Thanks for replies,
Well have spent the day checking and measuring so,
Front sensor 0.494 Meg-ohms, Rear sensor 0.451 Meg-ohms
Front sensor gap 0.88 mm, Rear gap 0.83 mm
The resistance was checked at the connector for each sensor and the ABS unit plug, both where very close.
Are these reading what would be expected as I can't find what the sensors resistance should be.
I did manage to troll the web and found an old forum post about an ABS port similar to the dealer mode, makes the ABS led blink a code if there is a fault, and wouldn't you know it it threw up 3 codes and if the other post is to be believed they are,
Code 35 Main unit error, I.e. broken fuse or relay, wire short,faulty ABS control unit, Faulty hydraulic unit.
Code 45 Wheel sensor circuit open
Code 61 Hydraulic unit failure
So none of them sound too great
Is there a way to manually cycle the ABS pump as a test, as at this point its looking like a replacement unit is required