power steering feels gone happened about a month ago. belts are still good and on 2003 Suzuki XL-7

reservoir is full brake caution light comes on intermittently on dash too

2 answers 1 comment
seek diagnostic, any codes?
thanks for advice
Is fluid circulating in pump? Any kind of whining noise , when turning the wheel ? Do you have a way to test pressure? If not............seek diagnostic..............