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External
Since: Jan 19, 2005
Posts: 140
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(Msg. 1) Posted: Fri Jan 11, 2008 9:27 am
Post subject: '66 overcharging
Archived from groups: rec>autos>makers>ford>mustang (more info?)
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I'm ready to drive my just completed '66 coupe restomod however I can't
because the system is overcharging. When I start the car the ammeter pegs
and the voltage is pushing 16 and goes higher when the engine is revved up.
Needless to say I don't run it very long fearing it may start blowing bulbs
and my MSD ignition system. The car has all new stock wiring harnesses. I
tried replacing suspected new parts with the old parts that came off the car
and were working fine: alternator, voltage regulator, and even the battery
to no avail. All the grounds are present. My guess is there's an unseen
problem with the wiring. I already checked the contacts at the voltage
regulator and the alternator loom and they are hooked up correctly. If by
chance a wire got pinched, which one would cause this condition? Any ideas
where else I should look? perhaps I got a faulty harness. TIA |
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External
Since: Dec 22, 2007
Posts: 99
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(Msg. 2) Posted: Fri Jan 11, 2008 12:53 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Mark C. wrote:
> I'm ready to drive my just completed '66 coupe restomod however I can't
> because the system is overcharging. When I start the car the ammeter pegs
> and the voltage is pushing 16 and goes higher when the engine is revved up.
> Needless to say I don't run it very long fearing it may start blowing bulbs
> and my MSD ignition system. The car has all new stock wiring harnesses. I
> tried replacing suspected new parts with the old parts that came off the car
> and were working fine: alternator, voltage regulator, and even the battery
> to no avail. All the grounds are present. My guess is there's an unseen
> problem with the wiring. I already checked the contacts at the voltage
> regulator and the alternator loom and they are hooked up correctly. If by
> chance a wire got pinched, which one would cause this condition? Any ideas
> where else I should look? perhaps I got a faulty harness. TIA
>
>
the only time I have seen this happen is when the regulator is bad.
Try to isolate the charging system, leaving no other electricals
connected. You have the stock in-dash volt meter thingy instead of an
alt light? Sure that is connected correctly? That's about the only thing
outside of the alt itself and the reg that you need to make the charging
system work.
Disconnect all aftermarket gauges if you have any. Leave it bone stock,
making sure the basics work.
I have a 66 too but unfortunately it's too far away to go take a lok at
how things are hooked up.
Jan |
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External
Since: Dec 22, 2007
Posts: 6
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(Msg. 3) Posted: Fri Jan 11, 2008 3:46 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Jan Andersson" <bugfuel RemoveThis @REMOVErocketmail.com> wrote in message
news:5upoooF1ie67hU1@mid.individual.net...
> Mark C. wrote:
>> I'm ready to drive my just completed '66 coupe restomod however I can't
>> because the system is overcharging. When I start the car the ammeter pegs
>> and the voltage is pushing 16 and goes higher when the engine is revved
>> up. Needless to say I don't run it very long fearing it may start blowing
>> bulbs and my MSD ignition system. The car has all new stock wiring
>> harnesses. I tried replacing suspected new parts with the old parts that
>> came off the car and were working fine: alternator, voltage regulator,
>> and even the battery to no avail. All the grounds are present. My guess
>> is there's an unseen problem with the wiring. I already checked the
>> contacts at the voltage regulator and the alternator loom and they are
>> hooked up correctly. If by chance a wire got pinched, which one would
>> cause this condition? Any ideas where else I should look? perhaps I got a
>> faulty harness. TIA
>
>
> the only time I have seen this happen is when the regulator is bad.
>
> Try to isolate the charging system, leaving no other electricals
> connected. You have the stock in-dash volt meter thingy instead of an alt
> light? Sure that is connected correctly? That's about the only thing
> outside of the alt itself and the reg that you need to make the charging
> system work.
> Disconnect all aftermarket gauges if you have any. Leave it bone stock,
> making sure the basics work.
>
> I have a 66 too but unfortunately it's too far away to go take a lok at
> how things are hooked up.
>
> Jan
its the voltage regulator,
the older cars had generators, not alternators, but both had voltage
regulators. >> Stay informed about: '66 overcharging |
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External
Since: Dec 22, 2007
Posts: 99
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(Msg. 4) Posted: Fri Jan 11, 2008 5:16 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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noman wrote:
> "Jan Andersson" <bugfuel.RemoveThis@REMOVErocketmail.com> wrote in message
> news:5upoooF1ie67hU1@mid.individual.net...
>> Mark C. wrote:
>>> I'm ready to drive my just completed '66 coupe restomod however I can't
>>> because the system is overcharging. When I start the car the ammeter pegs
>>> and the voltage is pushing 16 and goes higher when the engine is revved
>>> up. Needless to say I don't run it very long fearing it may start blowing
>>> bulbs and my MSD ignition system. The car has all new stock wiring
>>> harnesses. I tried replacing suspected new parts with the old parts that
>>> came off the car and were working fine: alternator, voltage regulator,
>>> and even the battery to no avail. All the grounds are present. My guess
>>> is there's an unseen problem with the wiring. I already checked the
>>> contacts at the voltage regulator and the alternator loom and they are
>>> hooked up correctly. If by chance a wire got pinched, which one would
>>> cause this condition? Any ideas where else I should look? perhaps I got a
>>> faulty harness. TIA
>>
>> the only time I have seen this happen is when the regulator is bad.
>>
>> Try to isolate the charging system, leaving no other electricals
>> connected. You have the stock in-dash volt meter thingy instead of an alt
>> light? Sure that is connected correctly? That's about the only thing
>> outside of the alt itself and the reg that you need to make the charging
>> system work.
>> Disconnect all aftermarket gauges if you have any. Leave it bone stock,
>> making sure the basics work.
>>
>> I have a 66 too but unfortunately it's too far away to go take a lok at
>> how things are hooked up.
>>
>> Jan
>
> its the voltage regulator,
> the older cars had generators, not alternators, but both had voltage
> regulators.
>
>
Oh yea, the regs are different, can't mix and match. >> Stay informed about: '66 overcharging |
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External
Since: Jun 29, 2006
Posts: 4
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(Msg. 5) Posted: Fri Jan 11, 2008 8:57 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Mark C." <mustango656.RemoveThis@comcast.net> wrote in message
news:VpqdnWxJwdCHOhranZ2dnUVZ_tCrnZ2d@comcast.com...
> I'm ready to drive my just completed '66 coupe restomod however I can't
> because the system is overcharging. When I start the car the ammeter pegs
> and the voltage is pushing 16 and goes higher when the engine is revved
> up. Needless to say I don't run it very long fearing it may start blowing
> bulbs and my MSD ignition system. The car has all new stock wiring
> harnesses. I tried replacing suspected new parts with the old parts that
> came off the car and were working fine: alternator, voltage regulator, and
> even the battery to no avail. All the grounds are present. My guess is
> there's an unseen problem with the wiring. I already checked the contacts
> at the voltage regulator and the alternator loom and they are hooked up
> correctly. If by chance a wire got pinched, which one would cause this
> condition? Any ideas where else I should look? perhaps I got a faulty
> harness. TIA
> I would take the voltage regulator in to an auto parts supplier and have
> it bench tested ( may as well as take alternator in as well). Only other
> thing than can cause overcharging condition, that I'm aware of is a short
> circuit in the field and armature wiring between the alternator and
> regulator >> Stay informed about: '66 overcharging |
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External
Since: Oct 16, 2006
Posts: 108
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(Msg. 6) Posted: Fri Jan 11, 2008 9:07 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Fri, 11 Jan 2008 15:46:07 -0600, "noman" <nospam RemoveThis @nospam.com> wrote:
>
>"Jan Andersson" <bugfuel RemoveThis @REMOVErocketmail.com> wrote in message
>news:5upoooF1ie67hU1@mid.individual.net...
>> Mark C. wrote:
>>> I'm ready to drive my just completed '66 coupe restomod however I can't
>>> because the system is overcharging. When I start the car the ammeter pegs
>>> and the voltage is pushing 16 and goes higher when the engine is revved
>>> up. Needless to say I don't run it very long fearing it may start blowing
SNIP
>>
>> I have a 66 too but unfortunately it's too far away to go take a lok at
>> how things are hooked up.
>>
>> Jan
>
>its the voltage regulator,
>the older cars had generators, not alternators, but both had voltage
>regulators.
>
A 66 would have had an alternator. I think the last Mustangs with
generators were the first Mustangs in 64. Both my 65 FBs had
alternators.
What alternator did you put in it? Check the manufacturers online tech
pages or email them.
Sure does sound like the regulator, but, IIRC there was something
about the gauge wiring which could also result in the same symptoms.
Just can't recall what it was I read about that. >> Stay informed about: '66 overcharging |
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External
Since: Sep 02, 2007
Posts: 36
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(Msg. 7) Posted: Fri Jan 11, 2008 11:59 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"noman" <nospam.RemoveThis@nospam.com> wrote in news:4787e38a$0$47116$892e7fe2
@authen.yellow.readfreenews.net:
> the older cars had generators, not alternators, but both had voltage
> regulators.
'66 Mustangs had an alternator. >> Stay informed about: '66 overcharging |
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External
Since: Jan 19, 2005
Posts: 140
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(Msg. 8) Posted: Sat Jan 12, 2008 5:15 pm
Post subject: Re: '66 overcharging [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I wish it were as simple as a bad regulator but if you go back and read my
original post I installed the old regulator, batt & alternator and it did
the same thing. The old parts were working fine but the car is a show ready
restoration so I got new parts for better looks and to upgrade the charging
system with a higher amp alternator, a solid state Motorcraft voltage
regulator and an Optima battery. What I need to know are which wires to
check for continuity, voltage and so on.
"Michael Ashby" <MAshby69.RemoveThis@worldnet.att.net> wrote in message
news:hWThj.414976$kj1.5296@bgtnsc04-news.ops.worldnet.att.net...
>
> "Mark C." <mustango656.RemoveThis@comcast.net> wrote in message
> news:VpqdnWxJwdCHOhranZ2dnUVZ_tCrnZ2d@comcast.com...
>> I'm ready to drive my just completed '66 coupe restomod however I can't
>> because the system is overcharging. When I start the car the ammeter pegs
>> and the voltage is pushing 16 and goes higher when the engine is revved
>> up. Needless to say I don't run it very long fearing it may start blowing
>> bulbs and my MSD ignition system. The car has all new stock wiring
>> harnesses. I tried replacing suspected new parts with the old parts that
>> came off the car and were working fine: alternator, voltage regulator,
>> and even the battery to no avail. All the grounds are present. My guess
>> is there's an unseen problem with the wiring. I already checked the
>> contacts at the voltage regulator and the alternator loom and they are
>> hooked up correctly. If by chance a wire got pinched, which one would
>> cause this condition? Any ideas where else I should look? perhaps I got a
>> faulty harness. TIA
>> I would take the voltage regulator in to an auto parts supplier and have
>> it bench tested ( may as well as take alternator in as well). Only other
>> thing than can cause overcharging condition, that I'm aware of is a short
>> circuit in the field and armature wiring between the alternator and
>> regulator
>
> >> Stay informed about: '66 overcharging |
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