old tachometer wiring help
- Thread starter LUCK R
- Start date
There is a wiring diagram on ebay for $ 1.25 http://www.ebay.com/itm/SUN-Super-Tach-II-Tachometer-INSTALLATION-INSTRUCTIONS-/330832726309?_trksid=p2047675.m1850&_trkparms=aid%3D222001%26algo%3DSIC.CURRENT%26ao%3D1%26asc%3D11%26meid%3D3653167844063626761%26pid%3D100011%26prg%3D1005%26rk%3D3%26sd%3D130772977846%26 I don't know if you have a super tach II or not. Regards, Brian
joe plumber
Well-known member
Black is ground ,red is power .Not sure about the other two.
Mike in AZ
Well-known member
maybe this will help??....if blue is for the light, guess the white goes to the distributor??....Mike
http://www.modthebox.com/review129_2.shtml
http://www.modthebox.com/review129_2.shtml
Does the blue wire look like it could be a shade of green according to the wiring diagram Mike posted; Black would be ground, Red would be power, white would be the light and (Blue Green) would be to Coil + (if its a negative ground vehicle) it looks like the bulb is removable what wire goes to the base of the bulb? Regards, Brian
Merc Cruzer
Well-known member
LUCK R:
Take this for what it is worth...I have a 6 volt POS ground system in my 53' Merc...I installed (temporally) a no name tach to check shift points and speed at different rpm's...it does have a switch for 4,6 & 8 cyl...voltage didn’t matter.
4 wire tach:
Black = hot (-) when swich is on
Red = ground (-)
Green = (+) side of coil
White = head light switch
2 wire tach:
No switch for no. of cyl's - 8 cyl tach from an old Jeep
one lead to (-) side of coil
other lead to (+) batt (w/ switch - I did hook it up hot to the battery the first time and found that when you turn off the ign switch the motor jsut kept running)
Take this for what it is worth...I have a 6 volt POS ground system in my 53' Merc...I installed (temporally) a no name tach to check shift points and speed at different rpm's...it does have a switch for 4,6 & 8 cyl...voltage didn’t matter.
4 wire tach:
Black = hot (-) when swich is on
Red = ground (-)
Green = (+) side of coil
White = head light switch
2 wire tach:
No switch for no. of cyl's - 8 cyl tach from an old Jeep
one lead to (-) side of coil
other lead to (+) batt (w/ switch - I did hook it up hot to the battery the first time and found that when you turn off the ign switch the motor jsut kept running)