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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

1980 F-150 tachometer issues

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Old Feb 19, 2006 | 03:36 PM
  #1  
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davidsca
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1980 F-150 tachometer issues

Hey all,
noob is back with another question. I did a search and gave up after about 25 pages. My 1980 F-150 4 X 4, 302, c-6 has the factory tach, but I've only seen it work once.(going down the I-state, I noticed it working). It hasn't worked since.
I can't find anything in my haynes book diagram, other than a reference to "tach only". It doesn't show any wires going to a tachometer.
Can y'all give me any help on checking the wiring to and from? It'd be nice to have a working tach.

Thanks,

DS
 
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Old Feb 19, 2006 | 06:11 PM
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One of the terminals on the coil should say something like "tach". Run a wire from there to the dash terminal that connects with the tach..
 
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Old Feb 19, 2006 | 07:16 PM
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In 1980, a DG-Y dot wire runs from the coil to the tach and a BK/LG dot wire runs from the tach through the Duraspark module to the distributor ground.
 
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