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Old 03-07-2014, 07:41 AM   #1
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Replacing Headlight & Turn signal units..water inside

Due to leaking headlight and turn signal, I thought I'd replace the units. I bought a set and when I looked inside the fiberglass at the old unit, it looked like Rube Goldberg had installed them. There's a steel frame, a plastic molded plate and 97 bolts with nuts on each. Has anybody tackled this problem? How did you do it? I'm intimidated. (There's also not much room in there).

I'm wondering if I should put in headlight bulbs at the same time Mine are HB3 and HB4. If you have any recommendations on that as well, I'd appreciate it. Thanks!
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Old 03-07-2014, 07:50 AM   #2
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New bulbs for sure
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Old 03-07-2014, 07:54 AM   #3
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I replaced my old headlight units and found about the same thing as you have found. They mounted the headlight unit when they were building the coach anyway that they could without any thought on having to remove them at some point. Getting the old unit out is one thing getting the new one in is another. I can't give you any real advise sine this these things are all different. Maybe some pictures would help. Good luck
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Old 03-07-2014, 10:12 AM   #4
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BTW, the new headlamp assemblies I purchased came with new bulbs pre-installed (which I saved because I did an HID conversion while I was in there).

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Old 03-15-2014, 12:28 PM   #5
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You may be disappointed and find the new headlights aren't waterproof either. Most units with replaceable bulbs aren't truly waterproof. Most have small drain holes at the low point of the lens. They're usually covered with a bright trim piece so they aren't obvious.

If the reflective material hasn't worn off the inside of your current assemblies it's going to be a lot easier to either clean the drain holes or add some new ones.

Years ago both Ford and GM had technical bulletins out about this problem. The dealers were to remove the bright molding (if there was one) and drill a couple 1/16" holes in the lowest part of the lens. The holes would prevent water from accumulating in the lens, and when the lights were turned on the heat would evaporate any remaining condensation.
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Old 03-16-2014, 11:16 PM   #6
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Quote:
Originally Posted by adonh View Post
I replaced my old headlight units and found about the same thing as you have found. They mounted the headlight unit when they were building the coach anyway that they could without any thought on having to remove them at some point. Getting the old unit out is one thing getting the new one in is another. I can't give you any real advise sine this these things are all different. Maybe some pictures would help. Good luck
I did it! Managed to remove the entire Rube Goldberg frame. It was much easier to work on outside the engine compartment. I pulled off the old headlamp and turn signal units and put on the new ones. The most difficult part was putting the bulb units back in the holes. These are a bayonet-type twist-on unit and you have to line them up correctly or they won't go in. Eventually they did.
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Old 03-16-2014, 11:18 PM   #7
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Quote:
Originally Posted by Hikerdogs View Post
You may be disappointed and find the new headlights aren't waterproof either. Most units with replaceable bulbs aren't truly waterproof. Most have small drain holes at the low point of the lens. They're usually covered with a bright trim piece so they aren't obvious.

If the reflective material hasn't worn off the inside of your current assemblies it's going to be a lot easier to either clean the drain holes or add some new ones.

Years ago both Ford and GM had technical bulletins out about this problem. The dealers were to remove the bright molding (if there was one) and drill a couple 1/16" holes in the lowest part of the lens. The holes would prevent water from accumulating in the lens, and when the lights were turned on the heat would evaporate any remaining condensation.
I already replaced one side. You could be right...they don't look waterproof. If I get water problem again, I'll remember your advice. Thanks!
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