STE/ICE connector Tach Reading

[motormayhem]

I looked in the tm's and found that pins C and D on the STE/ICE connector in my m1009 are from the tach buffer. I thought when I hooked a multimeter to those I would get a reading that I might be able to decode into a guesstimate of the rpm but it reads 0 on dc and ac. Anyone else tried this and did you get a reading or am I doing something wrong?

 

[cranetruck]

Does this help (PS mag from old site)? It may give you something to work on at least...: Steel Soldiers :: Military Vehicles Supersite

 

[JohnFire]

there was a whole thread on adding a tach to these trucks but I don't think there was a verdict posted

 

[motormayhem]

But should I have voltage coming from those pins? I know you can add a tach and tap off the alternator which is what the diagnostic does, but I wasn't sure if I needed to use a ground pin for something else in the connector to get a reading.

 

[cranetruck]

Just guessing here, but if the signal is capacitively coupled, you may have better luck using an AC scale on your meter.

 

[motormayhem]

Just guessing here, but if the signal is capacitively coupled, you may have better luck using an AC scale on your meter.

Tried both, nothing.