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ive brought a new tacho and its not auto meter but the old one is when i cut the old one and put gree2green black2black red2red on the new one i noticed the white wire in the dash and so does the auto meter gauge have white wire does any1 know where this white wire should go (all the wires on the new 1 are hooked up it has red, green,black,2 4 the shift light also do i turn the headlights on or just accessories (the auto meter i had hook up by an auto elec) done same gauges on diffrent cars but they all had white

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why do i have 2 put it on the bonnet when the autometer tacho was mounted inside and i was trying to use those wires and cant see why i cant ---- as 4 the lights inside the tacho they are working when red,black, green are hooked up even with the white not conected the lights work but the rpm is not reading which wire reads the rpm - on the tacho

(THE NEW TACHO DOSENT HAVE WHITE )the wires comming out of the dash were for auto meter - (white) red green black - BUT THE NEW 1 DOSENT please if u dont know why the white wire is on the old tacho and not the new thankx but no thankxps the lights work 4 the tacho ---- when do i turn acess on - think ill spend the $50 - thought sum guys in here could help ---hhhhhhhhh

with your headlights off try using a test light on the white wire from the dash see if your test light comes on if it dosent then turn your lights on and see if your test light comes on if it does then you know what that wire is for now with the green wire (tacho signal wire) with your car running hold your test light on the green wire coming from your dash if its getting a signal your tacho in your dash should drop to 0 revs hope this helps you

if the white wire has power when you turn your lights on just tape it up as your new tacho must light up when eva your car is on when i installed my tacho i didnt disconnect the battery or have the ignition on all i did was wire it up with my test light it was all good goodluck

NEW PROB the white wire is for the dash and boost gauge and if i connect it to red i have boost and dash lights (hmmm even with the headlights off -wtf) if i just tape it up i have no dash and boost lights as 4 the tacho u can turn it of at the tacho -so i think it must run all the time 4 sum reason i think i cant have this tacho

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