Diagnostic Information

^a VBAT when heater is on; will cycle from 0 to VBAT to 0 during KOER test.

^b Not used on F650/750.

^c 4R100 transmission only.

^d Econoline only.

^e Voltage goes to 0 when water in fuel activates switch.

^f Pin not used on F-Series or Excursion.

^g Neutral switch — F-Series with AT545 Allison automatic transmission.

^h Not used on F-series.

ⁱ F650/750 only.

^j F-Series 250/550

^k Output is in Hz. and varies with vehicle speed; zero Hz when stopped; 450 to 750 Hz. at 50 mph.

^l Not used on Econoline.

^m Voltage increases as manifold air temperature increases.

ⁿ Voltage normally 0, goes to VBAT when PTO switch is turned on and ignition is on.

^o Will momentarily go to VBAT during lamp check.

^p Voltage goes to VBAT if engine is not running and key is on for over 20 seconds.

^q Grounded when heater is on; will cycle from VBAT to 0 to VBAT during KOER test.

^r Voltage increases as fuel level increases.