Quote:
Originally Posted by 78-5.3
oh ok !! so i need to find out where the socket wire go to tacho speedo extra i will try to track down a schmatics for the 91 cluster !!!
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You can just trace the circuits on the back of the cluster to see which terminal does what if you can't find a diagram.
Unfortunately you don't have the connector pigtail to get the wire colors off of so you know how to repin your dash harness to match. Hopefully the connector isn't different. You will need at least one extra wire possibly more to put into the connector so it can feed the speedo the signal from the ECM.
I know mine have several unused positions on the plug so there is room to grow.
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