[Mgs] Dash Light Problem

Thu Aug 30 05:08:50 MDT 2018

I don't know, the GPS on my phone (Google Maps) works very well. Yeah, you
can lose it in a tunnel, but I don't really have issues in urban areas
(NYC, for example) - and do you really need a speedo to creep along in
Manhattan traffic? ;-)

Dan D
'76B, '66B
Central NJ USA
http://dandibiase.cbintouch.com/

On Wed, Aug 29, 2018 at 10:25 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
>
> 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> 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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