iM a retired motor mechanic, with no knowledge on how to check for ecu supply faults.Electrics old style no problem,not these new units.My windscreen washers packed up in the last snow.Thinking it was a seized pump i renewed it,no joy,so checked the fuse again all ok.Then fitted new relay still no go.Last resort fitted new washer/wiper stalk.alas washers still no go.Main dealer not interested as car is 1999/2000 model,and say its probably the ecu.And these no longer available.. Any help on how to check for supply to the pump please.

jeff, October 2013

and if the ecu feeds the washer (witch I doubt)you can run a independent feed to it

mm, October 2013

get a volt meter unplug the connection to the washer pump,conect one end of the meter to the live in plug and other lead of the meter to an earth on the car body turn ignite on get someone to press the washer swtch see if you get 12 volts its not rocket science mate

mm, October 2013