My late 2004 Ford F-250 had Check Gauges light come on suddenly, coolant
gague spikes high all of a sudden, I headed for repair shop, then just as suddenly engine
temperature gauge went right back to normal. I thought it must be stuck thermostat
, so I replace the thermostat housing and both upper and lower hoses. I refilled degas bottle started truck, and then topped it off again to degas bottle minimum level. After running several minutes, the truck shut down itself. Now it displays "Check Gauges" on message center, but will not crank over despite having charged batteries. I had code reader and found B1209 DTC which indicated instrument cluster failure, IEC assembly #2
JA: Does the light stay on, or does it blink?
Customer: Check Gauges light stays on continuously and no cranking or start sequence happens.
JA: Are you fixing your F250 yourself? What have you tried so far?
Customer: I changed thermostat already. I also ran instrument cluster self disagnostic.
JA: Anything else you want the mechanic to know before I connect you?
Customer: Yes, instrument cluster diagnostic had three DTC codes, but I couldn't find them in Ford Factory manual.