Dispatch mark 2 Wiper Problems

[Toch23]

Over the last week the wipers have lost full speed started juddering back and forth the moment the car is unlocked and eventually just stopped working. After a bit of reading on this forum I found a short post where someone described the exact problem and one follow up post of check the relay but no further information. Can anyone help me locate the wiper relay on my van please? Thanks
Adam

[GiveMeABreak]

Pop your VIN up as there are multiple variants of these...

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[Toch23]

VF7**************[VIN obfuscated, can be read by forum staff]

[Toch23]

OK I found the relays and they all look really clean so i dont think its the relay. any other ideas on what could be causing this? how to determine if its the control stalk, the motor or the BSI?