Connection’s temperature gauge, late 4th series Jaeger

[impaw]

Hello,
Sorry, another question from me.
Would anybody know the correct connections for late 4th series Jaeger temperature gauges?
I am afraid to connect and test, as I have fried similar gauges before
There are three connectors, and I´m guessing one is + one is earth and one is for the sender.
Any help is much appreciated, I am wrapping up the final electrical connections now

[impaw]

Here are some photos

[impaw]

I intended to upload photos of the schematics and the front of the gauge as well, but I am having problems uploading photos today, sorry!

[Parisien]

I intended to upload photos of the schematics and the front of the gauge as well, but I am having problems uploading photos today, sorry!

What's the issue, maybe I can help?

P

[impaw]

thank you Frank!
The screen just "hangs" and I do not get an error message.

But, the most important made it through:)

I´ll make another attempt with this mail

[impaw]

Success!
Did you do some magic Frank?

[impaw]

To add some information, as the photo isn't very clear.
The three connectors are marked as follows:

Left: red
Middle: no color (ground?)
right: green

Perhaps this means
Left: +
Middle: ground
right: sender

[Richard Fridd]

Is item 50 a switch? Is the face illuminated?

[impaw]

50 is the ignition switch, and the gauge is item 38 one the picture

[impaw]

I just received a very helpful reply from Ryan Linley from https://ryanlinleyrestoration.co.uk

"The middle terminal is ground as it has no insulator.

Green is more commonly used as the positive feed on italian cars (same on ferrari, alfa).

The red should be to the sensor.

It is quite often the case that the coloured washers have been mixed up during previous repairs so it may be best to test the unit with a small 9v (pp3) battery, this avoids the risk of damage during testing.

Simply connect the positive to green terminal.

 negative to the central terminal.

(The pointer may show hot or cold at this point)

Now simply touch the red terminal to the center terminal for a moment.

(You should see the pointer move to the other end of the scale)

If you get no movement, repeat the process with red as pos and green as sender.

The 9v battery must be the alkaline type and not a rechargeable.

The standard alkaline battery cannot produce enough current to damage the unit👍