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EFV-8 Club Forum / General Ford Discussion / Headache

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Discussion Topic: Headache -- page: 1 2

cliftford

04-06-2021 @ 8:22 PM

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blarge is alsolutely correct. It is easy to fry these units if not done properly.

blarge

04-06-2021 @ 9:13 AM

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The polarizing instructions from a Harley are not correct for a Ford V8. The Ford uses a "B" system and requires that the Field terminal wire be removed from the voltage regulator and momentarily touched to the Bat terminal of the regulator.
The Harley used the " A" system, which is also on GM cars. Bill Large

This message was edited by blarge on 4-6-21 @ 9:14 AM

srg

04-03-2021 @ 12:47 PM

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This is out of my Harley book; Caution: It is advisable to "flash" field coils whenever wires have been removed from generator or regulator; or after generator or battery has been removed and is reinstalled. This is done to make sure generator has correct polarity. If polarity of generator is reversed, relay points will vibrate and burn. "Flash" field coils by momentarily touching a jumper wire between "BAT" terminal and "GEN" terminal on regulator, after all wires have been properly connected and before starting engine. The momentary surge of current from battery to generator will correctly polarize the generator.
(I also have a 37' Ford).

This message was edited by srg on 4-3-21 @ 12:49 PM

silverchief

04-02-2021 @ 10:32 AM

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Thank you guys.

All good suggestions.

I'm working on it, and will advise of any progress.

TomO

04-02-2021 @ 8:38 AM

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Bill,

The voltage across the battery should read 6.3 volts when fully charged after the surface charge has been removed by no activity for 12 hours or more or 6.6 volts when checked right after charging.

If you have the 6.3 volts, then leave your meter connected and crank the engine with the ignition switch off. The meter should read 5 volts or more. Typical is 5.5 volts. If the reading is less than 5 volts, the battery is either not fully charged or sulfated. Recharge the battery and use a load tester to determine if the battery needs to be replaced.

Your usage is considered very severe usage and a battery cannot survive very long under those conditions. You should be connecting a battery maintainer like Battery Tender after every drive to get maximum life out of your battery.

Tom

juergen

04-02-2021 @ 7:44 AM

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From your tests, the battery is not getting charged. A lead acid battery voltage is about 2.12 volts per cell so a fully charged 6 volt battery should be around 6.3 volts fully charged. And it takes about 7 volts to replenish the charge after you drain the battery. Since you only measure 6 volts it is not getting enough charging voltage. Your light test just shows that the generator is powering the lights above idle but not enough to charge the battery if you only register 6 volts. Check to see if the voltage at the generator is above 7 volts after a start and on fast idle. If it isn't, I'd suspect the generator or the regulator. If it is above 7 volts, then check each wire break point from the generator to the battery to see where the drop occurs.

This message was edited by juergen on 4-3-21 @ 6:37 AM

1931 Flamingo

04-02-2021 @ 7:26 AM

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Check the NEGATIVE (if still pos grnd) at the solenoid for corrosion. I just went thru this on my 40. Started upOK, two days later nothing. Everything clean and tight, 6.3 V at batt and sol. Had batt checked, low. Replaced it under warranty, still nothing. Neg cable had elec tape on it (probably from decades ago), removed the tape and found blue/green corrosion. Cut cable back and soldered new end on it. It hasn't turned over this fast in the 2+ years I've had it.
Paul in CT

37RAGTOPMAN

04-02-2021 @ 7:25 AM

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SILVER CHIEF,
when you say it spins over,
how long does that take , 3'4'5' spins ? or longer,?
that engine should maybe spin 1 turn at the most, if engine is hot , not using the choke or depressing the gas pedal
turn the key and just hit the button
do not use the gas pedal and see what happens,
it should start very easy,
not draining the battery
also how much is it charging ?
what is the starter draw ?
hope this helps 37Ragtopman

trjford8

04-02-2021 @ 6:29 AM

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In addition check all your grounds to make sure they are clean , tight, and you have the correct size cables. If you have the older braided ground cable I would toss it and get a new one or use a regular type insulated cable.

37RAGTOPMAN

04-01-2021 @ 3:30 PM

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HI silverchief
I would take the battery out and charge it, then take a reading, should read 7.2 volts if it is fairly new, 2.5 volts per cell
let NAPA test it ,,,if they say it is weak, [ which I suspect } I have had problems with their battery's
Get one from another source,
I believe this is your problem.
or maybe your starter has a higher draw then normal
Have you checked starter draw, and make sure all your cables are heavy duty 6 volt, clean and tight
hope this helps 37Ragtopman ,MAINE

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