My wipers on my 2010 range rover 3.6 TDV8 work for approx 3 cycles then stop in any random position, I put it on flash wipe and it does 3 cycles then 1st speed and 3 cycles then I put it on fast speed and yes 3 cycles again. But now it has stopped no matter where I put the stalk there is no movement. So I turn the ignition off and back on again and I get the same 3 cycles in each speed position, is it likely to be the control box and where would I find it in my RHD vehicle. Help please.