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02-08-2011, 08:18 PM
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#1 |
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Senior Member
 
Join Date: Apr 2008
Location: Berne IN
Posts: 3,240
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Tach question
Bought a gauge cluster with a Camaro tach- the guy said it worked when he pulled it. The metal plate on the back of the tach has a 12V terminal & a COIL terminal stamped on it. I hooked a 12V lead to the 12V terminal & ran a lead from my HEI TACH terminal to the COIL terminal- it doesn't work. Does it need to be grounded? Any ideas? Thanks for your help! Kirk
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02-08-2011, 08:29 PM
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#2 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Tach question
if it is bolted to the inst panel, and the panel installed in the dash, then it should be grounded. If all the lights work properly, then it is grounded.
Sounds like a bum tach if all the above is true |
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02-08-2011, 10:14 PM
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#3 |
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VA72C10
 
Join Date: Mar 2008
Location: Midlothian, VA
Posts: 25,269
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Re: Tach question
The camaro tach I had before had a ground terminal also. I believe there is a thread on here with the terminals marked.
__________________
Looking for a 67-72 swb or blazer project in or around VA. 
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02-08-2011, 11:11 PM
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#4 |
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"GO DAWGS"
Join Date: Oct 2003
Location: Batesburg, SC. 29006
Posts: 5,410
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Re: Tach question
If you tried to test the tach out of the cluster then 12 volt hookup, HEI and a good ground. I am with VA72 I think it has a ground terminal and if not you can use alligator clips to ground it to the backing plate will be fine. That is the way I test all of my loose tachs.
PT
__________________
70 CST SWB 70 NOVA 93 Indy 500 Pace Truck (SOLD) 94 SILVERADO SWB 5/7 drop 2000 Silverado swb 2005 Nissan Altima 3.5 (Surprisingly very fast) 2004 GMC Yukon XL Denali BATESBURG, SC. 29006 29006 Some of my restorations http://www.snapfish.com/snapfish/thu...NAME=snapfish/ Restored Tach tins 8 cyl - 6 cyl http://67-72chevytrucks.com/vboard/s...d.php?t=518185 Contact info(Not my paypal address) DAWGSFAN227@YAHOO.COM God Bless Our Troops |
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02-08-2011, 11:45 PM
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#5 |
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VA72C10
Join Date: Mar 2008
Location: Midlothian, VA
Posts: 25,269
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Re: Tach question
Here's the pic showing the ground I was thinking of
and Gringoloco's thread on it... http://67-72chevytrucks.com/vboard/s...d.php?t=251017
__________________
Looking for a 67-72 swb or blazer project in or around VA.
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02-13-2011, 09:58 AM
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#6 |
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Senior Member
Join Date: Apr 2008
Location: Berne IN
Posts: 3,240
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Re: Tach question
I tried the tach again but ran a ground to the ground post & it works great! Thanks VA72C10 for the info!
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02-13-2011, 10:14 AM
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#7 | |
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VA72C10
Join Date: Mar 2008
Location: Midlothian, VA
Posts: 25,269
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Re: Tach question
Quote:
__________________
Looking for a 67-72 swb or blazer project in or around VA.
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02-13-2011, 11:34 AM
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#8 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Tach question
sweet... glad I was wrong!
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