Yes I disconnected the Starter and solenoid, and this cleared it, ie, the 4 Amp dissapeared from both the car side and the starter side, it only does it when it's reconnected. I did an insulation resistance check on the starter from +ve to ground and it was all clear. Then the next time I checked it it was going the other way, ie off down the split to behind the dash board. I've not tried the heater controls yet, I'll give that a go when I get chance. I assume 2 things:-
1- my meter is reading correctly
2- I'm checking it correctly (using a multi-meter, with the -ve lead to the battery disconected, connect the meter between the -ve terminal on the battery and the -ve lead I have disconnected.)
I'm terrible with auto electrics as most know