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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat
Tachometer Signal

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04-04-2020, 06:21 AM	#4
outsidetheboxster Registered User Join Date: Aug 2019 Location: Spokane, WA Posts: 61	tach connections I have a question about doing just the opposite. My engine swap is using a stand alone ECU that has a 5V tach driver output. As I'm not using the factory ECU to make the engine run, can I back feed the 5 volt signal into the same OBD wire to make the tach in the dash work? I'm aware of the Tach Adapt product but I still need to find out what wire or wires feed the tach itself. 01 Boxster S 6 speed. I have the Bentley manual and wiring diagram but my eyesight is just not that good anymore..... Thanks for any thoughts!

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