The charging light is on so I figure issues with charging. I have a few questions. One is I can't get the tensioner to move to remove the belt. I watched a video and was shown to use a zip tie on the power steering pulley to hold the belt on. Should I move the power steering reservoir to make it easier to work on the tensioner. Should I remove the power steering pump to make it easier. I am looking for any tips I can get for this job

 

I just had the battery tested and was told bad. If alternator is good would that turn on the red warning light