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05-31-2015, 08:41 PM
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#1 |
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Registered User
Join Date: Mar 2014
Location: Ionia, MI
Posts: 199
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1976 chevy 292 external coil hei tach wiring
I have a 76 c30 with a 292. It has a external coil and I have a tach I would like to hook up.
There are 3 wires currently connected. One is the main feed wire and two are going to the distributor leaving one left unused. Two going to distributor.  Top view of coil showing the main feed wire(right top) and two going to distributor (bottom two) and the one unused terminal(by my finger).  It makes sense that this one unused terminal is for a tach. But, I want to make 100% sure so I do not fry anything. Thanks for any help.
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1991 Metro commuter 1991 s10 future project truck 1987 V10 backup daily/junk truck 1985 K20 Winter beater 1991 R30(squarebody) c/c flatbed towrig 1994 s10 80"wb custom build |
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05-31-2015, 09:57 PM
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#2 |
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Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,366
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Re: 1976 chevy 292 external coil hei tach wiring
Yes, that unused terminal on the coil is for the tach.
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05-31-2015, 10:46 PM
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#3 |
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Registered User
Join Date: Jun 2011
Location: St Robert, Mo
Posts: 730
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Re: 1976 chevy 292 external coil hei tach wiring
Usually marked "Tach" on the cover... Unless its an aftermarket piece.
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05-31-2015, 11:36 PM
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#4 |
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Registered User
Join Date: Dec 2007
Location: Kimberley, BC, Canada
Posts: 799
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Re: 1976 chevy 292 external coil hei tach wiring
With the two wires going to the distributor, one is hot (when ignition on), the other is the switched wire that activates the coil. This second wire is where you want to connect the tach to.
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Greg 64 GMC Suburban - 283, NV3500, 14 bolt 77 C10 swb - 292, SM465, 12 bolt |
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