LED Light Installation in UHaul CT13 - Page 2 - Fiberglass RV


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Old 03-09-2012, 09:08 AM   #15
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The capacitors are probably overkill, they are for AC ripple. In any case, cheap on eBay as was the heat sink. The capacitors I used are electrolytic, so short wire and marking goes to negative (center) terminal.
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Old 02-09-2013, 08:15 PM   #16
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Just an update. I installed an ammeter in my system so I can measure power usage.

The two original UHaul florescent lights pull 2.5 amps (for both on at the same time). The LED panels draw 0.4 amps (for both on at the same time).
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Old 02-09-2013, 10:01 PM   #17
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I tried twice to replace bayonet-base bulbs in my old Illuminaire aircraft directional spots with LED. The first attempt with SMDs surrounding the stalk and on top produced heat in the aluminum nozzles nearly equal to that produced by 1141 incandescent. Second attempt with nine SMDs all on end of stalk ran cool but dim.

Recently I replaced with Bargman double dome/dual switch fixtures with flat panel 48SMD one side and 36SMD on the other. The T-10 adapters on these Neewer panels are pathetic. I discovered that the conductors can be manipulated to make a solid contact by moving the bare conductor athwart the channels in the plastic wedge base. I wanted both an independent reading light and general illumination in one fixture. I'm happy with the result. I judge that I could step down to 36 and 24 elements in future. I wish I had Tom's grasp of the over-current protection angle. Are the resistors more important than the fusing?

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Old 02-10-2013, 04:33 AM   #18
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........... Are the resistors more important than the fusing?

jack
No resistors used. I did install voltage regulators. Note that these come in two flavors. You want the ones that have a narrow separation between the minimum battery voltage and the regulated output voltage. Otherwise LEDs won't be full brightness on battery power.
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Old 02-10-2013, 07:03 AM   #19
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Sorry-- voltage regulator! Buck sixty per fixture. I think I might add these. One needed per fixture or one per light panel?

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Old 02-10-2013, 07:49 AM   #20
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Sorry-- voltage regulator! Buck sixty per fixture. I think I might add these. One needed per fixture or one per light panel?

jack
Per fixture, assuming you get a large enough voltage regulator to handle the amps - not difficult as the LEDs draw so little current.
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Old 02-10-2013, 11:40 AM   #21
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Don,
Did you have to use a converter or simply change the bulbs? I have the flat 4 pin plug to tow vehicle.
Thanks,
Patti
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Old 02-10-2013, 01:16 PM   #22
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Don,
Did you have to use a converter or simply change the bulbs? I have the flat 4 pin plug to tow vehicle.
Thanks,
Patti

Not Don, but while we are waiting, I'll share my experience. The UHaul tail light fixtures each have two bulbs with two filaments each. Plus a ground wire.

So, how do you connect 10 wires to the 4 pin plug?

If you want to have amber turn signals you use an adapter like this:
Curt Manufacturing 56196 Converter : Amazon.com : Automotive

  • The 2 grounds are connected together to make 1, then to white wire
  • The two filaments in the top, amber sockets are connected together to make 2 pairs, then left pair to yellow wire, right pair to green wire
  • The right and left brake filaments are connected together to make 1, then to red wire
  • The right and left tail light filaments are connected together to make 1, then to brown wire
The wires coming into the adapter wire like a standard trailer with the brown tail light wire bypassing the adapter.
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Old 02-10-2013, 01:28 PM   #23
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Don,
Did you have to use a converter or simply change the bulbs? I have the flat 4 pin plug to tow vehicle.
Thanks,
Patti
I do have a converter so I could get back to 3way and use the amber turn signals but that is not necessary to just change the incandescant to LEDs (both using the bayonet bases.) Simply swap them out. I bought the highest #LEDs in red and amber and they have worked great so far!!! (Made in China off eBay)
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Old 02-10-2013, 02:31 PM   #24
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I ordered four of the 12v regulators from Taiwan. Six bucks. Any tips for soldering these tiny critters?

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Old 02-10-2013, 02:39 PM   #25
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I ordered four of the 12v regulators from Taiwan. Six bucks. Any tips for soldering these tiny critters?

jack

I bought some inexpensive breadboards to give them something to live on. Also use a small electronics soldering iron (not a huge honker) to solder them to the board.

10x 5x7cm DIY Prototype Paper PCB Universal Board Circuit Board Breadboard Good | eBay
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Old 02-11-2013, 10:40 AM   #26
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Thanks Don, Swapping out the bulbs is something I'd like to do.
Thanks Tom, For your info too.
Patti
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Old 02-11-2013, 12:26 PM   #27
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.....Thanks Tom, For your info too.
Patti
I hope it helped, as I was bewildered when I first got into my tail lights, which were miswired when I bought it.
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Old 02-11-2013, 01:08 PM   #28
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Explanation of the rationale for addition of capacitors to the reg circuitry can be found by searching Google for LED regulation topics.

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