Ford in dash tachometer.

I have one. I need to know which connection in the back of the tach goes to what.
I have "C", "8", "G" and "B".

 

You have a model # or what it's out of?

 

It is a full size 80s Ford Bronco tachometer.
Part number EOTF-17360-Y on the back and EOTF-17B316-A on the front.

 

Maybe? Looks like 1 is for coil.
http://www.ford-trucks.com/forums/628424-tach-wiring-2.html#post5276880

 

"C" is to this ignition coil, "8" is the secondary ground for an 8 cyl engine, "G" is the primary ground, and "B" is the 12V power supply -connects to a "hot in run" 12v source.

 

you ask a question then tell the person answering he's wrong, you trying to be like a teenager or something??

 

That's how I read it.

 

I think he's just verifying...

 

Erm...Blugene was correct. One was for the coil, I agreed and confirmed his reply with information I found on the Interwebz. A collaborative effort if you will.

However, the tach doesn't work when wired this way. Irritating.

 

Dam. And you did go to the "+" side of the coil? Also, when I wired mt tach (wayback), I had to find a GOOD ground.

 

So I ran
"C" directly to the negative on the coil.
"8" to a bolt on the radiator support.
"G" to a bolt on the radiator support.
"B" to the positive on my battery.

Turn on the engine------nothing. I have been shocked a dozen or more times so I KNOW the coil wire is good. The grounds seem solid and the 12v is good soooooo.....? Bad tach?

 

I could be wrong but I thought the "+" side was what you needed. Otherwise it looks like you did it right. Might want to use a switched battery source if it comes to life.

 

I just want my $50 shipped to work. It appears to be unused. I wonder if I have killed it by wiring it in wrong. It worked for a minute and after I put the whole dash back together it stopped working. Made me mad because Ford clusters are a pain to reach behind.

 

So it WAS working...? Check for loose connections.

 

Goes to neg...