h4: Check Resistance of Injector(s) and Harness
| Steps | _Key Off, wait 10 seconds
_Disconnect 60 pin connector. Inspect for damaged pins, corrosion, loose wires, etc. Service as necessary. _Breakout box installed _Processor connected _DVOM on 20o ohm scale For EFI: Measure resistance of Injector Bank 1 between Test Pin 37 and Test Pin 58 at the breakout box. Record resistance. Measure resistance of Injector Bank 2 between Test Pin 37 and Test Pin 59 at the breakout box. Record resistance. For SEFI: From cylinder balance test: Measure resistance between the suspect Injector circuit Test Pin and Test Pin 37 at the breakout box. Record resistance. For No Starts: Pick any injector and measure resistance between that Injector circuit's Test Pin and Test Pin 37 at the breakout box. Record resistance. Ford CFI: Measure resistance of Injector circuit between Test Pin 37 and Test Pin 58 at the breakout box. Record resistance. Refer to Injector Resistance Specifications |
| Result | Is/are resistance(s) within specifications for the the appropriate engine? |
| Direction | YES
Go to Continue NO For EFI, GO to Continue |
| Notes | For SEFI:
Remove breakout box. Reconnect processor. Service open or short in harness/connector of suspect injector. If OK, replace injector. Rerun Quick Test and Cylinder Balance Test. For No Start: Service open in VPWR circuit For CFI: Remove breakout box. Reconnect processor. Service open or short in harness/connector. If OK, replace injector. Rerun Quick Test. |