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Old 04-26-2013, 06:52 PM   #1
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switch label lighting?

In my 2001 LTC 7390 the lighting on the switch labels went out. I have seen in this forum that it may be fiber optic and a burned out bulb. Not in my case.

I have managed to get in the dash far enough to see that there is some type of electrical lighting in each group of switches. There are 2 small gauge white wires from each cluster that all go back to a small transformer looking device. It appears that the switch labels are lit by a low voltage system which gets its power from this transformer.

Of course this is a National supplied part not Freightliner. I have Googled the numbers on the part and have found nothing. Anyone have any thoughts on this?
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Old 04-27-2013, 09:56 PM   #2
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You are correct that the instrument panels were supplied by National not by the chassis manufacturer. I don't know if your is the same as my Dolphin. The first time I removed the right panel, there is a yellow sticker where the two small white wires connect to the lighting strip that says "Caution, 110 volts". I don't remember if it said it was AC or Dc voltage, but I was surprised buy the sticker and that they would need that voltage just for switch lighting.
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Old 04-27-2013, 10:23 PM   #3
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You might try calling TECHLITE Corp. 7718 Loma Court, Fishers, Indiana 46038 Phone: 317/578-2626
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Old 04-27-2013, 10:25 PM   #4
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WOW 110 volts. I didnt see any stickers on the wires. I would think if it were 110, it would most likely be DC. I am still stumped and hoping someone can shed more light on this.
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Old 04-29-2013, 03:40 AM   #5
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Good Morning, looking at your picture at the wiring Red + hot/ Black - Ground would point to a DC voltage supply (marine and automotive). Did you follow the red wire back to a fuse? The box you show look like a transformer for LED lighting. The two white wires are going to two different lights fixtures? If that the case where are they picking up ground?
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Old 04-29-2013, 07:11 AM   #6
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The dash lights in my 1999 Tradewinds are "EL". That transformer thing is a EL inverter to convert 12VDC to around 110 VAC (very low current) they are available on the web. This is the company I have most often seen as a supplier Cape Innovation (also trading as Dupree Products).

Good Luck
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Old 04-29-2013, 10:21 AM   #7
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The same as my 99 Dolphin. What is "EL"?
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Old 04-29-2013, 11:02 AM   #8
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I think you got it, the to white small wire would be supply and return of a EL light stripe. Here some information www.sparkfun.com. Good luck

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Old 04-29-2013, 02:33 PM   #9
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Thanks for the replys guys. I was just about ready to duct tape a flashlight to the dashboard and call it good. Now that I know what to chase, the hunt is back on.

Thanks again.
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Old 04-29-2013, 04:39 PM   #10
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Quote:
Originally Posted by mbrandt1402 View Post
You might try calling TECHLITE Corp. 7718 Loma Court, Fishers, Indiana 46038 Phone: 317/578-2626
This is the wrong company. Sounded good didnt it?

There are no specs on this little inverter to shop with. It appears that I need to know how many feet of EL I'm dealing with. This is a big unknown. Any further ideas? I'll make some calls tomorrow.
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Old 04-30-2013, 10:07 AM   #11
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Quote:
Originally Posted by chboone View Post
The same as my 99 Dolphin. What is "EL"?
Orient Display - EL Backlight

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Old 04-30-2013, 10:34 PM   #12
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Dick,
Thank you for the information.

Chuck
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