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Craig Robelen 05-05-2013 09:59 AM

Ford Lehman 120 Tachometer Connection
 
My tachometer has stopped working when the engine is running although it responds when I turn the ignition key. I had a flood in the bilge and need to locate where the tach is connected to the engine to investigate if that connection is corroded. I have yet to locate where that connection may be. Any suggestions?

CapnChuck 05-05-2013 01:41 PM

Re: Ford Lehman 120 Tachometer Connection
 
The tach takes off the alternator on the FL120. Your post doesn't make sense. How can it respond when you turn the key if the engine is not running? Chuck

chuck53 05-05-2013 04:52 PM

Re: Ford Lehman 120 Tachometer Connection
 
You are in the wrong forum to ask this question.
Go to the Gear and maintenance forum, diesel engine sub forum and ask.

Craig Robelen 05-05-2013 06:50 PM

Re: Ford Lehman 120 Tachometer Connection
 
Quote:

Originally Posted by CapnChuck (Post 1025845)
The tach takes off the alternator on the FL120. Your post doesn't make sense. How can it respond when you turn the key if the engine is not running? Chuck

What I was saying is that when I turn the ignition key the Tach jumps but once the engine is running not does not register the RPMs

Craig

Craig Robelen 05-05-2013 06:54 PM

Re: Ford Lehman 120 Tachometer Connection
 
What I was saying is that the tach jumps when I turn the ignition key but dyes as the engine begins runnning. Any suggestions?

chuck53 05-05-2013 08:01 PM

Re: Ford Lehman 120 Tachometer Connection
 
Quote:

Originally Posted by Craig Robelen (Post 1025919)
What I was saying is that the tach jumps when I turn the ignition key but dyes as the engine begins runnning. Any suggestions?

Again, you are in the wrong forum.

You need to be in gear and maintenance...sub forum, diesel engines.

desert rat 05-05-2013 08:20 PM

Re: Ford Lehman 120 Tachometer Connection
 
dead diode converting the ac from the pickup to dc for the meter.


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