clee wrote:The fuel pump relay when 'off ' flips the water pump relay timer bullocks so could this be in the mix ??
Nearly..... Fuel pump relay when off, supplies the 12v to the contacts of the "Coolant pump Authorisation relay" which is energised by switching off the ign, via the Central Accessory Unit's timer, which holds the relay coil energised for the coolant pump to operate for a set period of time.
So when the fuel pump relay is at rest, the Coolant Pump relay plays no part in the operation of the fuel pump in priming or running conditions.