Isspro Tach Plug In for 91-93

[Shrimpy]

I was going thru some of my junk (stuff) and found the number for the isspro tach plug in on the 91-93 trucks. This goes from a Isspro tach to the connection under the dash. It is Isspro Number R8912-92, it is called a leadwire. If you have a 3 3/8 Tach make sure that the #2 switch pin (inside the tach) is "On" and all the others are off.



It also listed what the wires from under the dash do;

1. Grey with Light Blue Tracer... ... ... . Signal to Tach

2. Black (listed Red in Service Manual)... ... Switched Power "Ignition"

3. Orange... ... ... ... ... ... ... ... ... ... ... ... ... ... Lamp Power

4. Black ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... P. C. Ground



When I ordered it they sent me a schematic to hook up both a 2" and a 3 3/8" tachs (I had the Air Core Tach 8585M). Official name for the leadwire is called... ... . Sensor Kit #R8912-92, cost $15. 50.



Hope this helps someone... ... .



Jim Ryan

 

[JFitzgerald]

Thanks Jim,



If nothing else, knowing the wire colors/functions will help me attempt to hook up a gasser tach in my truck.