Constant Voltage Regulator, Overheating?
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Lead Driver
Joined: Jul 2011
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From: On the Edge of the Desert
Constant Voltage Regulator, Overheating?
My temp and fuel gauges stopped working suddenly today. It's 117 degrees outside, and I don't know how hot under the dash... is it possible the CVR is overheating?
After a short (5 minute) shut down, I started it back up and they worked again for about a minute.
Everything is hot around here.
After a short (5 minute) shut down, I started it back up and they worked again for about a minute.
Everything is hot around here.
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Lead Driver
Joined: Jul 2011
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From: On the Edge of the Desert
Nobody has any idea, eh?
After it "cooled down" for about 30-40 minutes yesterday, I went on my merry way and everything was fine and has been since.
I guess I'll just chock it up to a fluke and see if it ever happens again.
After it "cooled down" for about 30-40 minutes yesterday, I went on my merry way and everything was fine and has been since.
I guess I'll just chock it up to a fluke and see if it ever happens again.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
My temp and fuel gauges stopped working suddenly today. It's 117 degrees outside, and I don't know how hot under the dash.
Is it possible the ICVR is overheating? After a short (5 minute) shut down, I started it back up and they worked again for about a minute.
Everything is hot around here.
Join the club, it's very hot here in LA LA Land too.
Is it possible the ICVR is overheating? After a short (5 minute) shut down, I started it back up and they worked again for about a minute.
Everything is hot around here.
Join the club, it's very hot here in LA LA Land too.
When the ICVR begins to fail, the needles of these gauges do the "hula" .. swing rapidly back/forth on their own.
When the ICVR fails, the needles don't move.
ICVR attaches to the backside of the printed circuit board. D1AZ-10804-A .. ICVR (Motorcraft GR-513) / Obsolete ~ Available NOS & from auto parts stores.
1971/86 F100/350; 1971/91 Econoline; 1978/86 Bronco // Misc. 1971/89 FoMoCo Passenger Cars.
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Lead Driver
Joined: Jul 2011
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From: On the Edge of the Desert
Interesting. They didn't swing around, just fell down to "zero". And actually the fuel gauge stayed slightly above empty. Around 1/8 tank.
Possibly related? The right turn signal was acting up as well. Or at least the indicator light was.
But like I said, once everything cooled off a little bit, it's all back to normal.
Possibly related? The right turn signal was acting up as well. Or at least the indicator light was.
But like I said, once everything cooled off a little bit, it's all back to normal.
Post Fiend
Joined: Apr 2002
Posts: 19,311
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From: Waterloo, Iowa
Interesting...Do you have a volt gauge in the dash, i.e. was charging voltage normal? If you're really curious you could try hitting the VR with freeze spray the next time it acts up. Might be tough to do, but "take one for the team". M'k? 
Hotshot
Joined: Mar 2013
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From: Phoenix, Az.
My feeling is the printed circuit board on the back of the cluster. The plastic film of it heating up, warping from the heat, or cracking. Heat separating the crack. It's the only thing all your above have in common.
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Lead Driver
Joined: Jul 2011
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From: On the Edge of the Desert
Originally Posted by Tedster9
Interesting...Do you have a volt gauge in the dash, i.e. was charging voltage normal? If you're really curious you could try hitting the VR with freeze spray the next time it acts up. Might be tough to do, but "take one for the team". M'k?
Originally Posted by JEFFFAFA
My feeling is the printed circuit board on the back of the cluster. The plastic film of it heating up, warping from the heat, or cracking. Heat separating the crack. It's the only thing all your above have in common.
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Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
1971/72 F100/350 & 1971/74 E100/300: TWO different printed circuit boards.
D1TZ-10K843-A .. Printed Circuit Board-Use with Oil/Amp GAUGES / Marked: D1TF-10C956-AA / Obsolete ~ 4 available NOS
D1TZ-10K843-B .. Printed Circuit Board-Use with Oil/Amp WARNING LAMPS / Marked: D1TF-10C956-BA / Obsolete ~ 8 available NOS
D1TZ-10K843-A .. Printed Circuit Board-Use with Oil/Amp GAUGES / Marked: D1TF-10C956-AA / Obsolete ~ 4 available NOS
D1TZ-10K843-B .. Printed Circuit Board-Use with Oil/Amp WARNING LAMPS / Marked: D1TF-10C956-BA / Obsolete ~ 8 available NOS
Tuned
Joined: Mar 2000
Posts: 466
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From: Albuquerque, NM
Sometimes after I start my truck, the gauges, as well as the turn signals, will not work. The fix for me is to jiggle the starter switch key. Then everything starts working again. I know it is the starter switch in my case. I have a new switch to replace it with but it has not been a priority to change it yet. Maybe the same as your situation?
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Lead Driver
Joined: Jul 2011
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From: On the Edge of the Desert
Originally Posted by DAV1972
Sometimes after I start my truck, the gauges, as well as the turn signals, will not work. The fix for me is to jiggle the starter switch key. Then everything starts working again. I know it is the starter switch in my case. I have a new switch to replace it with but it has not been a priority to change it yet. Maybe the same as your situation?
Lead Driver
Joined: Apr 2011
Posts: 6,399
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From: El Dorado, Arkansas
I wish it was just hot here. I could more easily deal with that. The main problem in my area is the stifling humidity. Feels like you're in a perpetual sauna. You don't even have to be doing anything for sweat to be dripping off of you. If you are doing anything, you're clothes will be drenched with sweat. Definitely my least favorite time of the year. I'm more of a fall weather type guy.