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The fuel pump relay in my Mk1 Golf (1.8lt, injected) died. To get home I swapped it with the Load Reduction relay. The car worked fine, except that now when I turn the key to Accessories the fuel pump fires up straight away - the fuel pumps run whether the engine is on or not.

Is this dangerous? Are there any consequences? (Is this even the way it is meant to be?)

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No it is not meant to be like this - some are designed to pressurise on opening drivers door others as you put the ignition on.

So that “repair” got you home - now get the correct relay and fit it so that the correct functionality is there.

If the pump runs all the time it could fail sooner or perhaps cause a flat battery or even a leak...

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