How do fans operate?

[e635815]

I have a 2000 Chim 500 with two fans and the otter switch on the radiator.
When the car is left idle until the fans kicks-in, only one fan runs (the left hand on, close to water inlet). But when I short the otter switch, both fans work together (without blowing fuse ).
Is there a sequential fan operation? I thought they would both come in at the same time, wouldn't they?

[TJC46]

Mines a 1997 chim and both fans come on together. Check and clean the wiring connectors approx middle of the rad, possibly pushed underneath it, then bridge the otter switch and both fans should come on. Also check the fuses, i think although not 100 per cent sure, later model chims have a fuse for each fan.

[e635815]

TJC46 said:

then bridge the otter switch and both fans should come on.

That's what I did and the come on together. That rules out the fan not working and the blown fuse.

Do they always come in together, that's my question?

[TJC46]

e635815 said:

That's what I did and the come on together. That rules out the fan not working and the blown fuse.

Do they always come in together, that's my question?

Straight froward answer then is yes they both should come on together so as said earlier check the connections below/underneath the rad. Clean and copper grease both and you should find they both work. There are 2 no connectors you can swap them around as this will help you identify if one of the connectors is the problem. Hope this helps, Tom.

[V8NRG]

My understanding is ... As standard they come on together but if you have something like the modwise cooling kit fitted on will come on at a lower temp then both together.

What temp is the one kicking in at ?