So the new regulator went in as plan. With the original 1948 regulator cap fitted from my old damaged regulator, it is not possible to tell that this regulator is a 2019 hi-tech one.
First and most important step before doing the job is to "polarize" the dynamo. This is required because any time the dynamo or regulator is removed from the car, the dynamo may, upon refitting, change its polarity. My car is a positive earth vehicle. Polarizing the dynamo involves disconnecting the two wires at the dynamo. With the battery earth fitted, run a wire from the Negative terminal and lightly touch the 'F' terminal of the dynamo. A small blue spark will be seen. This completes the polarization operation. Next is to remove the 25 Amp fuse under the cap of the new regulator and fix back all the wires to the 9 posts. I had marked the wires at the time I took them off the old regulator so went easy. The fuse removed earlier was installed and the car started with a prayer. Here are the results:
The thing on the right with JAGUAR on it is the fuse box cover
As they say, "The proof of the pudding is in its tasting", here are a few pictures of the regulator doing its thing:
At idle (700 RPM) the ammeter shows about zero or rather -2amps. This is how it should be. note the VW key. This is my spare keys bundle.
At fast idle we should get a charge from the regulator. Here is a picture at 1300 RPM
We are getting a reading of almost 15 amps at 1300 RPM. The reading will fall down to about 7-8 amps as the car is driven and the battery gets charged.
Here we have all the electrical load on. RPM is 1300 and ammeter is showing 1-2 amp charge. At 1500 RPM I noted about 3-4 amp charge.
So far all operations are as per original functions. Road test remains. It will have to be a somewhat long run for 20km or so to see how the regulator performs and more importantly, how my dynamo repair holds up.