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Fluctuating gauges?

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Old Aug 10, 2009 | 11:50 PM
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ken selvy's Avatar
ken selvy
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Fluctuating gauges?

Does anyone know why my gauges fluctuate sometimes , not idiot lights , sometimes they go to the right of normal and times they run normal . New backing plate and circuit board is clean , sensors are new , mostly the temp and oil gauge does this , the voltage gauge never moves at all . Is it the little voltage thing that is connected to the board be going out .
 
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Old Aug 11, 2009 | 02:55 AM
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Guages have to move to tell you how its working, the temp should be low when you start it and the oil should be higher when first started.
 
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Old Aug 11, 2009 | 03:09 AM
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Originally Posted by ken selvy
Does anyone know why my gauges fluctuate sometimes , not idiot lights , sometimes they go to the right of normal and times they run normal . New backing plate and circuit board is clean , sensors are new , mostly the temp and oil gauge does this , the voltage gauge never moves at all . Is it the little voltage thing that is connected to the board be going out .
Is this what's occuring? The gauges seem to have a mind of their own, as the needles are swinging back and forth all by themselves, doing the Hula, so to speak.

This is a common problem and is the sign of a failing ICVR. Usually this "dance" affects the temperature, oil and fuel gauges.

D1AZ10804A .. ICVR = Instrument Cluster Voltage Regulator (Motorcraft GR513) / Available from Ford and autoparts stores.

Fits: 1971/79 F100/350 & 1978/79 Bronco.

If you plan on buying one, make sure to take the old ICVR with you to match it up.

There are...at least 10 other types, but only this one is correct.
 
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Old Aug 11, 2009 | 10:11 AM
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Yes that is what is happening , ok thanks will replace .
 
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Old Aug 11, 2009 | 11:23 AM
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Mine were doing that to, as with the door buzzer going off when the lights turned on, mine was a ground under/behind the dash.
 
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Old Aug 11, 2009 | 01:50 PM
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Originally Posted by ken selvy
the voltage gauge never moves at all . .
Didn't you post this once before? the "ammeter" gauge rarely moves at all and when it does it's barely even noticable, there's actually a TSB regarding this very issue.
 
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Old Aug 11, 2009 | 03:06 PM
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Yes, this dude posted this question twice.

Josh
 
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Old Aug 16, 2009 | 11:55 PM
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No this dude didn't post twice , because I never had this problem , but I switched out the voltage dash regulator and it works great now , so thanks for the help guys .
 
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Old Jan 14, 2010 | 08:59 PM
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Bumping an old thread because I am about to change my instrument cluster, instrument cluster backing plate and instrument voltage regulator. My fuel and temp gauges go way past pegged out and the needle is missing on my speedometer, so I am just putting another cluster in with a new back and figure I would put another instrument voltage regulator in there while I'm at it.

Has anyone ever ordered from Midland Automotive Products? They have the instrument voltage regulator for $16 plus $1.60 shipping. I found them by a google search of D1AZ10804A. They say that the minimum credit card order is $20 so if they contact me, I guess I will add a $4 catalog to the order.

If they go ahead and ship it, I will confirm. Everywhere that I priced this part, it is $40 to $50. I figured I would give it a try for $20.

Anybody have good experience with them?
 
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Old Jan 14, 2010 | 09:46 PM
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If they are all doing it, it may be a power/grounding issue. These are all electric gauges
 
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Old Jan 14, 2010 | 11:08 PM
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Originally Posted by terceslil
I am about to change my instrument cluster, instrument cluster backing plate and instrument voltage regulator. My fuel and temp gauges go way past pegged out and the needle is missing on my speedometer, so I am just putting another cluster in with a new back and figure I would put another instrument voltage regulator in there while I'm at it.
CAVEAT EMPTOR:

The cluster backs used on 1975/79 F100/350's; 1978/79 Bronco's and 1975/80 Econolines were made from a composition material that can turn to DUST before your very eyes!

In 1981, Ford replaced these fracatta cluster backs with hard plastic cluster backs and installed them in 1981 and later Econolines. Dealers installed these in 10's of 1000's of the earlier vehicles.

E1PZ10848A .. Cluster Back / Use with Oil & Amp Gauges / Obsolete

Fits: 1975/91 Econoline / 1975/79 F100/350 & 1978/79 Bronco.
-------------------------------------------------------------
E1PZ10848B .. Cluster Back / Use with Oil & Amp Warning (Idiot) Lights / Obsolete

Fits: 1975/86 Econoline / 1975/79 F100/350 & 1978/79 Bronco.

Dennis Carpenter (704-786-8139) in Concord NC has 100's of each, as he bought Ford's entire stock several years ago.

You can also find them in 1981 and later Econolines.
 
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Old Jan 14, 2010 | 11:16 PM
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terceslil
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I know the backs are just terrible and I suspect it to be the cause of my gauge woes. Is the brake light considered an idiot light? I ordered the one with the warning lights. This is my cluster. Did I order the correct one?

 
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Old Jan 14, 2010 | 11:25 PM
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OIL & AMP Warning (idiot) lights were standard equipment.

OIL & AMP gauges were optional, Your truck has these gauges.

If you had warning lights, you would have lenses only where the oil/amp guages are installed.

The brake light, high beam indicator light, seat belt warning light (and economy light...if so equipped) are not considered idiot lights.
 
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Old Jan 14, 2010 | 11:35 PM
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So I ordered the wrong part. I do not need the warning light cluster backing plate. Off to shoot the Bronco Graveyard an email. Thanks, NumberDummy
 
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