct power and ground and that none of the related wiring is damaged. Check for continuity on both ends of the sensor wire. https://www.fixmyhog.com/video/simplifying-electricity-002170/ https://www.fixmyhog.com/video/resistance-conductors-002177/ https://www.fixmyhog.com/video/ohms-law-002178/ https://www.fixmyhog.com/video/harley-davidson-ignition-coil-test-008707/ Sincerely, Mark Fix My Hog Video Membership Reply CHRIS May 6th, 2019 2000 sporty, speedo works but tach rarely tries to work ? Does it have a separate ground somewhere or do I have to partially dismantle bike and find and check all connections ? Seems to be a sealed unit, could it be inside ? Reply Customer Service May 7th, 2019 Dear Chris, Thank you for your patience. In response to your question- The tach has 3 wires; power, ground, & trigger/sensor. Inspect and test the three. https://www.fixmyhog.com/video/simplifying-electricity-002170/ https://www.fixmyhog.com/product/overview-of-electrical-systems-part-1-download/ https://www.fixmyhog.com/video/welcome-to-fix-my-hog-electrical-002169/ https://www.fixmyhog.com/video/watts-law-002179/ Sincerely, Mark Fix My Hog Reply Woodrow Campbell July 31st, 2019 Changed 2001 twin cam to screaming eagle cam chain tensioner with adjustable pushrods. I now have oil gushing from my carberator Reply Customer Service August 1st, 2019 Woodrow, You need to get back into your cam compartment. There is either an issue with your oil pump or timing marks are not correctly aligned. https://www.fixmyhog.com/product/cam-chain-tensioner-shoe-upgrade-part-2-download/ https://www.fixmyhog.com/product/cam-chain-tensioner-shoe-upgrade-part-3-download/ Reply GET NEW LESSONS & SPECIAL OFFERS SIGN UP FOR THE NEWSLETTER Email* This iframe contains the logic required to handle Ajax powered Gravity Forms.