Hello everyone,
the battery warning light on my 90's dash always turns on when I start it but turns off almost immediately afterwards. Well, it did. Now it just stays on, its brightness varying:
- It's always on but very dim. Rev the engine over a point and it goes erratic, continuously turning brighter, then dimmer. I'm assuming it has to do with the spark plugs although I'm not sure (the frequency seems a bit irregular/unstable)
- Use anything that needs electricity and it goes proportionately brighter - accordingly, the battery voltage gauge drops to a bit below the middle mark with the headlights on.
It's been like this for months without any problem to the vehicle's function and it always starts with half a turn of the key. I don't remember the exact values any more but I checked the voltage on the battery and it seems to be fine with the engine off and charging properly (revving increases the voltage up to a point) when running. The battery's own indicator suggests it's ok. I put it on a CTEK charger a couple of times and it charged without any issues.
So what say the wiser owners? What would cause the battery check to state there's a problem when there doesn't appear to be one?