code 16 is B2290 bad occupancy sensor, it's an airbag safety system code and you can find it under the passengers seat. You can check the wire connections there, but a good scan of the system will need to be done to really isolate the issue.
Trouble code P1507 means: Idle air control (IAC) underspeed error
Trouble code P0171 means: System too lean (bank 1)
Trouble code P0304 means: Cylinder 4 Misfire Detected
Trouble code P0403 means:Exhaust gas recirculation circuit malfunction
dtc 1517 imrc input error
locate unlock code on a 95 ford windstar
Heater circuit fault
On a 2003 Ford Windstar : ( fuse # 17 is a 20 amp fuse for the Cigarette lighter / Powerpoint , and the Datalink connector ) in the fuse panel below and to the left of the steering wheel , by the brake pedal ( it has a cover on it ) If that is what you are asking
Trouble code P1746 means:EPC solenoid low
P1405 Ford - DPFE Sensor Circuit Upstream HoseProbably caused by Faulty DPFE sensor (EGR pressure sensor), or a plugged EGR tube
Trouble code P1507 means: Idle air control (IAC) underspeed error
Crankshaft Position System Variation Not Learned