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Bad gauge cluster voltage regulator? Easy $2 fix.


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#41 ggzilla

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Posted 28 March 2015 - 08:19 PM

Different question, how much voltage is supplied to the sender itself. Is it just straight 12 volts?


The fuel sender is a variable resistor ground.

The temp sender is temperature affected ground.
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#42 MikeRL411

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Posted 28 March 2015 - 09:17 PM

The fuel sender is a variable resistor ground.

The temp sender is temperature affected ground.

 

Back to the basic question!  NO 12 volts is NOT applied to the sensor.  The regulated 8.6 mechanicaly regulated voltage  [or 9 volts if you use the electronic regulated item specified in the basic subject entry!] is applied.  The resultant current flow is applied to the meter which should dampen the almost square wave 8.6 or electronic 9 volts and give a "correct" reading.



#43 ggzilla

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Posted 28 March 2015 - 09:20 PM

Correct. Voltage is applied to the gauge (meter).
Gauge is grounded by the sender unit.
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#44 accordfreak

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Posted 22 May 2015 - 12:21 PM

12v into the VR, 9v out of the VR, common ground. You power the gauge cluster with the 9v out. I'm doing this for my 521 in a couple hours, so I'll post pics if you want.

aintnobiscuit did it work ok on your 521? any pictures?



#45 marky510

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Posted 17 January 2016 - 09:15 AM

Just found this how-to. It sounds great and I'm going to be doing this to a few of my cars. But the pictures have gone missing, not loading up. Are they still around still?

Mark


1970 Datsun Roadster 1600

 

1963 Datsun 312 Wagon

 

1966 Ford Cortina Wagon

 

1972 Ford Escort Mk1


#46 russ1966stang

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Posted 26 January 2016 - 07:47 PM

Hi,

I was wondering if the articular you posted for the cluster voltage regulator was for the 1966 mustang? I was wondering if the original could be replaced in my 1966 ford mustang. they are way to much for the size of them and would really appreciate if you had a chance to reply. would much rather go the way you did but i might need some kind of diagram or some info.

Thank you

Russ



#47 datzenmike

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Posted 26 January 2016 - 08:19 PM

Russ this is a Datsun forum so no it's not for a '66 Mustang... BUT if the Mustang gauges are run from a similar 8.6? volts supply then possibly it could be used for that. A Mustang or Ford forum might have this info.


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#48 russ1966stang

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Posted 26 January 2016 - 08:52 PM

yes that's what i was thinking, the guy who made original post had 3 different cars, one was a 66 mustang. 2 friends of mine had 280 z's one put a big block in and the other has a 350, they sound sick. :):):) as in good :) well thanks for the reply, appreciate it.:)



#49 russ1966stang

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Posted 26 January 2016 - 08:58 PM

thanks, for the reply datz, not sure if my last response made it but back to you, below, one of your members who posted original , had a mustang for one of his cars , and it came up on a search for mustang voltage regulators for gage cluster, thanks again :) intnobiscuit

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#50 datzenmike

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Posted 26 January 2016 - 09:18 PM

Sorry, didn't check back enough posts. If not compatible maybe the components can be jumbled around to tune it to the correct regulated voltage???


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#51 Dguy210

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Posted 27 January 2016 - 01:14 AM

Sorry, didn't check back enough posts. If not compatible maybe the components can be jumbled around to tune it to the correct regulated voltage???

The voltage regulator IC used for that can be found in a variety of output voltages so it is pretty easy to change. 5v is used for the gauges on a 1965-66 Mustang instrument cluster. Linear voltage regulator L7805CV would work. For the early Mustangs I'd probably modify the simple circuit here to filter the input slightly using at a minimum a bridge rectifier and a couple of capacitors on the input. The Mustang aftermarket is extremely well supported and you can buy these all over the place although usually in the ~$40 range.



#52 aintnobiscuit

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Posted 28 February 2016 - 07:12 PM

aintnobiscuit did it work ok on your 521? any pictures?

 

No, unfortunately it didn't work. The gauges only read from about 25% -> 50% instead of from 0 -> 100% full but this truck has weird wiring problems I haven't had time to sort out. I moved to hawaii and didn't bring any cars... just came back so here I am. Can't wait to start working on the truck again.



#53 Dguy210

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Posted 28 February 2016 - 11:59 PM

Datzenmike please remove if you think this should go to the classifieds. This is not a for sale post just a feeler post.

 

First I'm not taking orders, I just want to know if there is interest enough in these to justify me ordering parts and building them for sale.

 

I've built and sold the voltage regulators in the past, there is a picture earlier in the thread of my old one I built.

 

I'm thinking of building these again and doing some minor improvements to the design also. Mostly add a reverse voltage protection and a little bit of filtering (e.g., a diode and capacitor on the input). This would up the cost of materials (2-3 times) and the time to build each one. The improvement would be the increased ability to survive reverse voltage if hooked up wrong. Downside is more expense on materials, longer time to assemble, and slightly bigger final size.

 

Most likely shipped cost would probably be at least $20 due to increase in time and materials.

 

Last time it was a bit of a pain in the ass all things considered, and I only made a couple dollars per and had to drive to the post-office each time.

 

Shipping was the most expensive part and going to the post-office each time was not fun. I can't mail from my house, every time I tried they would just disappear into the mail system and I would have to send out a replacement, only for them to show up months later. Most of the regulators sold to people not on the forum.

 

So is this something people would want? Is it worth me buying the parts and building these for sale?

 

 



#54 Motorhan Racing

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Posted 09 March 2016 - 06:23 PM

I'd buy one for my son's '72 510.

#55 Lobo

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Posted 11 May 2016 - 08:01 PM

Dguy I would be intrested