1998 Alpine Speedo and Tach sensor locations

[gmcgene]

I need to locate the speedo and tach pick-up sensors on my 1998 Alpine with Cummins 6c 8.3 mechanical engine and Allison transmission.

I want to verify that sensors and wiring are secure before removing the instruments and sending away for repair and calibration.

One of the mechanics at A&N Diesel says that some vehicles with the Cummins mechanical engine use the alternator for tach signal.

Any suggestions?

[veraken]

Don't know about the speedo, but on mine the tach is feed from the alternator. I had a Leece Neville 2824LC which I replaced with a Delco Remy 28SI