Second attempt at wiring diagram

[73c20jim]

This wiring diagram includes:

DRL when HL are off
Direct power to HL
Seatbelt warning light and buzzer
Headlight on warning buzzer

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[73c20jim]

@bucket

 

[Camar068]

this may help simplify things a bit. The orange H & L signals come from your original plug that plugs into a high/low bulb. You have a few options to control the DRL relay on the left such as an oil pressure switch & ACC.

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[bucket]

@bucket

Keep in mind, I only ever read diagrams to diagnose a problem. Not design a circuit.

But with that said, it's all looks good to me. It looks like a very good and simple way of combining all those functions. Where are you going to mount the separate DRL's?

 

[73c20jim]

Good question. Behind the grill might not be bright enough. On top of the hood, cool but gaudy. Off the front bumper, difficult to mount.

Maybe some trick mount in front of the grill???

 

[73c20jim]

There are extra switches in the NSS that are not used in the 1973. They connect only when shifter is in D, D2, D1. It's already there, so why not use it.

No need to add more complexity. By the way I do not understand your diagram.

All this of course must be tested, and functionality confirmed.

 

[bucket]

Back in the day, everyone mounted lights to the top of the bumper, or the bottom. I don't care for drilling holes in nice factory bumpers, but lights on top of the bumper don't look bad.

 

[73c20jim]

I got a nice chrome bumper up front. Drilling it might be the last solution. Maybe I can find some bumper clasps.

 

[73c20jim]

Went outside (big effort, it's HOT outside), and found two round holes on underneath side of bumper, at ends of bumper. Problem solved.

 

[Camar068]

Looks like your ckt is good. Good idea using the NSS as a signal to control the DRL. Good job drawing it out also.

The ckt I drew is for using low beam headlights as the daytime lights. If the relay on the right (low beam) or the relay in the middle (high beam) are ON (headlights on), then the DRL relay on the left will never send power to the low beam bulbs.