I have a 1990 xlt lariat 4x4
i want to hook up a three wire tach white,black and red.
Anyone know how ?
Manythanks!

 

lol yes...you cant read directions...?

red wire....Positive...hot with Key ON...
black wire...Ground

White wire...trigger wire...hooks to the Negative side of the Coil...(this is the skinny wire)

 

I have a big daddy don garlits dixco flag tach.
I want to put on a 1990 xlt.
There is only 3 wires not the traditional 4
try to remember how to hook it up.

 

dude, bowtie just told you where they go

 

Stand Alone? Maybe find someplace comfortably for it to sit!

 

the 4th wire is for the light....if it dont have 4 wires it aint got a light...everything else is all you buddy...

its so simple even a caveman could do it....

 

red key
black ground
green\other trigger probably neg on coil

 

god you dr bowtie!!!

 

ha ha ha ha ha ha ....hit to close to home did it...

 

tach has 3 wires,red black and white.
when red is hot and black is grounded,light comes on.so it has a light,duh
the truck has a coil pack.not a old school coil.
does these new style ignitions and efi junk have somewhere in the dash a place to put the wire for the coil side.