Choke- Alternator/Charging System
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From: Bel Air USA
A zero on a digital or analog ohm meter indicates a short not an open. What is your meter reading before you touch the leads to the stator? It should be indicating an over range which depending on the number of digits should be something like 1999.
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Freshman User
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just put it all back together still no output.So I took connecter off reg. tested field to ground with batt connected and got a negative 4.5 ohm reading. So i unhooked the batt and retested the same way field to ground now i get a positive reading.what does the neg.mean? I'm thinking I've got a grounded field wire. If this is so can I just run a new separate field wire from alt.to reg?Instead of messing with the whole bundle of wires that prior owner has about a roll of tape on.
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yes sir that makes sense about the controlled short .I just left it unhooked for now to be sure till i can check it. i reinstalled a working reg an alt a few minutes ago and it still has no out put.So i pulled the reg connector back off and tested the field to ground with batt hookrd up and got a negative 4.5,then i unhooked the batt retested and got a positive reading of 4.5. does this mean i have a grounded field wire in the harness?i was told if the reg is'nt working the alt won't know to produce power. If this the case can I diconnct the old field wire totally and run a new wire from alt to reg same gauge same connectors without disturbing the other wires which alreadt have 5lbs of tape on them from prior owner
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electrical genius wanted
when testing the field circuit at vol.reg.connector with the batt.hooked up I'm getting a neg 4.5 ohm reading.when I unhook the batt and retest the field I get a pos.4.5 reading .does this mean i have a grounded field somewhere in the harness ? does the neg sign indicate grounded resistance. would this condition make the alt, have no output? If I terminate the old wire and just run a new wire same gauge same ends from alt.to reg. will this solve the problem? did this aforementioned problem ruin another stator? 84 f-150 300 6 auto air xlt gauges not dummy lights,
Last edited by doug84xlt; Feb 17, 2004 at 05:29 PM.
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From: Virginia
As kioolt stated in the other thread, having voltage in a circuit, and having the meter in ohms, will give weird readings because the meter itself is putting a out a small voltage in the ohms mode. When this gets mixed up with the circuit voltage, it throws it off.
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Joined: Aug 1999
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From: Bel Air USA
Yes, in the good ole days hooking an ohmmeter up to a hot cirucuit would have you buying a new meter because the older meters didn't have the overvoltage protection that the newer ones have.
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Joined: Jan 2008
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On mine theres a connector where a second wire branches off and feeds power to what looks like a vaacum switch for the emissions system. The switch is located on the right fender next to the starter relay. what is this thing called ,what does it do??
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YES, I'm serious( photos of this switch)
A picture is worth a thousand words
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
YES, I'm serious( photos of this switch)
A picture is worth a thousand words
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From: alaska
scroll down top the jodyhutch post in this forum. get rid of the previous owners mess and run new wires , per that wiring diagram , i did the same and it works great, and took less time than chasing someone elses mistakes ,
EDIT:wouldnt it be easier for him to run new wires and bypass the previous owners mess , scroll down to jodyhutches post in this forum and check out the wire diagram that franklyn2 posted , i did mine that way and it works great, thank you again, franklyn2,. btw that switch on my 78 is mounted on the valve cover . i cut the wires to it ,plugged the vacum lines and didnt affect the choke or the alternator or the volt. reg. at all.
good luck,bob
good luck,bob
EDIT:wouldnt it be easier for him to run new wires and bypass the previous owners mess , scroll down to jodyhutches post in this forum and check out the wire diagram that franklyn2 posted , i did mine that way and it works great, thank you again, franklyn2,. btw that switch on my 78 is mounted on the valve cover . i cut the wires to it ,plugged the vacum lines and didnt affect the choke or the alternator or the volt. reg. at all.
good luck,bob
good luck,bob
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Just got back from grocery shopping did'nt want anyone to think i was'nt paying attention. cause i'm all ears.
Checked out the diagram thanks but what about the fusible links?
GETTING BACK to checking alt output.
Is this correct?
1) hook all components up including reg plug.
2) start engine
3) put meter on d/c voltage.
4). connect pos. meter lead to field screw on back of alt
5) hook neg to a good ground source.6 record voltage . Since its to late to do that now lets say it reads batt. voltage 12.6v and i know both the alt and the reg tested good before i left the store?
It seems like theres an open ,in the series,but i've tested all wires by applying power to them and the test light lights up. Could the light ,light up but wire still be bad.
Checked out the diagram thanks but what about the fusible links?
GETTING BACK to checking alt output.
Is this correct?
1) hook all components up including reg plug.
2) start engine
3) put meter on d/c voltage.
4). connect pos. meter lead to field screw on back of alt
5) hook neg to a good ground source.6 record voltage . Since its to late to do that now lets say it reads batt. voltage 12.6v and i know both the alt and the reg tested good before i left the store?
It seems like theres an open ,in the series,but i've tested all wires by applying power to them and the test light lights up. Could the light ,light up but wire still be bad.
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Freshman User
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How about this. Can a fusable link be bad and not be burned in two? Cause the original reg was bad when tested and I've never gotten a charge outta the new components since that happened. I figured the reg was old and wore out,maybe it took somthing with it. When a reg goes up does it usually burn out the link that protects the alt?
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From: alaska
i think you are over analizing it ,youve stated that the previous owner left it a mess , the obviouse fix would be to clean the slate and start over , that diagram is extremely simple , good luck,bob
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I agree with you .But where does the fusable link go that protects the alt? On my truck theres two one looks like it goes to the pos side of starter relay its a red one. The other is an orange looking color, one end looks like it goes to the neg.term of relay and the other dissappears into the wad of tape containing the three reg. wires. I know this seems like overkill but I've been at it for the last ten days> whoever said they like these electrical problems cause they're fun and challenging, can have em...