Originally Posted by
johnslowley
when trying to start the engine all dash lights come on and the engine fan comes on full speed but the engine wont turn over any suggestions i have fitted a new battery it is a 2014 model
When the Fan runs at high speed, it is a sign that the fan module is in EMERGENCY MODE, due to a loss of communication between it and the ECU. Why would the ECU not talk to it? Cause the ECU is not powered up in your car. Why not?
Because the output of the "Engine Control Relay" is not making it to the ECU, this is due to either a bad relay on the RCM or a fractured solder joint on the RCM. And it's almost ALWAYS a fractured solder joint.
Yank the RCM and send it to DJ (see link in Hawkske's post above) or take it to a local cellphone or radio shop (two way radio like what the police and fire carry) and ask them to go over it with a soldering iron. (Most cell phone shops wont' have a soldering iron heavy enough for this repair but you might get lucky - Search "Motorola Kenwood Dealer Service" and you should find something)
Or order an RCM online for around $150 - then get this one fixed later to keep as a spare.