[Mgs] Dash Light Problem

Robinson Charley charleyrob at gmail.com
Wed Aug 29 20:32:43 MDT 2018 

If anyone is interested I have two MGB speedometers, one is at the smaller diameter and the other the larger. Bought the wrong one the first time so reordered and then the project I had bought them for got sold. They are used ones I had bought on line and have never used. They were represented as being in good working order. Either one for $35 + shipping. Both for $60. Let me know if you need more information or pictures. You can respond to me directly at the email below.

Charley Robinson
charleyrob at gmail.com

> On Aug 29, 2018, at 12:40 PM, Max Heim via Mgs <mgs at autox.team.net> wrote:
> 
> Are GPS speedometers actually reliable?
> 
> I would think they would lose the signal in urban areas, tunnels, mountains, canyons, many other places.
> 
> And judging from my bicycling speedometer app, they would register wildly for a few seconds after abrupt changes of direction.
> 
> I suppose it just strikes me as a very roundabout method for an attribute that is easily measured mechanically.
> 
> --
> Max Heim
> mvheim at sonic.net <mailto:mvheim at sonic.net>
> 
> PS: Anecdotally, my project 66 B had been sitting in a wood shop for perhaps 30 years. I cleaned and reinstalled the speedometer and tachometer  — they both work perfectly.
> 
> 
> 
>> On Aug 28, 2018, at 7:36 PM, i erbs via Mgs <mgs at autox.team.net <mailto:mgs at autox.team.net>> wrote:
>> 
>> Classic speed has a great product for speedos https://www.classicautoinnovations.com <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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