F 150 2WD Pickup V6-4.2L VIN 2 (1997)
Audible Warning Device: Component Tests and General Diagnostics
General Service Procedures For GEM or CTM
1. Verify the customer's original concern.
2. If the inspection reveals an obvious concern that can be readily identified, repair as required.
3. Before removing and installing the Generic Electronic Module (GEM) or Central Timer Module (CTM) connectors, you must disconnect vehicle
power at the battery.
4. If continuous Diagnostic Trouble Codes (DTCs) are recorded and the symptom is not present when performing the pinpoint tests, an intermittent
problem may be the cause. Always check for loose connections and corroded terminals when there is evidence of an intermittent problem.
Complete the entire pinpoint test related to the symptom before replacing the GEM or CTM.
5. If the concern remains after the inspection, determine the symptoms and go to the Symptom Chart.
6. When probing the fuse junction panel, power distribution box, or connectors, damage will result to the connector receptacle if you use a probe that
is too large for the receptacle.
General Service Procedures For GEM or CTM
1. Verify the customer's original concern.
2. If the inspection reveals an obvious concern that can be readily identified, repair as required.
3. Before removing and installing the Generic Electronic Module (GEM) or Central Timer Module (CTM) connectors, you must disconnect vehicle
power at the battery.
4. If continuous Diagnostic Trouble Codes (DTCs) are recorded and the symptom is not present when performing the pinpoint tests, an intermittent
problem may be the cause. Always check for loose connections and corroded terminals when there is evidence of an intermittent problem.
Complete the entire pinpoint test related to the symptom before replacing the GEM or CTM.
5. If the concern remains after the inspection, determine the symptoms and go to the Symptom Chart.
6. When probing the fuse junction panel, power distribution box, or connectors, damage will result to the connector receptacle if you use a probe that
