Like 500 says, if you have them, plug in the green test connectors situated under the steering column basically, with the engine off, then just turn on to ignition power only. You will probably need to be on your back looking up from the footwell if you have never done it before. If you have them and do the above you will be able to both hear and see the cooling fans kicking in within a few seconds if all is well.
This page has a picture clearly showing them:
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Cheers,
Nick
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