The right headlight on my 2000 S40 is driving me crazy. It only works when the outside temp is below 40 degrees, and every so often when I slam the hood or hit a bump. The original headlight was falling apart so I thought that was the problem. No change after I installed a new headlight unit. The prongs in the connector looks good and nothing is bent. I also traced as best I could to try to find any chafing, but everything looks good. HELP!!!!