[Mgs] Dash Light Problem

Thu Aug 30 10:17:19 MDT 2018

Do one could calibrate the speedo if you change tire size, rear end gears
or transmission.  Just an option ...

Ira Erbs
Portland, OR
typos and artifacts are the fault of my phone

On Thu, Aug 30, 2018, 8:53 AM Charley Robinson via Mgs <mgs at autox.team.net>
wrote:

> 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 prices.
>
> CR
>
> 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>
> 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 <paulhunt73 at virginmedia.com>
>> *Sent:* ‎Tuesday‎, ‎August‎ ‎28‎, ‎2018 ‎3‎:‎25‎ ‎AM
>> *To:* daybell7 at aol.com, 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 <mgs at autox.team.net>
>> *To:* 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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