Have a read of this thread ref P1608 watchdog malfunction. It's for a later Transit,but worth checking out.
http://fordtransit.org/forum/viewtopic.php?f=5&t=39393
Wiring chafes between fuel pump and PCM (ECU) on the starter motor area.
Last edited by GVK.; Jul 27, 2013 at 03:51 PM.