Broken Tach.

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Mar 11, 2007 | 07:24 PM

B-Bob

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Broken Tach.

The tachometer on my '87 6.9L isn't working. Is it hard to fix? Where should I look first for the problem? Thanks

Mar 11, 2007 | 09:31 PM

Dave Sponaugle

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From: Nutter Fort, WV

B-Bob,
Welcome to FTE and the IDI diesel forum.

My first guess would be the tach sending unit.
Here is a picture with it and the wire connection labled.

Mar 12, 2007 | 08:18 PM

B-Bob

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Thanks. Are they expensive to replace?

Mar 14, 2007 | 08:36 PM

Dave Sponaugle

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From: Nutter Fort, WV

About 50 dollars at Ford.

Mar 18, 2007 | 03:42 PM

dwkremer

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When my tack stopped I replaced the sending unit, no help. I then started trying to trace the wire (pulling and moving the wiring harness) and I got a flutter out of the tack. With a little more pulling it started to work fine. I'm sure ists some contact, probably ground but it hasen't missed beat in over 50,000 miles so I'm not searching for it.

Mar 18, 2007 | 04:37 PM

B-Bob

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ok, thanks I'll check that out too.

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