electric blues

[stevemat]

Hi all you snake charmers (sorry COBRA owners):drive:
Please can any body tell me how to get my Smiths elcetronic speedo to work Ihave fitted 4 magnets to the prop and a sensor to the body wired it up and get NO reading when driving around.:boohoo:

[Purple AK]

Steve.
Have you connected the red wire (pullup voltage) to ign+ ? I needed to do this before mine would work!

[stevemat]

Thanks yes RED to ing+ black to earth Green to live and WhithBlack to sensor
STILL NO READING:thumb:

[Purple AK]

Ah. Red/Blue should go to the magnetic sensor. Not Black/White

[stevemat]

Thank you AGAIN TRYed this NO READING this time I'll try somthing else tomorrow:thumb:

[craggle]

On my Gauge I only connected the following (Smiths Cobra gauge using the Tremec gearbox sensor)

Green to ignition +ve supply
Black to ground
Red/white to dash lamp power
White/black to sensor.
The other terminal on the sensor needs to be connected to ground.

If you still get no reading make sure the sensor is close enough to the pickup points (magnets) as there may be too much of an air gap.

Red/blue is described as going to a magnetic sensor input. What type of sensor are you using and does it only have 2 terminals or 3?

Craig.

[stevemat]

Thanks craggle the sensor has 2 wires 1 connected to ground the other to blackwhite sometimes got a reading ? tryed redblue NOTHING so back to bw sometimes get a reading on BuMpY RoAd'S so I'm still trying anything
many thanks

[Happy Jim]

Originally Posted by stevemat

Thanks craggle the sensor has 2 wires 1 connected to ground the other to blackwhite sometimes got a reading ? tryed redblue NOTHING so back to bw sometimes get a reading on BuMpY RoAd'S so I'm still trying anything
many thanks

I had to "feed" my sensor with 12volts and then read the pulses from the other wire (ie the sensor makes a connection each time it passes over the magnet).

The other thing to do is make sure you've set the pulses about right on the speedo (tweak later), if your a country mile out it may be working...just not registering

Rgds

Jim