new tach instal

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partybarge341

Cadet
Joined
Aug 27, 2009
Messages
10
hello, i have been reading about tach installs for my 87 v4 88spl on the forum and found on my control box below the key switch a black rubber "plug" about an inch long , that has amp written on it . could this be where the tach plugs in. there is a gray wire coming from the engine i assume that is the signal wire mentioned on the forums could i cut in to the harness and find this and connectit to tach?
 
Silvertip

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,762
Re: new tach instal

That is a tach connection. It has +12 volts (key on), ground, and the tach signal. You can make your own plug if you are the least bit "inventive" or you can tap into the grey wire, or you can buy the tach harness here or at Cabelas. Your call.
 
SparkieBoat

SparkieBoat

Captain
Joined
Aug 17, 2009
Messages
3,643
Re: new tach instal

I saw those harnesses for about $10 somewhere but cannot remember right now...google it.
 
5150abf

5150abf

Vice Admiral
Joined
Aug 12, 2007
Messages
5,808
Re: new tach instal

When I did mine I used stranded copper wire and soldered the ends to make a pin that fit in the plug holes, it worked pretty well and you don't have to cut into any wires.
 
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