carlgeldard
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| posted on 26/3/05 at 07:10 PM |
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Speedo senders what type
I think I have wired up my VDO speedo incorrectly. So I need to know what is a Reed switch?
Is it a Oscillator sensor
or a Inductive Sensor
or a Hall-effect Sensor
or a hall-effect sensor with an open collector circuit
It looked like an Inductive sensor on the diagram that i got from low-tension but it will not work.
Thanks Carl 
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Peteff
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| posted on 26/3/05 at 07:49 PM |
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Is it the new improved sensor?
The blue wire goes on the number 8 terminal. Take the other 2 for power to the sensor from the same as into the gauge, 3 and 4 I think they are.
[Edited on 26/3/05 by Peteff]
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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carlgeldard
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| posted on 26/3/05 at 09:24 PM |
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I only have two blue wires fitted the sender and I attached them to 7 & 8 with live going to 4 and earth 3
Graham, Pat say's you know what sender I have it the same as his. The little threaded thing about M6 x 25 with 2 blue wires coming out of the
top.
Thanks Carl
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indykid
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| posted on 26/3/05 at 10:52 PM |
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make sure it doesnt need a positive pull up. my telemetrix one did, and puzzled me for ages.
hth
tom
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Peteff
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| posted on 26/3/05 at 11:13 PM |
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Isn't there a thin red and a green to the sensor as well for power in and earth?. There was on the one we had but it was a flat plate and has an
extended range 300% greater than previous ones. Check if it has terminals to fit the wires to. 4 and 3 are power for the gauge not the sensor.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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JohnN
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| posted on 27/3/05 at 12:49 AM |
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Try this link - I think it covers the reed switch sender you are describing
Caerbnt Instruments (smiths telemetrix)
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Peter Cowley
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| posted on 27/3/05 at 08:13 AM |
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I purchased a vdo sender which was the inductive type. I fitted it yesterday, this has 2 wires running to it from pins 7 and 8 on the speedo - signal
to speedo and feed to sender.
Mine was initially picking up interference through the loom from the coil and was acting almost like a tacho, and its a westfield loom made for
these instruments. I had to run 2 separate wires from the speedo down to the sensor - bloody amateurs !!
With your sensor be careful to set it with the car on the ground, I had one originally and snapped it once the car was on its wheels and rolling.
Peter.
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carlgeldard
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| posted on 28/3/05 at 02:27 PM |
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We had a problem with the speedo sender hitting the propshaft 10pm the night before the SVA test didn't we Pat.
Thanks to Graham who saved the day.
Carl
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carlgeldard
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| posted on 29/3/05 at 08:51 PM |
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Sorted it!!!! It was wired correctly but the switch was faulty. Had it up to 40mph on the axle stands tonight.
Thank Carl
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Northy
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| posted on 29/3/05 at 09:31 PM |
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Did you get it from dodgy Pat? Speedo senders are not his strong point! 
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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carlgeldard
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| posted on 30/3/05 at 12:02 PM |
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Hmmmmmm what can I say
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