[Mgs] Dash Light Problem

Charley Robinson Charley38 at twc.com
Thu Aug 30 05:56:42 MDT 2018

I looked on Ebay, found several used MGB speedos for what looked like 
fair prices.  Don't know why I'd want a GPS speedo, especially at those 


On 8/29/2018 9:30 AM, Barrie Robinson via Mgs wrote:
> Hello Ira,
> Went to the site but found it was just like many others ! They put up 
> too much chat and miss the facts.  I could not find a product list 
> with prices - take a look ar Speedhut's web site and you will see what 
> I mean.   Nowadays it is all presentation an not on product. That's 
> why US TV programs have become almost total light displays.
> Cheers
> On 8/28/2018 10:36 PM, i erbs wrote:
>> Classic speed has a great product for speedos 
>> https://www.classicautoinnovations.com
>> Ira Erbs
>> Portland, OR
>> typos and artifacts are the fault of my phone
>> On Tue, Aug 28, 2018, 7:13 PM Barrie Robinson via Mgs 
>> <mgs at autox.team.net <mailto:mgs at autox.team.net>> wrote:
>>     Hello Steve,
>>     Neither my speedo nor tach are working well and when checked out
>>     found it was the heads.  Pricey replacements !   As my MGB GT V8
>>     is not really original it did not take me long to find Speedhut
>>     replacements.   They have a good selection and a brilliant web
>>     site to "build" you own gauge.   Mine will be very very close to
>>     the original but with far better performance and features.  The
>>     speedo is GPS driven - my oath - and has no connections to the
>>     car (except for Lucas smoke to drive the light bulbs). Trouble is
>>     that when I  fit them I will no longer go from 0 to 45-55kph in
>>     less than 3 secs with engine ticking over at 500rpm.:-)
>>     On 8/28/2018 7:27 AM, daybell7--- via Mgs wrote:
>>>     Thanks, Paul.  I’m checking dash ground first thing after much
>>>     good advice, especially about not assuming it’s OK.   Both
>>>     indicator lights work. My tach was acting funny.  The car ran
>>>     fine, but the tach never registered over 3k RPM.  Thanks for the
>>>     good info, Paul and everybody else.
>>>     Steve H.
>>>     Gainesville, FL
>>>     *From:* PaulHun <mailto:paulhunt73 at virginmedia.com>
>>>     *Sent:* ‎Tuesday‎, ‎August‎ ‎28‎, ‎2018 ‎3‎:‎25‎ ‎AM
>>>     *To:* daybell7 at aol.com <mailto:daybell7 at aol.com>,
>>>     mgs at autox.team.net <mailto:mgs at autox.team.net>
>>>     Usually the first step would be to bypass the dimmer rheostat,
>>>     which may not be as easy on a padded dash as on the UK dash. 
>>>     They usually have double spades for each connection, with two
>>>     wires in a single spade on each connection, so it is a
>>>     relatively simple test to move one of the connections across to
>>>     the spare spade for the other connection.
>>>     Have you tested the bulbs work out of the sockets?
>>>     All the gauges should have earth wires on a 72, you can't assume
>>>     the dash is earthed. There should be a black wire under the
>>>     fixing nuts that hold them in the dash, or could be a spade on
>>>     the back of the tach case.  That is fed from a 4-way bullet
>>>     connector that also feeds the right-hand indicator tell-tale,
>>>     does that work?  The left-hand is fed differently.
>>>     Does the tach work as it should?  If so that would appear to
>>>     have a good earth and it's bulb should work at least.  Are you
>>>     looking at them in low light levels?  You won't see gauge
>>>     illumination if the ambient conditions are bright.
>>>     Did you only have one bulb unscrewed when you tested for 12v in
>>>     the socket and all the other bulbs screwed in and fitted?  You
>>>     need to, especially if your test light has an LED or you use a
>>>     voltmeter.
>>>     Take each socket out of the gauge and earth it with another
>>>     wire.  Make sure your earth wire is good, can your test lamp
>>>     check earths as well as 12v?
>>>     PaulH.
>>>         ----- Original Message -----
>>>         *From:* daybell7--- via Mgs <mailto:mgs at autox.team.net>
>>>         *To:* mgs at autox.team.net <mailto:mgs at autox.team.net>
>>>         *Sent:* Monday, August 27, 2018 6:08 PM
>>>         *Subject:* [Mgs] Dash Light Problem
>>>         The dash lights don’t work on my 1972 MGB.  The trouble lite
>>>         will light when I test the sockets, but various new bulbs
>>>         won’t. Does this mean low voltage?   I’ve grounded the test
>>>         light on a bolt and assume the dash is grounded.
>>>         Thanks,
>>>         Steve Hughes
>>>         Gainesville, FL
>>>         ------------------------------------------------------------------------
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