All the lights ( license plate, tail, reverse) that are connected to the trunk are not working. We checked the circuit and found out that the ground is open. Where can we find the ground connection to the chassis?
by Visitor in Corona, CA on August 23, 2010
You say the lights on the trunk lid all work properly, it is normally those that sometimes fail if the wires on the drivers side trunk hinge get damaged. Look at any of the white/black wires at the rear bulb holders temporarily add a ground wire to the white/black wire with the failed lights turned on see if the now work. Perhaps add an additional ground to the white/black wire.
We did what you suggested of adding a ground to the black and white wire and the lights work. We are just wondering if the black and white wire got loose at the area it was attached to the chassis. So is it okay to just add an additional ground to the black/white wire? Thank you in advance for your reply
We added an additional ground as you suggested and it fixed the problem! Thanks a lot for your help. FYI. The check engine light also went on when the tail light warning and the "R" on the control panel went on. We had it diagnose and it showed P1780 code which says something about the transmission swith is bad. Anyway, I just read from another forum that this is due 99% of the time to the problem caused by the faulty ground wire for the tail light. I hope this helps the next person who has the same problem.