nulu,

Thanks so very much for the quick response.
Is this the normal procedure? I only ask as I am not educated on this process at all and have never done it before. I am very familiar with the concept on diesel engines so safety is the key.

I assume that there is a pressure switch that the relay also powers and hence the reason for removing the relay.

Regards,
jimm1009

PS: You profile does not say where you are located in the world. Just
curious.