The problem with 95 Jeep Grand Cherokee is the temp gauge is not working , I changed the sending unit but the gauge is still not working , Im thinking I may have a problem in the instrument cluster because the speedometer goes haywire sometimes also . Can you repair a instrument cluster , or maybe send it somewhere for a rebuild , or do I need to find a used one ? I have taken it out but did not see any burnt spots or corroded terminals . Whats the best way to handle this problem