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Voltage Stabilizer

fault finding

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#1 Tom Fremont

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Posted 05 July 2018 - 06:16 PM

What is the failure mode on these?

 

My fuel and temp gauges pegged themselves ( to the high end ) today, correcting themselves after some time. What else could be the culprit?

 

Cheers,

Tom


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#2 John L

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Posted 05 July 2018 - 08:05 PM

Normally to test the fuel gauge is working, is take off the wire at the sender and touch it to earth, the gauge should rise to read full.

To test the voltage stabiliser you would need an analogue tester, as the stabiliser gets 12 volts it works a bit like a flasher unit, opening and closing and so actually sends out only 10 volts, you can only see this best with an analogue tester.

Hope that helps?

John


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#3 Tom Fremont

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Posted 05 July 2018 - 08:35 PM

Thanks, John. Since both gauges returned to their correct positions simultaneously, twice today, I'm ruling them out. Just fishing to see if anyone else has had this happen; first time for me in 45 years of continuous TR ownership!

 

Tom


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#4 RobH

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Posted 05 July 2018 - 08:36 PM

If both gauges did it, that is pretty conclusive. Could be a bad ground on the stabiliser or a faulty unit.


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#5 harrytr5

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Posted 05 July 2018 - 08:51 PM

I fitted a separate earth on the voltage stabiliser and all good now.

Regards Harry.


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#6 peejay4A

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Posted 05 July 2018 - 09:06 PM

If the gauges end stopped I suspect that the contacts in the regulator stuck closed for a time. It will probably happen again.
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Pete 

#7 aardvark

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Posted 06 July 2018 - 06:34 AM

Try a brand new voltage regulator. As its new it must be better .... what could go wrong?😬
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#8 peterh

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Posted 06 July 2018 - 07:47 AM

What is the failure mode on these?

 

My fuel and temp gauges pegged themselves ( to the high end ) today, correcting themselves after some time. What else could be the culprit?

 

Cheers,

Tom

 

 

Hi

   With the Voltage Stabiliser remove I found the temp gauge when right over to high, do not know about the fuel gauge as was to worry about the temp untill i work out what was wrong. With the voltage stabiliser back all was OK and my car a TR250.

    Peter


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#9 Tom Fremont

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Posted 06 July 2018 - 03:26 PM

Thanks all; I'll look through my collection and fit a spare if I don't find any grounding issues ( as I likely won't ).

 

Cheers,

Tom


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#10 John L

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Posted 07 July 2018 - 07:49 PM

Tom

Is your stabiliser still in the speedo, so the earth will be on the thumb screws that hold the gauge in.  The PO of mine has relocated it to the bar just under the knee pads.

John


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#11 Tom Fremont

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Posted 08 July 2018 - 11:39 PM

Hi gents,

 

Replacing the suspect stabilizer with another used one seems to have cured it - but I can't rule out the grounding issue with the knurled nuts which hold the gauge into the fascia; maybe I tightened it more when going back together.

 

Anyhow, both gauges now read an eight of an inch higher than they did with the previous stabilizer :unsure: which held steady for the 16 years I've had the car until pegging last week .

 

Cheers,

Tom


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#12 Waldi

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Posted 09 July 2018 - 06:33 AM

Hi Tom,
So you made some petrol!
Cheers,
Waldi
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