I resently installed a Autometer speedo into my 3rd gen LS1 swap. I just wanted to post how it was done if anyone ran into any confusion on the install. I was using the carbon fiber series ( product id (4789 , 3-3/8 ", 160mph, push button calibration, 500-400,000 ppm, )

First install speedo and wire up the power ground . Also the lighting bulb.

Next you will need to find the VSS high signal. on my 98 pcm it was the ( RED connector, PIN - 7, YELLOW, Vss high signal, ), splice into this wire, and simply run that to the SIG terminal on the back of the gage, and leave the VSS OUT on the back of the gage empty. To see if its working right, turn ignition on and the gage should pin out at half scale and go back to 0. You will need to then calibrate the gage, ; Hold trip/start car/release, it should then go to max scale , then go to a spot where you marked off 2 miles, stop at the start, push trip again/release , it should then go to half scale, drive the 2 miles, stop, push trip and release, the gage should go back down to 0 scale then. Drive off and it should be working . Hope this might help someone

 

gotta pic of this?

 

Your a god thank you

 

I ran a similar one on my old car for the LT1/LS1 setup Never really got a perfectly accurate reading. So glad I went to a GPS Speedhut unit this time around

Jay

 

I bought speedhut gauges for my swap and that's all I'll ever use!

 

One other thing I'll note is that about 150 miles after I installed this speedometer and calibrated it I had an issue with the needle going crazy while idling in line to get into a car show. The miles were counting up unbelievably fast while it was doing that too even though I was sitting still. I believe it was an interference issue with the signal wire, so I twisted the signal wire and another wire together and I have not had any more issues.