D19 wiring diagram!

Scott

If you're talking about the typical GM Delco unit you can run a jumper wire from the #2 terminal to the "Bat" (output stud) on the alternator and the #1 (field) connection can be run through a small light bulb (in series) to the "on" position of your ignition switch. In other words this light will come on when the key is turned to the "on" position (not the start position) and once the engine is running and the alternator is working, the light will go out--similar to the idiot light in cars/trucks. Depending on which model, some of these alternators need a resistor installed but I don't remember the OHM rating of the resistor. There are many wiring diagrams available on the web too--just search on "Delco Internal Regulator Alternator" or something similar. You'll find many different versions, but most will hook up like I said or something close. You can also install your ammeter in series in the battery output wire from the alternator. Hope that helps you out.