QuestionHello to the Experts and thanks in advance !!!!
Currently experiencing the following issues and am not sure if it is the generator or the regulator.
- Ignition light stays on while car is running
- Battery must be boosted to start the car
- Recently while driving, the engine started to stumble and then the car stalled.
- Generator was removed thinking it was likely the brushes.... however brushes were just fine but connector wires were loose. All tightened up and replaced brushes as anyway as I had new ones
- Inside of generator had minor flaking but certainly did not look copper clean.
- Checked belt and fan and all fine... generator re-installed.\
- All this and absolutely NO difference... same light on .. stumbling ... and draining battery.
??? Replace Generator completely
??? Could a faulty regulator ( control Box ) cause the same prob.
AnswerHi Steve
Sounds like either a faulty dynamo or a faulty voltage regulator.
You can test the dynamo as follows:
1. Disconnect D and F wires (thick and thin) from dynamo.
2. Connect D and F terminals (on dynamo) together with a piece of wire.
3. Connect voltmeter between this wire and Earth.
4. Run the engine at 1,000 rpm (do not race the engine).
5. 12-13V = normal.
6. 5-7V = faulty armature.
7. 1-2V = faulty field coils
8. Remove the jumper wire from D and F.
9. Attach an ohm meter between F and body of dynamo.
10. Resistance should be about 6 ohms.
If the dynamo checks out OK then you probably have a faulty voltage regulator.
Let me know what you find.
