lighting malfunction

Hi, unfortunately - no reasonable suggestions to offer from this forum for this kind of concern. The dealership is asking for more time -- a lot more time -- because it's going to take some pretty significant troubleshooting to find the problem. It could very likely be wiring harness related, or at the very least - following circuit testing through the harness to determien the root cause. You may be able to find a less expensive diagnosis - check with a shop via the search below, it's worth having a look to see what a shop near you would charge to continue troubleshooting. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.