I can't help much with this as the circuit diagrams I have are for a later model. I can suggest you check fuses F42 and F45 i the main fuse box. Also there is a relay for the blower which you need to find and check, probably in the secondary fuse box under the right hand seat. There might be a location diagram on the underside of the seat base or on the metal slide-out plate which needs to be removed to access the fuse box. Might also be a faulty connection at the ignition switch. Beyond that it gets beyond me as not having the diagrams, and the blower being linked to the air con system and the engine control module.