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Old 02-21-2014, 10:28 AM   #5
motornut
78K & 79C Jimmys
 
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Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
Re: 79 Blazer factory tach PROBLEM ?

Quote:
Originally Posted by FASTDYNA View Post
just bought truck goes to zero when you turn on key then when you start it pegs out all other gauges work fine
can you see if it's got the right harness on the back?
does it go threw the firewall?
should be pink power,brown coil,black ground....
other browns are lights......
may have been added?,
is the cluster case sealed behind it?
how high does it count?
stock ign?
plug on the dist cap?
mine looked like this
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1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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