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Bad gauge cluster voltage regulator? Easy $2 fix.


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#21 DanielC

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Posted 21 May 2013 - 01:48 PM

On a 521, when the combo meter get ignition power, it applied 12 volts to the oil light, and the (IGN) light, ans well as supplying power to the gauge voltage regulator.

 

If the engine is not running, the oil pressure switch grounds the oil light, it comes on.  The alternator also grounds the (IGN) light, and it comes on.

 

Grounding the sender wire for either the fuel gauge, or the temp gauge, causes the respective meter to read full. 

 

I believe a 510 acts similar to this.



#22 aintnobiscuit

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Posted 21 May 2013 - 02:24 PM

Yep, that's correct.



#23 thisismatt

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Posted 21 May 2013 - 08:49 PM

May I suggest buying a simple buck converter instead of making one?  They are pretty dang cheap and already professionally built, so they'd install clean.  There are some cool ones available, even some with LED voltage displays that will tell you the input & output voltages.  They are a switched mode power supply and they don't generate a lot of heat like a linear regulator, so less heat and high efficiency.  I don't know what the current draw is on the gauges, but probably not above 3A, so these should work fine.  These could also be used to drive LEDs for guages/clusters and one could offset the potentiometer to create a dimmer circuit.

 

Here are some examples on amazon:

 

http://www.amazon.co...keywords=LM2596


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#24 Dguy210

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Posted 31 May 2013 - 11:12 PM

Been playing with this a bit. This should be a direct plug in.  Screw hole is ground, red is 12v+ blue is 9v+.

EC4ADCB3-9008-45F4-89D4-A2048C8A9DC5-333

 



#25 banzai510(hainz)

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Posted 01 June 2013 - 10:22 AM

Exactly!!!!!!!!!!!!!!!

 

tell us how it works


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#26 Ranman72

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Posted 01 June 2013 - 10:39 AM

I just put one of these in my car , I was having intermittent fuel and temp guage  one day it worked next minute it didnt 

I am excited to see if this cures my problem 



#27 aintnobiscuit

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Posted 02 June 2013 - 07:07 AM

Oh man, that looks awesome! Good job! I'm going to do the same thing now!

 

:w00t:

 

It does work, and pretty well. Here's a vid. I forgot to post it a while back. I wish there was a way to make it work faster, but I'm just happy it's working.

 



#28 kelowg

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Posted 06 November 2013 - 06:46 AM

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



#29 datO)))

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Posted 29 January 2015 - 12:05 PM

I have the regulater. Gonna solder it up tonight and let you dudes know how it works:-) I'm excited to solve this minor issue finally

#30 banzai510(hainz)

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Posted 30 January 2015 - 08:02 AM

let us know


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#31 datO)))

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Posted 02 February 2015 - 12:35 PM

So I made my voltage regulator. Just a quick question.
Thers 12v in, 9v out. So wouldint I have two outsputs as there are two blade connection style hookups on
The gauge cluster. Or is one an input and other out put?

#32 aintnobiscuit

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Posted 02 February 2015 - 04:31 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.



#33 datO)))

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Posted 03 February 2015 - 03:49 PM

Ok gotcha. I'm doing mine on lunch brake.

#34 datO)))

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Posted 05 February 2015 - 01:09 AM

Well if it's set up right, I'm almost on E and my temp is bad. At one point
I reversed the 12v and 9v just to cover my
Bases cause Im not wiring guru lol, the fuel registered half a tank and the temp was high.
Turned the car off. After a bit, turned it on, no temp reading.
I'm going to rip my eyes out.
I'll hit it again tomorrow. It's 1:09 am

#35 dat521gatherer

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Posted 06 February 2015 - 07:14 PM

If the rivet is loose on the board under the volt reg your guages will rise and fall intermitantly. .02 fix.



#36 datO)))

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Posted 06 February 2015 - 08:26 PM

Really!!! That's what's going on. Well, I must say I fou a broken wire in my V regulater to so it could be that or the loos rivet.
Thanx man.

#37 datO)))

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Posted 12 February 2015 - 12:54 PM

So my fuel works . And when I add fuel , the gauge reflects the added fuel. The temp gauge still sucks .

#38 banzai510(hainz)

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Posted 13 February 2015 - 06:35 AM

The temp gauge still sucks .

CLEAN THE SENDER AT THE STAT. could be just a bad sender. I seen them go bad. but hard to get thm out of housing w/o breaking them. I usually just swap a whole another housing to conferm the proplem.
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#39 datO)))

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Posted 28 March 2015 - 04:46 PM

The temp gauge still sucks .CLEAN THE SENDER AT THE STAT. could be just a bad sender. I seen them go bad. but hard to get thm out of housing w/o breaking them. I usually just swap a whole another housing to conferm the proplem.


What is the stat?

#40 datO)))

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Posted 28 March 2015 - 04:47 PM

My shit still doesint work . Temp goes all the way up and the same with fuel