if the vehicle crancks over and warning light comes on but doesnt start this is usually pointing to an immobiliser fault. firstly check that the chip is still fitted inside the key(little glass vile). if this is intact and fitted correctly the the other known fault is the wiring loom between the bulkhead connectors and engine ECU. which have a problem with water ingress or chaffing on the securing brackets.best bet is to get daf to put their diagnostics onto the vehicle and get fault codes
cheekybum1977atyahoo.co.uk
August 2009