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Yeah! When I took electronics in high school, we were learning how tubes worked! Transistors were a new thing!

I already have the 700R4. The vehicle is a civy suburban. I'm wanting to keep the vacuum pump for the HVAC controls as they are vacuum operated. Just trying to get a tach to work in the thing. I also have one of those ess sending units for the HJMMVEE. If you ever get yours hooked up and...

Way cool pics. Thank you for sharing! I am/was a Rail too!

After I posted to you the other day, I thought about the B and C points and remembered about the Base, Collector, and Emitter of the transistors and it made sense. If I wanted to hook up an oscilloscope to this circuit and see the waveforms, would I put the negative probe to ground and the...

Is that starting fluid the guy is holding????

The diagram I have doesn't show point B or C. Not sure what they refer to. My ess has 2 pins for a connector. In the diagram I have it only shows one lead from the ess going into the circuit. What happened to the other? Do the pins have polarity? I have the Diesel Page book that has the...

Keith_J thank you for the explanation of how that circuit works. Not sure what a comparator is though. I'll keep investigating and see if I can drive a tach with that circuit and my vacuum pump/ess unit. Could I ask you more about that circuit from Lee Wagner?

I have one of those vacuum pump/ess units in my 84 civy suburban with a 6.5 replant. It is a stock calif. vehicle. I've wanted to hook the ess to a tach but having trouble figuring out the wiring. I have seen the info from Lee Wagner. If I were you, I would go with the alternator tach setup...

I was thinking of that. It's not in pdf format. I'll try PM.

I have SM1546EN and on page 6-21, figure 6-27, it shows the locations of 3 balls. I tried to copy and paste but it wouldn't work. That figure is for the MT654CR trans.

You were lucky. Family had cabin in pineridge and it is gone. :(

I've been to Dinkey Creek but it was a long time ago. How did you fare with the fire? It was BAD. My brother lives in Shaver. He worked for Cal Trans but is now retired. Hope you make it okay with the fire. Nice truck!

Wow! Way Cool! Thanks for the pics!

We had those come through West Colton, Ca. yard going to/from Ft. Irwin to play war games. Lots of trains from Ft. Hood Tx. Lots of M1 Abrams!!! Before U.P. took over they transferred to the Santa Fe lines that took them to Ft. Irwin. Wish I had took some pics. :(

Check out this post. Try bypassing the protective control box.

Don't lose the key for that lock!

I hate when that happens! At least it wasn't too serious. A lot of work to just replace a freeze plug.

I just did that. Forgot about them.