Daddylonglegs
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| posted on 10/6/13 at 04:27 PM |
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Electronic Speedo
My mechanical speedo has finally broken, and it was reading around 15-20% high anyhow, so I have just got hold of an electronic speedo sender to fit
to my type 9 box.
There are 3 wires on it:
Black
Brown
Blue/Red
So I am guessing +Ve, -Ve and signal?
My question is, does that sound right and what type of speedo can I use? At present I have a 50mm mechanical type and would like to keep the same
size/style if possible. Also, money IS an object so nothing bling guys please 
The markings on the unit are: 'GM 30 or 90 (not sure) 185 189 12V 16IMP AK'
I am assuming the 16 means 16-pulse?
Any help much appreciated guys  
It looks like the Midget is winning at the moment......
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avagolen
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| posted on 10/6/13 at 06:04 PM |
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My speedo - Smiths 80mm, not locost - has 3 separate inputs wires that can be used which satisfy most
sorts of trigger signals.
Defined as :- Speed Signal input (Hall ECU), Low Voltage and a pull up/ pull down (if Required)
What you need to do is check yours out.
Power it up and spin it slowly. With a voltmeter, see if you get a 12v pulse between the
signal wire and ground / 12v or a resistance change to ground / 12v.
If you manage to get a signal, you can then count how many pulses you get per revolution
and that will help calibrate your speedo.
I use a Sierra, electronic pickup which is used for the ECU control and not normally a speedo
and that give 5 pulses per 2 output shaft revolutions. (ie, 2.5 pulses per rotation).
Hope this helps.
I am sure more info will turn up to assist.
The Answer for everything, but never the last word....
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avagolen
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| posted on 10/6/13 at 06:10 PM |
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An pictures of your sender?
Here is a picture of my Ford unit which fits in the gearbox at the rear of the normal cable drive.
 
Speedo_sensor_1
 
Speedo_sensor_2
Homemade retainer bracket.
The Answer for everything, but never the last word....
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Daddylonglegs
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| posted on 10/6/13 at 09:56 PM |
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The unit is one of these:
 
Description
It looks like the Midget is winning at the moment......
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stevebubs
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| posted on 10/6/13 at 11:32 PM |
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where from???
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Daddylonglegs
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| posted on 11/6/13 at 06:10 AM |
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Guess! - the Bay of course
It looks like the Midget is winning at the moment......
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Daddylonglegs
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| posted on 11/6/13 at 11:08 AM |
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Bump!
It looks like the Midget is winning at the moment......
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i_froloshki
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| posted on 25/6/13 at 01:02 PM |
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Hi folks,
I do not want to open a new case so i would like to use this one, i hope the author do not mind.
I have a problem connecting the sender with the speedo. I have this sender
Speedometer sender sending unit, magnetic pickup | eBay
and i have this speedo
New Speedometer, 3-3/8"'/86mm, LED light, Chrome bezel | eBay
The current setup of the sender is as follows:
 
I made the speedo connection as in the manual, and it is working, but it seems that i do not get any signal from the sender. I am doing the wires as
in the instructions for the sender, but i do not get any signal. I made a small mistake and connect the speedo signal cable to the tacho wire and it
works. So where is the mistake with the sender installation - 2 wires, brown - ground, blue - signal. the magnet is very strong, tried with another
one to decrease the gap - same sh-t.
Help please.
Thanks.
Yavor
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loggyboy
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| posted on 25/6/13 at 01:12 PM |
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If it helps that a Vauxhall/GM transducer (speedo sender) from an Astra GTE digital dash.
Mistral Motorsport
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coozer
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| posted on 25/6/13 at 01:40 PM |
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I used a sensor off aFWD escort box mated to one of them threaded adapters from Burtons..
1972 V8 Jago
1980 Z750
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Not Anumber
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| posted on 25/6/13 at 04:29 PM |
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quote:
Originally posted by Daddylonglegs
The unit is one of these:
Description
Have you got a link to the one you bought on Ebay please.
Mine has some dreadful sensor stuck on the propshaft that makes the speedo needle bounce about and want to replace it with something that plugs into
the type 9 in place of a mechanical cable.
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