there's a voltage controller in the fuse box under the hood it may need to be replaced also if anyone has added anything directly to the battery is wont charge correctly or regulate voltage that is another common issue with these any after market items must be added on the lug in the fuse box after the regulator,and if it needs replacement its fairly easy with a 10mm socket costs about 40 dollars on amazon

So I've posted here before about this but I have an 04 Element and my battery light keeps flickering. I've had 3 charging tests done on the battery and alternator. No issues there. Took it into a shop to run tests and they say they can't get the light to come on. Picked it up and it ran for 3 weeks without coming on again....until yesterday afternoon. Anyone have any ideas?

Battery light issue