danclemts

iTrader: (1)

I have a 3rd gen (LB9) drivetrain in a Volvo 740 sedan, runs and drives nice, still little things. I have a 4 cylinder tach so it reads high. took cluster apart and disassembled a 1986 Gm v8 tach, I'm gonna be able to mount the GM tach to my Volvo faceplate and needle etc. Just need to know which terminals are which on the tach, they are not labeled. there are 3 connectors, 2 come off tach itself, 3rd is off circuit board. Any body know how to tell which is pos, ground and signal?

vetteoz

iTrader: (13)

black is ground , white is tacho signal from coil

danclemts

iTrader: (1)

yeah, I found that diagram, problem I'm having is which connector on tach corresponds to plus, ground etc. , no labeling on circuit board, just 3 metal tabs, If someone has the gauge cluster, maybe could tell me which color wire goes to which connector. With tach face down, there is a tab, then a space then two tabs close together, first and second tabs have connectors to tach, 3rd just connects to circuit board.

danclemts

iTrader: (1)

Pictures are worth a 100 words, First pic shows GM tach connections, second shows Volvo, you can see where they were nice enough to label theirs.

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