SteveBrady

is the regulator on the PCm accessible? When it goes...just rip it out or
bypass it and go with a REAL alternator!?

Regulators usually need a few volts more than what they are regulating to.
(12V regulator needs 14-15volts input). So, if you want to hack your 'real'
alt and put in a higher regulator, then the computers' regulator would still
regulate and it should still work!


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:41EBF2DA.A3739C34@sympatico.ca...
> He has a newer Jeep, they don't have 'real' alternators like the older
> ones.
>
> If he uses a real alternator, then he will have a check engine light
> which will fail him on emissions.
>
> He only has a generator of sorts with no voltage regulator in it. The
> regulator is now in the computer so if you want a 'new' voltage
> regulator be prepared to fork out a couple grand. A used one is between
> $250.00 and $500.00 from what I have heard.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jasonp wrote:
>>
>> in three months I've had zero issues with my $90CAD alternator....no
>> lights
>> no weird voltage, nothing....im happy so far
>>
>> "Old Crow" <walliscrow@yahoo.com> wrote in message
>> news:uk4nu0t5ri67ddc5cg7rv71pqe18d8hede@4ax.com...
>> > On Sun, 16 Jan 2005 16:31:43 GMT, RoyJ <spamless@microsoft.net> wrote:
>> >
>> > >Going price for a rebuilt Delco alternator is $80 or so around here.
>> > >
>> >
>> > Yeah, for a Delco. But then I'd have the damned Check Engine light on
>> > all the time. DC opted for a NipponDenso alt, with the regulator in
>> > the PCM on my Jeep.
>> > Them damn little Japanese alternators are more expensive than a good
>> > ol' Delco.
>> >
>> > --
>> > Old Crow
>> > '82 Shovelhead FLTC 92" 'Pearl'
>> > '95 Jeep Wrangler YJ
>> > TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Mike Romain

Replacing the generator part isn't the issue, it's when the PCM
regulator toasts...

Mike

SteveBrady wrote:
>
> is the regulator on the PCm accessible? When it goes...just rip it out or
> bypass it and go with a REAL alternator!?
>
> Regulators usually need a few volts more than what they are regulating to.
> (12V regulator needs 14-15volts input). So, if you want to hack your 'real'
> alt and put in a higher regulator, then the computers' regulator would still
> regulate and it should still work!
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:41EBF2DA.A3739C34@sympatico.ca...
> > He has a newer Jeep, they don't have 'real' alternators like the older
> > ones.
> >
> > If he uses a real alternator, then he will have a check engine light
> > which will fail him on emissions.
> >
> > He only has a generator of sorts with no voltage regulator in it. The
> > regulator is now in the computer so if you want a 'new' voltage
> > regulator be prepared to fork out a couple grand. A used one is between
> > $250.00 and $500.00 from what I have heard.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Jasonp wrote:
> >>
> >> in three months I've had zero issues with my $90CAD alternator....no
> >> lights
> >> no weird voltage, nothing....im happy so far
> >>
> >> "Old Crow" <walliscrow@yahoo.com> wrote in message
> >> news:uk4nu0t5ri67ddc5cg7rv71pqe18d8hede@4ax.com...
> >> > On Sun, 16 Jan 2005 16:31:43 GMT, RoyJ <spamless@microsoft.net> wrote:
> >> >
> >> > >Going price for a rebuilt Delco alternator is $80 or so around here.
> >> > >
> >> >
> >> > Yeah, for a Delco. But then I'd have the damned Check Engine light on
> >> > all the time. DC opted for a NipponDenso alt, with the regulator in
> >> > the PCM on my Jeep.
> >> > Them damn little Japanese alternators are more expensive than a good
> >> > ol' Delco.
> >> >
> >> > --
> >> > Old Crow
> >> > '82 Shovelhead FLTC 92" 'Pearl'
> >> > '95 Jeep Wrangler YJ
> >> > TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Mike Romain

Replacing the generator part isn't the issue, it's when the PCM
regulator toasts...

Mike

SteveBrady wrote:
>
> is the regulator on the PCm accessible? When it goes...just rip it out or
> bypass it and go with a REAL alternator!?
>
> Regulators usually need a few volts more than what they are regulating to.
> (12V regulator needs 14-15volts input). So, if you want to hack your 'real'
> alt and put in a higher regulator, then the computers' regulator would still
> regulate and it should still work!
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:41EBF2DA.A3739C34@sympatico.ca...
> > He has a newer Jeep, they don't have 'real' alternators like the older
> > ones.
> >
> > If he uses a real alternator, then he will have a check engine light
> > which will fail him on emissions.
> >
> > He only has a generator of sorts with no voltage regulator in it. The
> > regulator is now in the computer so if you want a 'new' voltage
> > regulator be prepared to fork out a couple grand. A used one is between
> > $250.00 and $500.00 from what I have heard.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Jasonp wrote:
> >>
> >> in three months I've had zero issues with my $90CAD alternator....no
> >> lights
> >> no weird voltage, nothing....im happy so far
> >>
> >> "Old Crow" <walliscrow@yahoo.com> wrote in message
> >> news:uk4nu0t5ri67ddc5cg7rv71pqe18d8hede@4ax.com...
> >> > On Sun, 16 Jan 2005 16:31:43 GMT, RoyJ <spamless@microsoft.net> wrote:
> >> >
> >> > >Going price for a rebuilt Delco alternator is $80 or so around here.
> >> > >
> >> >
> >> > Yeah, for a Delco. But then I'd have the damned Check Engine light on
> >> > all the time. DC opted for a NipponDenso alt, with the regulator in
> >> > the PCM on my Jeep.
> >> > Them damn little Japanese alternators are more expensive than a good
> >> > ol' Delco.
> >> >
> >> > --
> >> > Old Crow
> >> > '82 Shovelhead FLTC 92" 'Pearl'
> >> > '95 Jeep Wrangler YJ
> >> > TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Mike Romain

Replacing the generator part isn't the issue, it's when the PCM
regulator toasts...

Mike

SteveBrady wrote:
>
> is the regulator on the PCm accessible? When it goes...just rip it out or
> bypass it and go with a REAL alternator!?
>
> Regulators usually need a few volts more than what they are regulating to.
> (12V regulator needs 14-15volts input). So, if you want to hack your 'real'
> alt and put in a higher regulator, then the computers' regulator would still
> regulate and it should still work!
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:41EBF2DA.A3739C34@sympatico.ca...
> > He has a newer Jeep, they don't have 'real' alternators like the older
> > ones.
> >
> > If he uses a real alternator, then he will have a check engine light
> > which will fail him on emissions.
> >
> > He only has a generator of sorts with no voltage regulator in it. The
> > regulator is now in the computer so if you want a 'new' voltage
> > regulator be prepared to fork out a couple grand. A used one is between
> > $250.00 and $500.00 from what I have heard.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Jasonp wrote:
> >>
> >> in three months I've had zero issues with my $90CAD alternator....no
> >> lights
> >> no weird voltage, nothing....im happy so far
> >>
> >> "Old Crow" <walliscrow@yahoo.com> wrote in message
> >> news:uk4nu0t5ri67ddc5cg7rv71pqe18d8hede@4ax.com...
> >> > On Sun, 16 Jan 2005 16:31:43 GMT, RoyJ <spamless@microsoft.net> wrote:
> >> >
> >> > >Going price for a rebuilt Delco alternator is $80 or so around here.
> >> > >
> >> >
> >> > Yeah, for a Delco. But then I'd have the damned Check Engine light on
> >> > all the time. DC opted for a NipponDenso alt, with the regulator in
> >> > the PCM on my Jeep.
> >> > Them damn little Japanese alternators are more expensive than a good
> >> > ol' Delco.
> >> >
> >> > --
> >> > Old Crow
> >> > '82 Shovelhead FLTC 92" 'Pearl'
> >> > '95 Jeep Wrangler YJ
> >> > TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Old Crow

On Mon, 17 Jan 2005 17:25:10 -0500, "SteveBrady" <steve.brady@(remove
this)rogers.com> wrote:

>is the regulator on the PCm accessible? When it goes...just rip it out or
>bypass it and go with a REAL alternator!?
>
>Regulators usually need a few volts more than what they are regulating to.
>(12V regulator needs 14-15volts input). So, if you want to hack your 'real'
>alt and put in a higher regulator, then the computers' regulator would still
>regulate and it should still work!

The PCM provides as varying ground to the field circuit of the alt. to
control voltage output. I assume that the PCM looks for varying
output as it controls the ground. If it doesn't see the voltage vary,
it'll turn on the light.
I'm not adverse to ripping the thing out and going with a Delco
one-wire, but then, if some emissions thing went wrong, I'd have no
warning of it.
At $59 a pop, I can afford to rebuild the alt every 185,000 miles or
so.

--
Old Crow
'82 Shovelhead FLTC 92" 'Pearl'
'95 Jeep Wrangler YJ
TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Old Crow

On Mon, 17 Jan 2005 17:25:10 -0500, "SteveBrady" <steve.brady@(remove
this)rogers.com> wrote:

>is the regulator on the PCm accessible? When it goes...just rip it out or
>bypass it and go with a REAL alternator!?
>
>Regulators usually need a few volts more than what they are regulating to.
>(12V regulator needs 14-15volts input). So, if you want to hack your 'real'
>alt and put in a higher regulator, then the computers' regulator would still
>regulate and it should still work!

The PCM provides as varying ground to the field circuit of the alt. to
control voltage output. I assume that the PCM looks for varying
output as it controls the ground. If it doesn't see the voltage vary,
it'll turn on the light.
I'm not adverse to ripping the thing out and going with a Delco
one-wire, but then, if some emissions thing went wrong, I'd have no
warning of it.
At $59 a pop, I can afford to rebuild the alt every 185,000 miles or
so.

--
Old Crow
'82 Shovelhead FLTC 92" 'Pearl'
'95 Jeep Wrangler YJ
TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2

Old Crow

On Mon, 17 Jan 2005 17:25:10 -0500, "SteveBrady" <steve.brady@(remove
this)rogers.com> wrote:

>is the regulator on the PCm accessible? When it goes...just rip it out or
>bypass it and go with a REAL alternator!?
>
>Regulators usually need a few volts more than what they are regulating to.
>(12V regulator needs 14-15volts input). So, if you want to hack your 'real'
>alt and put in a higher regulator, then the computers' regulator would still
>regulate and it should still work!

The PCM provides as varying ground to the field circuit of the alt. to
control voltage output. I assume that the PCM looks for varying
output as it controls the ground. If it doesn't see the voltage vary,
it'll turn on the light.
I'm not adverse to ripping the thing out and going with a Delco
one-wire, but then, if some emissions thing went wrong, I'd have no
warning of it.
At $59 a pop, I can afford to rebuild the alt every 185,000 miles or
so.

--
Old Crow
'82 Shovelhead FLTC 92" 'Pearl'
'95 Jeep Wrangler YJ
TOMKAT, BS#133, SENS, MAMBM, DOF#51, SPUNGER#2