Snail fan wiring Type 4 engine

Hi all, can anyone tell me or point me in the right direction as to how the fan is meant to be wired? Mine just has a feed from the coil via a 5A fuse, so it’s permanently on, with no connection to the heater control in the front.
Where should the earth and feed be from?

Many thanks, nick

 

Theres an earth wire to the fan at the bottom of the front heater control so when you put it on full chat it earths the fan and turns it on

 

Has the type 4 engine been a replacement from an original 1.600 ...if so, you wont have the proper electrical connections on the heater controls on the dash which automatically turn the fan on when the lever is moved . Presumably you will be having a separate switch ...can't help you on the earth and feed ...plenty will know .

 

There should be a relay on the motor bracket with a loom from it with an inline fuse. From what i can remember the relay contact side is battery feed through the fuse. The coil/switching side of the relay is fed from the alternator warning light output. And earths through a switch on the hot/cold slider control.
This is so it only works with the engine running. If you are making a loom yourself you could take the relay switching feed from the coil if it’s easier. Don’t take the main blower motor feed from the coil it will overload the wiring.

 

That was fast, huge thanks to you all.

A 2L engine was original fitted so I have the heater control earth, it’s just never had a connection on it since I bought the van 20 odd years ago!
I didn’t know that’s how it was meant to be until I read it on here.

I’ll dig out a relay and get it wired properly.

 

It is wired the same as a simple split charge relay. Pin 30 to battery via an inline fues. Pin 87 to the fan. Pin 86 to the battery warning light wire, Pin 85 is earth switched via the heater control.

 

Thanks Bigherb, which wire do you mean by battery warning light wire? Ignition / charge light? Is it picked up in the engine bay or from the dash?

 

The blue wire that goes to the battery/charge/ignition warning light, at the alternator or regulator in the engine bay.

 

Got ya!

That’s brilliant, many thanks mate. I’ll get on it once the rain stops.