My Ram Jet computer has a tachometer output that needs to go to the stock tach in my 89 Formula (originally L98) so that my tach will work. Anybody know where to splice this into the stock wiring harness?

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L98, 3.27 9-bolt, Hooker shorty headers, custom 2.5inch Y-pipe, no cat, 3inch 2chamber flowmaster, JET AFPR, Ported MAF, Best ET: 13.86 @100mph. 1.99 60'
17 inch ROH "ZS" wheels. 17x8.5(front) and 17x9.5 (rear). Firestone Firehawk SZ50s. 245/45/zr17s and 275/40/zr17s. T56

On the way... Radar Blue 89 Formula, T56, Ram Jet 430, Ram Air, 17inch ROHs.

 

I sumbled upon the tach wire under the hood mistakeing it for the advanced timeing wire. Mine was right near the distributer cap and it had a clip that you can clip and unclip. So I would try to unclip that wire start the car and see if the tach does not go up when you hit the gas, then you know thats the right wire.

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89 Formula Firebird
Red with T-tops
5.0 305 FI
Soon to be a 400sb.

 

That was the right one. Thanks. It was white and had a connector just like the wire you use to do your timing.

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L98, 3.27 9-bolt, Hooker shorty headers, custom 2.5inch Y-pipe, no cat, 3inch 2chamber flowmaster, JET AFPR, Ported MAF, Best ET: 13.86 @100mph. 1.99 60'
17 inch ROH "ZS" wheels. 17x8.5(front) and 17x9.5 (rear). Firestone Firehawk SZ50s. 245/45/zr17s and 275/40/zr17s. T56

On the way... Radar Blue 89 Formula, T56, Ram Jet 430, Ram Air, 17inch ROHs.