Ammeter to Voltmeter...who does it?

Bronze Barracuda said

Ok great analogy on the stream bit, very easy to visualize.
I just did a google search I learned something new just now.
I always thought a fusible link was just a normal wire with a fuse inline with it. I did not realize that it is actually just a wire itself. Cool.

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What the Y does is it also takes a bit of load off the bulkhead connectors since its splitting up the power requirements through 2 wires. The schematic B shows the 2 wires bypassing the bulkhead connections altogether and just being straight through. This is not really necessary when you do the alternator direct to battery bypass, and use new or really cleaned up bulkhead connectors at those 2 firewall connections, and apply dielectric grease to the pins to keep moisture out that will corrode the contacts

On police package cars chrysler did just that. Drilling 2 holes in the firewall and installing rubber grommets then running the leads through the firewall bypassing the bulkhead connector. Police cars had more powerful alternators required to run the lights, and radio gear. Chrysler knew this was a weak link with a 120A or greater alternator and so bypassed it at the factory on police vehicles.