Voltage regulator

Basic G503 jeep voltage regulator info.

[@daviddare5550]

IMPORTANT: Make sure your voltage regulator has a good solid ground. The regulator has NO solid state components which means it will work on EITHER positive or negative ground systems. If you have a six volt system you need a six volt regulator. Same with 12-volt. You briefly mention three relays inside the regulator. The CUTOUT relay disconnects the battery from the charging system with the key off. The other two relays control battery voltage and generator output current. So, when we turn the key on, how does the cutout relay energize (since the battery is disconnected)... There are resistors connected to the regulator case (usually visible from the back of the regulator). When the generator starts charging, current goes through the cutout relay coil, through the resistors, to ground which pulls the cutout relay in which also re-connects the battery. The cutout relay is the only one with normally OPEN contacts. If you have a dashboard GEN light, it will shine brightly until the cutout relay contacts close. The current relay regulates the generator field. More field voltage makes the generator outputs more. So, for troubleshooting purposes, if you temporarily jumper the BATT terminal to the FLD terminal, your generator will output at its maximum current. The voltage relay senses when the battery is up to voltage, then it 'dithers' on and off to maintain proper battery voltage. THIS is the relay to adjust for proper battery voltage. One last thought: Stay away from 8-volt batteries. Your system is designed to charge six volts. An 8-volt battery will never fully charge on a six volt system which shortens the battery life.

[@peterboytchev6899]

Thank you so much for this video I learned a lot from you. Amazing simple Way you explained everything

[@revolution3797]

Appreciate the video hopefully you are still around and doing well.

[@garryludwick2990]

Very good explanation. Doing a garden tractor, 12 volt but the same should apply

[@hummernutsfl]

Yes, 12v is the same principle. Just higher voltage.

[@rogerk7194]

Very good sir. Thank you for this video

[@albertcosta5755]

Super helpful Lew!!!!! Thank you for your videos!!!!!!

[@ShimonKupferman]

Thank you very much for your effort to shoot and explain!!

[@pointerg6181]

That was very helpful. Thank you for your efforts on making this video.

[@richardlewin1596]

Thank you for this. Very useful.

[@hummernutsfl]

Glad it was helpful!

[@abelglez1760]

Sir with all do respect are some how related to Hickok45 cos you just look like him. Thank you for your videos 😎👍

[@hummernutsfl]

Not that I know of.

[@Dl63238]

namaste from india I made regulator in early 90 s using Darlington cicuit using different value resistance and diodes this one is older one using relay switchi g

[@woodserjimmy]

Hi Lew, thanks for this really informative video. I have a lot more confidence about fixing my jeep. It has an 8v battery in it and idles at 8.3V and puts out 8.5V when revving. Do you know what voltage I should be aiming at for the idle and recharge please? My problem is that the battery keeps running dead and I assume it is the VR not recharging.

[@hummernutsfl]

Correct. The VR is set to charge at about 7.3 or so. Loose the 8v battery, get a 6v and check the charge output is 7.3 or 7.4v. The 8V battery is only getting a partial charge because the VR thinks there is a 6v there.

[@woodserjimmy]

Hi Lew, I’ve had 8v batteries in the jeep for the past 14 years because Inwas told it was better than the 6v. This year the jeep stopped charging the battery and it is presently putting out around 8.5v at high revs so not enough to charge. Thats why I was going to look at the voltage regulator, clean the terminals and adjust the thumb screw on the F like you say a in the video. If that doesn’t work Incan revert to a new 6v battery but will then presumably have to adjust the voltage charge anyway to around 7.5v. Do I use emery paper such as wet n dry but dry to clean all the metal parts and then alcohol. Is there any other cleaning methods? Thanks

[@hummernutsfl]

@@woodserjimmy got it. So the VR was tuned to 8v previously. Wet dry paper works or a small fine flat file. And cleaning with alchohol or other solvent that leaves no residue is important. Take a look at the contacts. Can you see a Peak on one side and divot on the other? Even smooth wear? Something else to check is the carbon resistors on the bottom side. They can crack and mess things up. Check for burnt insulation on the coils. Good luck and keep us posted.

[@pantherplatform]

8v battery?

[@garym8100]

Awsome, can you please help me by explaining the current reg and cut out. My mb is killing batts, my ford keeps going flat. Im hoping to use what youve shown us to figure it out. Thanks so much Lew, from New Zealand!

[@hummernutsfl]

Basically the cutout kicks the generator on and off based on the rpm. The genny starts putting out at about 800 rpm plus or minus. The current regulator will limit the genny as it can put out a lot of current and fry things if not regulated.

[@Dl63238]

I can give technology to make electronic current and voltage regulator for generators and cars tractors for various current calues

[@whiteboy_rick]

Good video

[@SamCottongim]

To lower the voltage via the Voltage Regulator thumb wheel, which way should the thumb wheel be turned? My ‘43 MB’s generator is charging my battery at 8volts at idle. I’m trying to lower that but not having much luck.

[@hummernutsfl]

To reduce the voltage relax the spring tension. Does not take much. To increase voltage , increase the tension.

[@LubaLuba1]

I replaced battery and alternator but still alternator not charging battery disconnect battery cable car turns off checked if any power on the signal connection (the two wires) nothing no power. It must be voltage regulator a kit to by pass it?

[@hummernutsfl]

These details are for using a generator, not an alternator. Alternators are different in several ways.

[@revolution3797]

So I'm not sure if this will retain to what you're saying in your video. I have a 4 cylinder engine that was from world war II ZXB M5 GENERATOR. It has an aftermarket regulator and breaker box. So I got to figure out what wires go where. At the moment I'm just interested in trying to get the battery to charge and make the gauge work.ATM Gauge is not responding because there's no wires coming off the regulator going to a battery source. It's just a generator ran from the engine on a belt and then there's three wires coming out of the generator light yellow and green that goes to the regulator. The white wire is battery the yellow wire is armature and the green wire is FLD. I truly don't understand this even if you tell me the easiest way to do it. From the regulator do I just need to run a wire straight to the battery or get a wire from the regulator from The battery source on the regulator to the positive side of the battery cable that's on the back of the gauge panel?

[@hummernutsfl]

We need a bit more info. What are the terminal marks on the regulator? And the breaker box you mention, where is it and what is it set up for?

[@revolution3797]

It's really hard to explain it so I'm actually going to post a video explaining my situation if you don't mind could you please check it out

[@ruebencover5795]

Hi Lewis, I have watched the video with great interest and I am having a problem . I am doing a full restoration on my jeep. I am putting a temporary wiring harness together just to get the jeep fired up . I have followed the wiring diagram but when I crank the starter over the ammeter shows a positive charge and if I swop the wires over on the back of the ammeter it stills dose the same thing. I would have thought it should show a negative. I think I must be doing something wrong if you could help it would be very much appreciated Best wishes mark

[@hummernutsfl]

Can you PM me a sketch of your temporary wire diagram?

[@ruebencover5795]

@@hummernutsfl thank you very much for coming back to me on this. Wot do you mean by a PM .?

[@hummernutsfl]

@@ruebencover5795 PM, private message or email [e-mail]

[@relaxnewmexico7619]

Is that Erika Viking we hear in the background?

[@hummernutsfl]

Dont remember. Could be.

[@mrhamburger6936]

There are two types of generator systems on motor vehicles are there ? I remember a long time ago there was I think it was a b circuit and ?

[@hummernutsfl]

www.jeepdraw.com/images/G503%20GENERATOR,%20CURRENT-VOLTAGE%20REGULATION%20&%20CUT%20OUT%20OPERATION%20%5BCVR%5D%5D20.6.pdf

[@reynaldoneo523]

Sir i watch your video and i truly interested because i have owner jeep 4k engine..voltage regulator with 6 wire...i have digital voltage gauge.. question my meter sometimes reach to16v then reduce to 15v..it is normal..it will not effect the battery....kindly need advice what to do..thanks

[@hummernutsfl]

A 6v batter should charge at about 7.4v. 12v system at 13.6 or so. If you charge too fast, you can boil the battery.

[@albertcosta5755]

Hi Lew, I need some help,.... How can I polarize my generator, seams that it is not working. (if I disconnect + from battery my engine stops) Thank you in advance for your help!

[@hummernutsfl]

To properly polarize the generator, connect all wires from regulator to the generator. Remove FLD wire from regulator post and Flash FLD wire to BAT post on regulator and then reconnect FLD wire to regulator post.

[@jamescaneda9515]

I have a 6volt positive ground International51. Can I install a regular 6 volt positive regulator without changing anything??

[@hummernutsfl]

I believe the regulator is set up based on pos or negative ground. So you need the specific version.

[@alfiecaponga9762]

What if the F was not connect? Is there coming problem in battery?

[@hummernutsfl]

Not sure the impact of the field wire not being hooked up. I doubt it would damage it.

[@chicagojoe5659]

Nice jeep

[@rickybosephus2036]

Sean Hannity? I think you means Glenn Beck! lol

[@MrJeep75]

I got a g506 Chevy I'm about ready to switch it to 12v, I had the generator and regulator back to the shop twice, they said they are fine but still won't charge, I ohm check the wires from generator to regulator test good and it's got power to regulator, could it be a bad gage, I'm at my wit's end

[@hummernutsfl]

A basic test is to fire the truck up, set the throttle at 800+ rpm. Then pull the positive cable from the battery. Does the motor die? If yes, we have an issue. The test shop would have had to polarized the genny so that step should be done. Let us know what happens with this basic test.

[@MrJeep75]

@@hummernutsfl yes it does I already tried it, and about everything else, about sick of 6v junk

[@hummernutsfl]

Ok, be patient. It is almost always something simple and cheap. With the lid off the VR, running at 1000 rpm, check the cut out regulator. Are the points closed? If not, set up your meter across the battery and close the points for a moment. Did the volt meter jump from 6v to 7.4v or so?

[@MrJeep75]

@@hummernutsfl haven't tried that yet

[@hummernutsfl]

You can then follow up with this test: forums.g503.com/viewtopic.php?t=289862

[@facebook2k7]

At idle its 7V, revving it showed less than 7V. What gives?

[@MrJeep75]

Are these B circuit I Hurd they were

[@hummernutsfl]

Yes, war time jeeps are B circuit.

[@MrJeep75]

@@hummernutsfl I believe this was my problem with my g506 Chev I was trying to polorize it on the armiture side

[@MrJeep75]

Got a g506 Chevy can't get to charge got a rebuild generator, tried to clean regulator, on it the big wire is on armature

[@hummernutsfl]

Did you polarize the generator?

[@MrJeep75]

@@hummernutsfl yes I loosen the belt and tapped the armature connection on generator didn't work

[@hummernutsfl]

@@MrJeep75 when you say you loosened the belt? Fan belt? Not sure what you are trying. Here is how to polarize: Reconnect the wiring and battery cable. For an externally grounded field like on a Willys, momentarily connect a jumper between the BAT and ARM terminals on the regulator, resulting in a spark. Don't clip the jumper in place, as an instant is all it takes. Battery power is present at the BAT terminal, and a surge of current will travel through the field coils via the common connection at the ARM terminal. With externally grounded field coils, the ground path is through the voltage regulator's internal contacts.

[@MrJeep75]

@@hummernutsfl I read on the internet that you do it without it running, and you disconnect the belt and touch armature post with power

[@hummernutsfl]

@@MrJeep75 ok, no need.to loosen the belt. Just follow the instructions I posted. May take a second try. Are you sure all the wiring is right?

[@garryludwick2990]

Lost me at the end... a circuit, b circut????

[@hummernutsfl]

All WWII jeeps are B circuit. CJ series are A Circuit.

[@nhacrefrigeratorandelectri9331]

Pliz hindi mebataye

[@GenerationOldschoolEspañol]

too much talking but no action

[@melvis2017]

Please shut for that devil music it's horrible

[@boyracer3477]

I'm sorry, but I just can't listen to you with the music in the background. What in the hell made you think that was a good idea? No upvote. No subscription. Turn the music off and make your presentation.

[@carlschoener23]

Why this stupid background music?

[@hummernutsfl]

If you don't like it, don't listen. Shop stereo picks the tune list.

[@jamesnash6861]

Completely useless.

[@hummernutsfl]

Please explain what is missing so I can improve it.

[@rickrascon6487]

Get to the point