Overheating and wiring!

So......I'm having terrible overheating problems with my old Defender 90! Decidedthat I'd best sort it out before it goes bang! The radiator needs to be replaced as it's properly knackered but also!
It has two fans mounted on the grill! They're not connected in any way shape or form to the electrics and they are also both knackered! The first question is...Where should they connect to their power supply? The second, this shows why I'm a novice, how do they know when to run and stop? The third question is.... one the radiator, which also also has an oil cooler, there is an electronic something that is also not connected! Does this goto the fans somehow to make them run when it's get too hot? If so.....how!

And the main question to help us answer yours.
What engine, year .

Why has the engine fan been removed? (sorry I know thats another question)

J

As far as I'm aware she's a 1988 with a 2.25l diesel engine. That's what it says when I've search the DVLA using the reg number! She may be two landies cobbled together to make one but I'm really not sure!

The fans are out because neither of them work but there is what I think is a temperature 'thing' in the radiator. At least I think is a temperature thing!

I presume you haven't had it long then?
Post a picture of the engine and by the looks of that rad it's been running on water, never a good sign.

Should have mechanical or viscous fan.

Looks like a temp thing, but don’t look standard.
and that engine would have had a spinning fan on the front .

J

Here's the engine! I know.... iys a bit rope looking but does run really well even though its gets way too hot!

It has these two fans in the front! Neither working weren't even wired in!

Looks like a 200tdi Defender engine to me.

The plot thickens!

Junk the electric fans.
Flush the coolant system, replace rad, thermostat, water pump, heater core, viscous fan, new coolant and start from there.
Oh yes get the correct fan shroud.

Sounds like a plan! Thanks for you're help cause it's much appreciated.

And try and make some sort of cowl from rad to fan, that too far away to work well by the looks of it.

J