constant voltage regulator
Cargo Master
Joined: Sep 2007
Posts: 2,470
Likes: 535
From: Chandler, AZ
You can replace the bimetallic switcher (not constant voltage at all) with a cheap voltage regulator like a LM317. You would have to build the circuit although its only a few parts. The gauge system draws quite a bit of current.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
How do you know it's bad?
Maybe you know this already, If measuring with a digital voltmeter it's going to look wonky. It's pretty choppy, since it's an averaging unit. It makes and breaks 12 volts a couple times a second mechanically, consequently "dropping" the average voltage the dash gauges see, they respond sluggish by design so everything works fine. They do go bad, but are often replaced unneccesarily. Try measuring with analog type meter, it's probably working fine.
Maybe you know this already, If measuring with a digital voltmeter it's going to look wonky. It's pretty choppy, since it's an averaging unit. It makes and breaks 12 volts a couple times a second mechanically, consequently "dropping" the average voltage the dash gauges see, they respond sluggish by design so everything works fine. They do go bad, but are often replaced unneccesarily. Try measuring with analog type meter, it's probably working fine.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
ICVR: Instrument Cluster (Constant) Voltage Regulator
1967/69 use a different ICVR than 1970. 1971/72 is different again.
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Rabbit-Hole Researcher
Joined: Feb 2004
Posts: 466
Likes: 6
From: Middle of Ohio
It would be a lot easier to buy one, but if you have hobby electronics skills, you can make one easily. I used junk-box items. If you make your own, you can add a transient protector across the leads, use better caps, and a better heat-sink.
Here is a picture of mine.
https://www.ford-trucks.com/forums/5...regulator.html
Still working.
Here is a picture of mine.
https://www.ford-trucks.com/forums/5...regulator.html
Still working.
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Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
67/69 F100/750 ICVR was part number C6DZ10804A.
Nos Parts Source *Fo
913.220.5746
Miller Obsolete Parts
Part Number:C6DZ-10804-A
Seller:Miller Obsolete Parts -
Description:REGULATOR GR-510
Phone (607) 722-5371
McDonald Obsolete Parts
Part Number:C6DZ-10804-A
Seller:McDonald Obsolete Parts -
Description:REGULATOR
Phone (812) 359-4965
Obsolete Reliable Parts
Part Number:C6DZ-10804-A
Seller:Obsolete Reliable Parts -
Description:REGULATOR, INST CLUSHTER VOLTAGE
Phone (229) 686-5101
Nos Parts Source *Fo
913.220.5746
Miller Obsolete Parts
Part Number:C6DZ-10804-A
Seller:Miller Obsolete Parts -
Description:REGULATOR GR-510
Phone (607) 722-5371
McDonald Obsolete Parts
Part Number:C6DZ-10804-A
Seller:McDonald Obsolete Parts -
Description:REGULATOR
Phone (812) 359-4965
Obsolete Reliable Parts
Part Number:C6DZ-10804-A
Seller:Obsolete Reliable Parts -
Description:REGULATOR, INST CLUSHTER VOLTAGE
Phone (229) 686-5101
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