Sorry to take so long to get back on this, but I had an emergency and had to be gone for a few days.
I'm back in the process of making up a wiring harness for my Model A and I just wanted to know what each component would pull from the system. I know I could have just used the recommended fuse for each circuit and not worried about it, but I wanted to know for myself the values. Like they say, "Inquiring minds wanna know".
I took a good 0-50 amp range ammeter and tested each item individually, to see what the amperage draw was. Here's what I came up with:
1. Radiator cooling fan. It initially surges about 28 amps to start, then settles to a steady 9 amps.
2. Alternator energizing circuit/ electric chokes (2 carbs)/distributor (HEI)/ instruments. All four components are fed with Ign switch ON. I checked current flow on the feed side of the Ign switch. Ammeter goes up to 15 amps, then slows down to about 4 amps in just a few seconds, at Idle.
3. Park lights- 1.2 amps
4. Dome lamp-.95 amp
5. Headlights- almost 9 amps
6. Heater motor- 9.5 amps
7. Stop lights- 4.2 amps
8. Turn signal- 4.3 amps
9. Wiper motor- 4 amps
Hope I didn't leave anyone hanging.
Oops, I forgot to test the solenoid operating amperage! Will be back later.
