Fan cutting in (well, it's not actually...)

[Garlick]

So, my twin cooling fans were whirling away just fine over the weekend, but this morning absolutely nothing and I had to stop just off the road in traffic before things got too hot.

Now I know I can bridge it for now, but I'll need a permanent fix. Where should I start the diagnosis for the lack of auto cut-in?

Thanks

[Barkychoc]

Bridge it first and see what happens.
Not neccesarily the otter switch at fault.
Its a TVR could be electrical anywhere you know!

It does have enough coolant doesn't it

[ChimpofDarkness]

Start with getting down in the passenger foot well with a torch to check the fuse.

Look in your handbook for the exact position of the fan fuse as TVR swapped things about on the fuse board during production.

Other common faults are:

1) The fan relay/s

2) The otter switch

3) The connectors that sit in a puddle of water just beneath the radiator in the front valance

My money would be on a short in one of the vulnerable connectors described in point 3.

This will have blown the fuse, so remake the connections under the rad first and hold them up higher & out of the water puddle that sits in the front valance by cable tying them.

Once your happy you have good clean & dry fan connectors, return to the passenger foot well & replace the fuse.

All the above is merely an assumption based on experience of a known problem area.

Using a test meter to establish he true source of the issue is clearly a the correct approach.

However, I'd put money on those dodgy connectors being the rout cause of your failure.

Good luck & let us all know how you get on.

Dave

[Garlick]

Thanks very much.

Bridging test will be done first, at lunch, then I'll look further. I did only replace the otter late last year and the recent radiator replacement means I'm full of fresh coolant too. Will check everything later though and will follow your advice, thank you.

[Barkychoc]

Maybe we should have told you to use the search function

[Garlick]

That's less reliable than my cooling system...

[EGB]

Poor connections on Otter switch caused my fans to cut out.