after investigating the fault this am, i have concluded that i have a lazy alternator,
upon checking the battery voltage with the engine switched off, it returned a good a 12.7V, i then started the engine and checked again, 13.6v (lower than i would like) now the wife drives this a lot and likes her comforts!
so i switched on the following,
Radio, aircon, lights and wipers (as it happened when it was snowing the other morning)
then throw into the equation the fact she was in stationary traffic at idle for around 40 minutes,
i then turned the steering whilst still checking the voltage (i had a helper!!)
this gave 11.87volts! way lower than i feel would be required to keep the electric/hydraulic steering operating.
so i will check the engine earth is clean, battery earth to chassis it clean and monitor this, then order a new alternator if it continues.
any tips on the engine earth lead location? had a quick look, but then had to get to work.
I also checked the wiring at the nsf strut, this was fine and did not appear to be rubbing on anything that i could feel/see, thankfully!
Thanks
Rick