Rally Dash Wiring Harness Questions

67Dart273 said
^^You may be right and I nearly mentioned might be handy to run an additional fuse

So far as "sources" tho, there are only two sources, ultimately. That is the key "accessory" or the key "ignition run." For me, I don't want ANY of the dash components on "accessory," no need.

Actually I was wrong for the 71 model at least. I would have bet that the indicator lamps were on a fused circuit. Maybe they are in earlier models. dunno. And I had though the rally panels park lamp was routed to ports 5 and 6 . Its actually ports 4 and 6. P4-20DBL was brought from a weld splice to port 4 of the round connector to feed this indicator lamp. That is the DBL from ignition switch which also goes to port 'N' of bulkhead.
A black wire from port 6 goes to the hand brake switch and to port 'M' of bulkhead connector leading to the low brake switch.
So the unanswered question is why they brought 2 separate 12 volt switched wires to these earlier panels? Seems they did figer out how to operate 3 components with one source ( per that 72 model drawing above ).
I suppose if this owner wants he could just jumper the DBL switched wire he has evidently already defined and placed at port 4 over to port 10 to feed the inst' voltage regulator but...
P4-20DBL might not carry the load. The regulator supply is supposed to be G1-18BK. Notice the root source G2-12BK from ignition switch also exceeds J2-16DBL from ignition switch? That's a clue.
I wouldn't pretend to be smarter than their engineers. I would add the G1 from the G2 source just as they did.
Keep in mind that the limiter in a rally panel does operate three of 20 ohm instruments while standard plug in type regulators operate only two instrumnets. In later models that's one 20 ohm and one 13 ohm. They changed the fuel gauge to 13 ohm at about 72 model. Another clue.