What am I doing wrong? Tach install!

V-Viper

New Member

Sep 17, 2003

39

0

0

Oct 6, 2004

#1

• Oct 6, 2004

• #1

I don't know what I'm doing wrong wit my Autometer Tach install.

The lights are working and I can set the shift point only when I turn the key all the way around without using the clutch. The it will not read out the RPM!
So I;m geussing I'm doing it to the wrong wire? Heres the pic:

It did it to the yellowish wire, plz tell me I'm wrong and which one to use. lol

Thanks!

 

T

The NJ Exile

New Member

Jul 28, 2004

81

0

0

Northern VA, Philly & Northern NJ

Oct 6, 2004

#2

• Oct 6, 2004

• #2

You hooked it up wrong....
Green Wire - to the Negtive on the coil
Black Wire - to Ground
Red Wire - 12+ Source
White Wire - To Dash board dimmer
Hope this helps.... John

 

V-Viper

New Member

Sep 17, 2003

39

0

0

Oct 6, 2004

#3

• Oct 6, 2004

• #3

The NJ Exile said:

You hooked it up wrong....
Green Wire - to the Negtive on the coil
Black Wire - to Ground
Red Wire - 12+ Source
White Wire - To Dash board dimmer
Hope this helps.... John

Click to expand...

Thx, I geuss I juss need to ID the "Negative on the coil", I cut the green wire and put that gray wire at the end of it, shouldn't make a difference right?

The light works so I'm geussing everything ok but the wire in the pic, is that the negative on the coil?
Thx.

 

T

The NJ Exile

New Member

Jul 28, 2004

81

0

0

Northern VA, Philly & Northern NJ

Oct 6, 2004

#4

• Oct 6, 2004

• #4

If the tach needle does not resond or goes the wrong way you have the worng one. when you extended the wire you have it soldered? I would suggest you do not do what you have in the PIC. Bare wires are asking for trouble. For that connection I would solder it. John

 

V-Viper

New Member

Sep 17, 2003

39

0

0

Oct 6, 2004

#5

• Oct 6, 2004

• #5

Yea I'm posative I got a wrong wire, anyone know which one the right one is? I got a cheap $6 soldering kit, I'll use it when I get the right wire

 

gcomfx.com

Founding Member

Oct 22, 2002

3,690

0

56

Republic, MO

Oct 6, 2004

#6

• Oct 6, 2004

• #6

I hooked up everything behind the dash cluster to keep from having to run wires out under the hood....

 

V-Viper

New Member

Sep 17, 2003

39

0

0

Oct 6, 2004

#7

• Oct 6, 2004

• #7

gcomfx.com said:

I hooked up everything behind the dash cluster to keep from having to run wires out under the hood....

Click to expand...

So you took the wire in back of the stock tach? I don't get why its not working, the Haynes book is showing that wire comes from the one I put it to from the engine (shown in pic) ..

 

W

wytstang

Mustang Master

Mar 14, 2004

4,988

4

78

Summerville,SC missing South Fl. weather :(

Oct 6, 2004

#8

• Oct 6, 2004

• #8

Acording to my MSD tfi super coil info sheet the neg(-) on the coil is the one facing the firwall.

 

Black95GTS

Active Member

Jan 8, 2004

1,644

3

38

Marlborough, MA

Oct 6, 2004

#9

• Oct 6, 2004

• #9

just take a multimeter and measure it out... if you get a positive voltage across both points then the black wire from the multimeter is on the negative wire. If the multimeter reads a negative voltage, then the red probe from the multimeter is on the negative terminal.