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    How Do I Hook A Tachometer Up In A 1991 Olds Calais?

    I was told a tach can be put in my car but I am having troubles figureing it out. It has a 2.5 with coil packs, control module and automatic transmission. I am new to Blurt so if i did this wrong don't be bashful let me know

    asked 1 year ago

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    The purple wire on the ignition module is the tach signal. You can just tie into it. Then run your power wire to the fuse box ground the ground and tie the illumination wire into the dash light circuit(5 amp fuse in the fuse box) so it will dim with the dash lights,

    answered 1 year ago   

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