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Begin forwarded message:
Sounds highly promising . First description is all normal stuff . VR and wiring is working right . And probably always does, Second issue you note is not that it is "discharging " ( even though factually true) rather it is not charging enough on heavy loads to offset that added load. Words are very important as true " discharging " happens with key off , kills battery due to leak sitting still. Discharge indication with engine on over 1500 rpm is due to not enough rpm or defect in charge system . Also normal at times ( at idle with headlights on ,or rainy night defroster / wiper on too ) Headlights take more than gen makes at idle by themselves especially if other stuff is on too . So it takes some from the checking account ( battery) . It cannot be headlight switch , but , as odd as it may sound , both of your bad experiences involved night drive ? Plus you upgraded headlights ( that is ok ) but might be higher watts . Also ok but taxes charge system more . 30 A times 12 is 360 watts = all you have as a total max to use running along at higher rpm . 4x35 w ( stock)= 140 w hi beam . Halogen can be up to 50 or 55 . 220 watts still ok . Wipers , heat fan, etc play into this . 100 watts each ? Why Ac gen is larger at35?or 40 . New car alternator today is 60-100 A ( 700-1200watts , plus alternator charges more at idle)
Why I say odd is that dead battery after night drive but ok in day is exactly what a slipping belt does . Or second , a generator with troubles . ( arcing brushes) . This could all be as simple as a slipping belt ? HAS to be quite tight . Tighter than you might think. It is a classic symptom / syndrome back in the day . Sometimes no noise . It is either that or still a marginal generator , or too long belt ?
Interested what you find . I had this on a six volt Packard , went through your dance about 1965 .
Working right = over about 1000 rpm should show amps at middle or very slight charge , headlights , heat wipers on in day too ..... letting it idle will show discharge . NOW IMPORTANT = That is 100 % normal . And dimmer lights . Gen going too slow to make 200 + w , battery supplies deficit for a bit . ( why discharge indication)
A Good way to check charging is lights brighten up perceptively with rev off idle .
Hope this helps ! Even slipping belt charges enough in day ... Look for shiny belt and shiny pulley . I believe rough spec is you can deflect only 3/4 " in middle of long span max with thumb . Needs pry bar to be that tight . That you changed it back might have slightly tightened belt .
You are doing great . Understanding it better than fixing it ! Almost !
Sent from my iPhone
So here's the latest on my F's electrical charging issue -
This week Michael Burke sent me another generator (Autolite GJC7012A, which John Holst's chart says fits '56 Chrysler, '60 Imperial, '57-'60 Plymouth and Dodge). I installed it, but stupidly didn't compare the positions of the 'ears' for bolting on. My fan belt was a bit loose, with the generator pivoted to the end of the slotted bracket, so couldn't tighten the belt further. But I hooked up and ran the car. It screeched some, and the ammeter showed the car not charging, just like with my existing generator. Am assuming the ears on this other generator are positioned a bit differently than on my exiting one, causing this loose belt. The generator belt pulley is the same diameter on each of these 2 generators.
WIth Michael's generator installed, I tried loosening my P/S pump, to slide off that belt, to replace my generator belt. I couldn't figure out how to loosen that belt, so just retightened the P/S pump, and left the belts as they were.
- So then I removed Michael's generator and reinstalled my old one. Car was still not charging.
Today I drove the car to a cruise night, 45 miles from home, in Morris, IL, all interstate driving. Seemed bizarre, but the ammeter read that the car was charging as it should! I checked the battery when I arrived, and the meter read 12.92, which was similar to the 12.85 fully charged reading I had at home, before heading out! It was charging the entire trip to Morris.
Then, heading home this evening at about 8:30, with headlights on, the ammeter again read discharge! After my 45 mile, 45 minute drive home, I checked the battery again, and it reads about 12.42 - still enough to start the car, but clearly discharging.
Could there be a problem with my headlight switch, that's causing this? A few weeks ago, I noticed the dash lights seemed to be flickering just a little. I have not seen this flickering recur, and there was no flickering tonight. I tried turning the lights off and on a few times, but no effect to the discharging on the ammeter.
I've changed the generator regulator a couple times, and did polarize the ones I installed. I do have one more new regulator, that I can try to install, if you think that may be the problem.
I welcome your thoughts?!?
"Mark O" <354hemi@xxxxxxxxx
Tuesday, August 2, 2016 10:41:17 PMSubject:
Re: Noel's 300F electrical issues -
Wish I had a spare minute to come over and assist. Hope it's the generator.
Posted by: John Grady <jkg@xxxxxxxxxxxxxxxxx>
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