My truck is a 91.5 Should I have the factory tach plug under the dash? I looked at the sticky and looked at my truck but I cannot find it. The only loose plug in the area of where the sticky says is only a three pole plug.

 

I bought a 91.5 last thurs and I didn't see the tack plug under the dash either, but I didn't look very well in dark w/flashlight looking truck over haven't had time to investigate anything.

 

How do I hook up a tach if I do not have wiring. I have the isspro 4000 rpm tach #8508. I hope I did now waste my money on this tach.

 

My 91.5 does not even have the pick-up sensor on the front of the engine. The Tach wiring may have started on the 92s.

There is a way to hook up a tach pick-up on the alternator.

 

Yea my 93 has the tach hookup. im pretty sure weve all agreed that 91.5 did not have it. i dont think 91.5 has a crankshaft sensor on the front either like a 92 and 93 because it doesnt have a PCM controlled engine.........
so the aftermarket tachs usualy get hooked up to the alternator.

 

Yep, 91.5 did not have the tach wiring and crankshaft sensor.

 

That's what I was thinking.

 

ad removed .....and could someone post a pic of where this connection is located and what it looks like...that would be great

 

IssPro also has a tach kit that involves gluing 2 magnets on the crank pulley, then using their pickup you get pulses to feed their tach...
It puts out a healthy spike so it might work IF the tach is not a gasser tach -
The ignition coil puts out more of a spike.

 

I installed an Autometer tach on my 92. It has the plug in harness under the dash, but I did not feel like playing around with it at the time. So I bought a tach that had a small sensor type thing that you clamped to the side of the alternator, and i've had great results with it. A year ago I bought it for around a $120, but with inflation and such, it is hard to tell what it would cost today!

Wheelo

 

will any of these tach's work with our trucks? http://www.glowshiftdirect.com/searc...ind=tachometer