While I'm changing the radiator, 2 year old antifreeze, water pump, installing the Mercedes Benz fan clutch, and making the fan shroud into a 2 piece. Good time to check out why the radiator low coolant warning light isn't working. I cleaned the sensor in the radiator. That didn't help. Anyone know how to test the circuit board out? Bob Dunahugh 78 Royale
Testing the original GMC low coolent level warning light system.
- Thread starter Bob Dunahugh
- Start date
Bob, in manual x-7525, page 12-17, figure 23, there is a diagnosis flow
chart for the coolant level circuit. That is about all there is in the
literature. Be sure that your new aluminum radiator is grounded back to the
engine block, as the hoses are insulators. If your probe is not grounded
back to the block, you won't have a complete circuit. That's my best guess,
anyway.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
While I'm changing the radiator, 2 year old antifreeze, water pump,
installing the Mercedes Benz fan clutch, and making the fan shroud into a 2
piece. Good time to check out why the radiator low coolant warning light
isn't working. I cleaned the sensor in the radiator. That didn't help.
Anyone know how to test the circuit board out? Bob Dunahugh 78 Royale
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chart for the coolant level circuit. That is about all there is in the
literature. Be sure that your new aluminum radiator is grounded back to the
engine block, as the hoses are insulators. If your probe is not grounded
back to the block, you won't have a complete circuit. That's my best guess,
anyway.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
While I'm changing the radiator, 2 year old antifreeze, water pump,
installing the Mercedes Benz fan clutch, and making the fan shroud into a 2
piece. Good time to check out why the radiator low coolant warning light
isn't working. I cleaned the sensor in the radiator. That didn't help.
Anyone know how to test the circuit board out? Bob Dunahugh 78 Royale
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What "other than glycol" ?
Jim Hupy
Salem, Or
78 GMC ROYALE 403
> Related topic: Will the sesor work properly with other than glycol
> antifreeze?
> --
> 76 Glenbrook
>
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Jim Hupy
Salem, Or
78 GMC ROYALE 403
> Related topic: Will the sesor work properly with other than glycol
> antifreeze?
> --
> 76 Glenbrook
>
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The work with just water if you are trying to test it. But what do you intend to put in “other than glycol”?
Emery Stora
77 Kingsley
Frederick, CO
>
> Related topic: Will the sesor work properly with other than glycol antifreeze?
> --
> 76 Glenbrook
>
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Emery Stora
77 Kingsley
Frederick, CO
>
> Related topic: Will the sesor work properly with other than glycol antifreeze?
> --
> 76 Glenbrook
>
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The sensor should work with any conductive fluid.
J.R. Wright
GMC GreatLakerTech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan
>
> Related topic: Will the sensor work properly with other than glycol antifreeze?
> --
> 76 Glenbrook
>
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J.R. Wright
GMC GreatLakerTech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan
>
> Related topic: Will the sensor work properly with other than glycol antifreeze?
> --
> 76 Glenbrook
>
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The probe should work with any conductive fluid.
J.R. Wright
GMC Great Laker
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 30' Stretch
75 Avion (Under going Frame up Restoration)
> The work with just water if you are trying to test it. But what do you
> intend to put in “other than glycol”?
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
> > On Mar 11, 2018, at 1:52 PM, Chris Tyler
> >
> > Related topic: Will the sesor work properly with other than glycol
> antifreeze?
> > --
> > 76 Glenbrook
> >
> > _______________________________________________
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>
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J.R. Wright
GMC Great Laker
GMC Eastern States
GMCMHI
TZE Zone Restorations
78 Buskirk Custom 30' Stretch
75 Avion (Under going Frame up Restoration)
> The work with just water if you are trying to test it. But what do you
> intend to put in “other than glycol”?
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
>
> > On Mar 11, 2018, at 1:52 PM, Chris Tyler
> >
> > Related topic: Will the sesor work properly with other than glycol
> antifreeze?
> > --
> > 76 Glenbrook
> >
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Jim Hupy
Salem, Or
My understanding is the sensor is for coolant percentage and not level. Is this correct?
On similar vintage vehicles I found the coolant sensor no longer worked when I ran Xeorex AF years ago [not sure of the formulation of that] and also
when using straight water plus "water wetter" on HP vehicles here in FL
[BTW Ive seen it disparaged here but found nothing cooled better in testing. It provides no anti freeze effect but works here]
I wouldnt run that combo in the GMC for several reasons. However I ask because Im not sure If Dexcool or envirocool or any of the other formulations
out there would effect it.
--
76 Glenbrook
Salem, Or
My understanding is the sensor is for coolant percentage and not level. Is this correct?
On similar vintage vehicles I found the coolant sensor no longer worked when I ran Xeorex AF years ago [not sure of the formulation of that] and also
when using straight water plus "water wetter" on HP vehicles here in FL
[BTW Ive seen it disparaged here but found nothing cooled better in testing. It provides no anti freeze effect but works here]
I wouldnt run that combo in the GMC for several reasons. However I ask because Im not sure If Dexcool or envirocool or any of the other formulations
out there would effect it.
--
76 Glenbrook
NO!
The sensor is only for coolant level. It will not detect the percentage of glycol. It is only a probe that lights a bulb when the liquid level falls below the position of the probe. It doesn’t care what the liquid is.
Emery Stora
77 Kingsley
Frederick, CO
>
> Jim Hupy
> Salem, Or
>
> My understanding is the sensor is for coolant percentage and not level. Is this correct?
>
> On similar vintage vehicles I found the coolant sensor no longer worked when I ran Xeorex AF years ago [not sure of the formulation of that] and also
> when using straight water plus "water wetter" on HP vehicles here in FL
> [BTW Ive seen it disparaged here but found nothing cooled better in testing. It provides no anti freeze effect but works here]
>
> I wouldnt run that combo in the GMC for several reasons. However I ask because Im not sure If Dexcool or envirocool or any of the other formulations
> out there would effect it.
>
>
> --
> 76 Glenbrook
>
> _______________________________________________
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> Unsubscribe or Change List Options:
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The sensor is only for coolant level. It will not detect the percentage of glycol. It is only a probe that lights a bulb when the liquid level falls below the position of the probe. It doesn’t care what the liquid is.
Emery Stora
77 Kingsley
Frederick, CO
>
> Jim Hupy
> Salem, Or
>
> My understanding is the sensor is for coolant percentage and not level. Is this correct?
>
> On similar vintage vehicles I found the coolant sensor no longer worked when I ran Xeorex AF years ago [not sure of the formulation of that] and also
> when using straight water plus "water wetter" on HP vehicles here in FL
> [BTW Ive seen it disparaged here but found nothing cooled better in testing. It provides no anti freeze effect but works here]
>
> I wouldnt run that combo in the GMC for several reasons. However I ask because Im not sure If Dexcool or envirocool or any of the other formulations
> out there would effect it.
>
>
> --
> 76 Glenbrook
>
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If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
Glycol mixed 50-50 with distilled water in hard water areas like a lot of
the USA. I would not stray very far from those recommendations. Listen to
Emery. He spent a good portion of his working career as a Chemical Engineer
working for a HUGE manufacturer of anti-freeze and like products. "Wetter
water? " probably not a great idea. But like everything else, it IS your
money, spend it how you see fit.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
> Forgot to say DO NOT use Dexcool in the GMC engine.
>
> Emery Stora
>
>
> > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> >
> >
>
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Glycol mixed 50-50 with distilled water in hard water areas like a lot of
the USA. I would not stray very far from those recommendations. Listen to
Emery. He spent a good portion of his working career as a Chemical Engineer
working for a HUGE manufacturer of anti-freeze and like products. "Wetter
water? " probably not a great idea. But like everything else, it IS your
money, spend it how you see fit.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
> Forgot to say DO NOT use Dexcool in the GMC engine.
>
> Emery Stora
>
>
> > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> >
> >
>
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>
Jim,
RTFM. Read The Fing Manual?
Sully
77 eleganza 2
Bellevue.
> If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
> Glycol mixed 50-50 with distilled water in hard water areas like a lot of
> the USA. I would not stray very far from those recommendations. Listen to
> Emery. He spent a good portion of his working career as a Chemical Engineer
> working for a HUGE manufacturer of anti-freeze and like products. "Wetter
> water? " probably not a great idea. But like everything else, it IS your
> money, spend it how you see fit.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
>
> > Forgot to say DO NOT use Dexcool in the GMC engine.
> >
> > Emery Stora
> >
> >
> > > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> > >
> > >
> >
> > _______________________________________________
> > GMCnet mailing list
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>
RTFM. Read The Fing Manual?
Sully
77 eleganza 2
Bellevue.
> If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
> Glycol mixed 50-50 with distilled water in hard water areas like a lot of
> the USA. I would not stray very far from those recommendations. Listen to
> Emery. He spent a good portion of his working career as a Chemical Engineer
> working for a HUGE manufacturer of anti-freeze and like products. "Wetter
> water? " probably not a great idea. But like everything else, it IS your
> money, spend it how you see fit.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
>
> > Forgot to say DO NOT use Dexcool in the GMC engine.
> >
> > Emery Stora
> >
> >
> > > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> > >
> > >
> >
> > _______________________________________________
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Yup. Although the adjective changes, depending upon sensitivity of parties
involved.
Jim Hupy
Jim,
RTFM. Read The Fing Manual?
Sully
77 eleganza 2
Bellevue.
> If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
> Glycol mixed 50-50 with distilled water in hard water areas like a lot of
> the USA. I would not stray very far from those recommendations. Listen to
> Emery. He spent a good portion of his working career as a Chemical
Engineer
> working for a HUGE manufacturer of anti-freeze and like products. "Wetter
> water? " probably not a great idea. But like everything else, it IS your
> money, spend it how you see fit.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
>
> > Forgot to say DO NOT use Dexcool in the GMC engine.
> >
> > Emery Stora
> >
> >
> > > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> > >
> > >
> >
> > _______________________________________________
> > GMCnet mailing list
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involved.
Jim Hupy
Jim,
RTFM. Read The Fing Manual?
Sully
77 eleganza 2
Bellevue.
> If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
> Glycol mixed 50-50 with distilled water in hard water areas like a lot of
> the USA. I would not stray very far from those recommendations. Listen to
> Emery. He spent a good portion of his working career as a Chemical
Engineer
> working for a HUGE manufacturer of anti-freeze and like products. "Wetter
> water? " probably not a great idea. But like everything else, it IS your
> money, spend it how you see fit.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
>
> > Forgot to say DO NOT use Dexcool in the GMC engine.
> >
> > Emery Stora
> >
> >
> > > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> > >
> > >
> >
> > _______________________________________________
> > GMCnet mailing list
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> Yup. Although the adjective changes, depending upon sensitivity of parties
> involved.
> Jim Hupy
>
>
> Jim,
>
> RTFM. Read The Fing Manual?
>
> Sully
> 77 eleganza 2
> Bellevue.
>
>
> > If you RTFM, you will find the appropriate coolant for the GMC. Ethelyne
> > Glycol mixed 50-50 with distilled water in hard water areas like a lot
> of
> > the USA. I would not stray very far from those recommendations. Listen to
> > Emery. He spent a good portion of his working career as a Chemical
> Engineer
> > working for a HUGE manufacturer of anti-freeze and like products. "Wetter
> > water? " probably not a great idea. But like everything else, it IS your
> > money, spend it how you see fit.
> > Jim Hupy
> > Salem, Or
> > 78 GMC ROYALE 403
> >
> >
> > > Forgot to say DO NOT use Dexcool in the GMC engine.
> > >
> > > Emery Stora
> > >
> > >
> > > > On Mar 14, 2018, at 6:39 AM, Chris Tyler
> > > >
> > > >
> > >
> > > _______________________________________________
> > > GMCnet mailing list
> > > Unsubscribe or Change List Options:
> > > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> > >
> > _______________________________________________
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