Tach Question
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Tuned
Joined: Sep 2010
Posts: 374
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Tach Question
Hi all - 
Can any one tell me if it would be possible to operate a tach off of the crankshaft positioning sensor on a 5.9 Cummins? I have a tach for a 5.9 but don't have the controller (computer) The engine came out of a 92 Dodge P/U.
Thank you in advance for any input, advise or ideas.
Can any one tell me if it would be possible to operate a tach off of the crankshaft positioning sensor on a 5.9 Cummins? I have a tach for a 5.9 but don't have the controller (computer) The engine came out of a 92 Dodge P/U. Thank you in advance for any input, advise or ideas.
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Joined: Jul 2002
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From: Long Island USA
I would think it would NOT just work by wiring it together. The signal from the crank sensor is pretty small compared to what a tach wants, but then again, I know nothing about diesel tachs 
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Tuned
Joined: Sep 2010
Posts: 374
Likes: 3
Thank you for the reply. From what I can gather from Dodge manual the power to the crank sensor is reduced to 8 volts then sent from sensor to the controler then to the tach so I don't think the voltage to the tach would be very high but I am definitely not an electronics or computer expert. I am going to study diagram some more. Hopefully some one will come along that is. The tach I have may be an after market, it was mounted on the dash of a p/u at the wrecking yard but the engine was gone so I couldn't trace the wiring. It way have been one that run of the alternator. I think I only paid $10.00 for it so if I burned it up I wouldn't be out much and i don't need the sensor for anything else ether so might just experiment.
