Symptom Chart
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart
| Condition |
Possible Sources |
Action |
- The charging system warning indicator is on with the engine running (the charging system voltage does not increase)
|
- Wiring and circuitry
- B+ circuit fusible links
- Upper generator
- Lower generator
- PCM
|
|
- The charging system warning indicator is off with the ignition switch in the RUN position and the engine off
|
- Wiring and circuitry
- Upper generator
- Lower generator
- Instrument cluster (IC)
- PCM
|
|
- The charging system warning indicator is on with the engine running and the battery increases voltage
|
- IC
- Wiring and circuitry
- Upper generator
- Lower generator
- PCM
|
|
- The charging system warning indicator operates correctly and the battery voltage does not increase
|
- Wiring and circuitry
- Upper generator
- Lower generator
- Loose or damaged harness connectors
|
|
- The battery is discharged or battery voltage is low
|
- High key-off loads
- Wiring and circuitry
- Upper generator
- Lower generator
|
|
- The charging system warning indicator flickers or is intermittent
|
- Wiring and circuitry
- Upper generator
- Lower generator
- IC
- PCM
|
|
- The charging system overcharges (battery voltage is greater than 15.5 volts)
|
- Fuse
- Wiring and circuitry
- Upper generator
- Lower generator
|
|
- Battery leakage or damage
|
- Battery
- Wiring and circuitry
- Upper generator
- Lower generator
|
|
- The voltage gauge reads high or low
|
- Upper generator
- Lower generator
- IC
|
|
- The generator(s) is noisy
|
- Loose bolts/brackets
- Drive belt
- Upper generator
- Lower generator
|
|
|
|
- Upper generator
- Lower generator
- Wiring/routing
- In-vehicle entertainment system
|
|
- Dual generator upper fault detected (P0620)
|
- Wiring and circuitry
- Upper generator
|
|
- Dual generator lower fault detected (P1148)
|
- Wiring and circuitry
- B+ circuit fusible links
- Lower generator
|
|
- Dual generator lower circuit fault detected (P1149)
|
- Wiring and circuitry
- Lower generator
|
|
- Dual generator battery lamp circuit fault detected (P0623)
|
|
|