
Will pull and re-seal that tail light and see if that cures it. All of the water off the rear of the roof and tailgate runs over here and there's a seam between two panels under the seal so it's a prime candidate for water ingress even though the actual void into the interior is pretty tiny (just a passthrough for the wiring).
ADDITIONAL: So yesterday evening I ended up wasting the best part of three hours getting a clean print out of this thing.

For the third time in as many months.
If you use it at least once every couple of weeks it's as good as gold. Print quality is second to non, I've printed about 1500 pages and am still on the ink bottles that came in the box and I don't think I've ever had a paper jam. However it's still an inkjet...so it still gets cranky if left unused for any length of time. Well... except for the old HP PSC2179 which we still have in my husband's room that I bought back in 2003...it seems strangely immune to that problem even if left for six months at a time.
I've just had enough of consumer grade printers. I went out of my way to get a decent one when I got the ET4550, and it's still trouble.
After a bit of digging around I've just ordered a reconditioned HP4600dn. Proper enterprise grade colour laser from 2002. I have prior knowledge of this exact model as it's the one printer that even the council roads department couldn't kill...which is high praise for any piece of equipment! Don't think that one was ever out of service from 2005 through to 2012 when we moved buildings. £120 for a reconditioned one with warranty, brand new imaging kit and transfer belt, and toners showing minimum of 40% (they're good for 8000 pages so that'll last me plenty anyway!) sounded like a bargain to me.
Nice that because this is a belt transfer based printer it prints all four colours at once so performance is identical when printing colour or monochrome. A lot of smaller colour lasers from this sort of period used sequential colour printing...so colour print speed would be 1/4 that of mono. The one in our office did about 15ppm mono...but 3 in colour...and it took a good 45 seconds for the first colour page to appear. Much swearing used to happen if you realised there was one hyperlink or something in colour in your otherwise black and white document that you'd not spotted before clicking print, and you heard the carousel with the toner cartridges on moving out of the home position as you stood up from your desk to go get your document...
So continues my quest to eliminate all the consumer grade tat from our IT infrastructure in this house. I was glad to find the 4600dn specifically because it's a model that I've prior experience both using and looking after, so I know it's built like a brick outhouse and is easy to look after. Must be one of the last generation before HP's kit really went down the pan.
I'd *like* one of the original LaserJet battleships...but just because I love kit like that rather than because I actually have a use for one. I really need colour, and having had a printer with a duplexer I'd miss it going back to one without.
I do have a LaserJet 1100 here though, which used to be my "general purpose I want to print manuals etc" choice before I got the ability to print two sided. Given it proudly proclaims MS-DOS comparability on the self test page it must be pretty old...That thing (and the one toner cartridge I bought for it) will probably outlast the human race. It's a real crying shame that in the mid 00s that HP's kit went off a cliff as they used to be so utterly dependable.
I might well see if I can sell the Epson on. It's a really good little printer by modern consumer standards, IF you're a regular user. I just don't use it often enough to keep it happy it seems. To be honest given the fact it's one of the models with the bulk ink tank system (I've had to top it up once in 1500 pages and about two years) if you can find ten minutes to print off a couple of photos a week to keep the heads happy it's not going to cost anything in ink. That's all it probably needs done.
The other gripe I have with it is that the Linux comparability with it is *mostly* okay, but every now and then the scanner drivers decide to fall over and require me to recompile them for no readily explicable reason. It only takes five minutes, but it's still annoying... especially when you just want to quickly scan something for someone. Between it's tendency to be cranky if left idle for longer periods and flaky drivers...nope, time to switch to enterprise grade gear with proper official Linux driver and software support please.
Honestly not sure what it's worth, know I paid the best part of £300 for it about two years ago... probably about £20 given the rate consumer tech depreciates at! If anyone on here wants it I'm sure we can arrange something.
Looking forward to getting the new old HP set up. NOT looking forward to carrying it upstairs mind you, they weigh something like 45kg as I recall!