Two weeks ago I bought an 98 XJR Sport. Drove back home at night 100 miles headlights working all ok. Next day had the car jet washed and straight after noticed passenger side low beam not working.


I pulled all fuses and relays, bulbs but seems ok on the outset but lamp still not working but after two days after having it jet washed it was working again and has been working until yesterday after having another jet wash!


On this occasion as before low beam on passenger side not working but to add to the problem. full bean not working on passenger side and even the small park bulbs are out until putting back onto low beam.


I took a quick look and feel around for loose wires but I didn't see anything obvious to the cause of this problem.


Does anyone have suggestion to the possible cause of this shining issue.


Thanks for replies in advance.

 

It is grounding out when it gets wet: find the frayed wire or cracked harness

 

Also check the earth points behind the lamp housings oxidization of the lamp grounds can be found here sometimes leading to weird lamp issues.
Hope this helps and enjoy the ride, what do you think of it so far (apart from the lights) I guess you won't be jet washing it again....