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our car has the same problem, we went to Honda and they say the condensation has messed up the entire wiring and needs to be changes, about 2k. Not good
 

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2019 HR-V EX
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THAT seems difficult to believe! (About the wiring being damaged, not the cost to replace.)

I could understand moisture in a taillight corroding electrical contacts, but not the wiring.
 

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THAT seems difficult to believe! (About the wiring being damaged, not the cost to replace.)

I could understand moisture in a taillight corroding electrical contacts, but not the wiring.
Thats what Honda told us, we r past our warranty, but we do have extended warranty - either way Honda told us that the the wiring and fixing of the damage is not covered.
 

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Can you post a pic of the Honda write up/cost? Would be interesting to see how Honda wrote this up. Thanks.
 

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My hrv is having the same issue on the left tail light, had the car for 4 years now, and just noticed it. I was hearing water moving around when I lifted the trunk.
When I close it, it starts to fill up with water.
 

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Perfect! I had the same problem and using your instructions solved my problem. I didn’t drill a hole but I removed that tiny screw at the tip and the remaining water seemed to have drained all out. I used same black silicone sealant to fill up the gasket’s groove. I don't have a dryer shelf so I placed the taillight assembly in direct 97 degree sunlight here in Florida and in another hour or so I will reinstall it. I’m not looking foreword to that one 8mm nut...

I was surprised at how much water came out of that thing!
 

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Brilliant Sporty Blue Honda HR-V 1.5 iVTEC SE 6 Speed Manual
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Just for clarification, is the cause of the water build up due to;

Water ingress;, heavy rainfall, car washing and such like,

Or, condensation build up due to the light being a sealed unit?

Also, if it is due to water ingress, is it down to the seals failing or is it down to the design of the actual tailgate?

The hatchback version of my previous vehicle had no 'run off' channel between the glass and the bodywork and would result in the water entering either side of the boot whenever the hatch was lifted. Long term this water caused the carpeting to go mouldy and even electrical issues depending on where it pooled. Some owners resorted to filling the gap with silicon gel.

Many thanks.

Regards,

HT
 

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I finally had to repalce the taillight- for a while no water was getting in etc. Then one bad storm and it was filled to just below the level of the bulb. Bought OEM part on line and it took 3 days to get to me- replacd with 1/2 hour.
I suggest you get a 8MM nut driver or socket with extension to reach the 2 of the 4 nuts required.
there are 2 gaskets too - glued to the assembly (if you buy it from Honda they send a new bulb and bulb housing too) I think the gaskets and how they are attached might be where the " leak" occurs.
Nothing was split or cracked and I could not pour the water out of anywhere BUT through the hole for the back up bulb.
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I took mine taillight out. It was a tight squeeze but didn't have to remove the back panel.
after removal I was looking at the install of the 2 rubber gaskets - do yuo think could they be easily installed incorrectly and that leads to these water leaks ?
 

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It has been 2+ years since I removed mine. I don't remember much. The only gasket I can remember is the foam kind around the bulb access.
 
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