[Mgs] Dash Light Problem

Barrie Robinson barrob at bell.net
Wed Aug 29 08:30:55 MDT 2018

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.


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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