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Old 11-25-2010, 08:46 PM   #1
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Bedroom Digital Clock wires help?

Bedroom clock was not working...


Pulled it out, and tested it.




It works fine if the black wire is Earth, and the Red AND Blue wires are powered.

I am guessing that the red wire is the master power, keeps the time, and the blue is a switched live, and powers the display up.
Could it be the rocker switch mounted below the clock?

And whats with the yellow and orange wires joined together???
What do they do?

Anyone?
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Old 11-26-2010, 09:18 AM   #2
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that looks just like the clock from a 1978 chrysler lebaron. maybe someone can find a diagram for that? i think the display has a high and low. the dim is for night time.
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Old 11-26-2010, 10:42 AM   #3
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If it works on the bench and not on the wall I would look at the wires on the wall.

Your assumption that one wire is power at all times and one is switched power for the display is most likely right.

Test the red and blue wires to ground. One of them should be battery and one should be switched. If there is no power on either I would look for a fuse. Since nether wire would be high current that fuse may be directly behind the clock as a small inline fuse rather that back at the panel. However if other lights are also not working then the lock is on a fuse in the panel.

If the yellow and orange wires were connected before you removed it I would leave them along as they may have had some other function in another application of that clock.
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Old 11-26-2010, 11:55 AM   #4
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Good call Howie, and thanks for the input...
I missed an important part of the story...
The wires were disconnected behind it, thats why I assumed it was faulty!
Someone had been in there messing... Its a mess...
Anyone got a pic of how that area should look?
Mine has a mounting bracket for something... and a hole drilled.

Rich... you are spot on and great call.... It looks exactly like the clock in that era Lebaron...
Look at this pic I found on Ebay... its a 1982, but the same!
The "Chronometer" logo is above the display, rather than below tho.



Zoomed...



Now doing a search for the wiring schematic for it!
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Old 11-26-2010, 10:35 PM   #5
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i think i still have the clock if you need it but can't get to it until april 2011.
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Old 11-26-2010, 11:41 PM   #6
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Thanks Rich, but it works, just gotta figure out what wires go where now!
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Old 11-27-2010, 10:34 PM   #7
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I would expect that you'll find that the two extra wires control the dimming function. In a typical automotive application, one would go to the instrument lights, and the other would go to the running light circuit. Presence of power on the running light circuit would cause the voltage on the instrument light circuit to control the display brightness.
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Old 11-27-2010, 11:38 PM   #8
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Thanks Jammer!
I was there today, and tried to get a pic of what I have behind there...
Couldn't get my head in to see!
I know that I only had to snip 2 wires, and I am pretty sure that teh black, Earth was not connected.
Pray tell me why you would use all the same color wires....
Here it is...


I am gonna assume that the switch controls if the clock is visible or not. I will do some more testing!
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Old 11-28-2010, 06:55 AM   #9
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Same color? That's easy, so you only have to buy one roll.

I've done that.

But when I do I put those little number markers on each one.
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Old 12-01-2010, 07:03 PM   #10
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if you can't find the wiring diagram you can try here and look for a guy here: Mopar Forums - Powered by vBulletin
named Scott and lives in Michigan. he's great with wiring.
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Old 12-09-2010, 06:44 PM   #11
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Here are the wire connections. I will try to scan and post the page tomorrow.
Orange & Yellow= not used
Black = Ground
Red = 12 volts positive
Blue= Connected to 12v+ through switch (Provides a way to turn off display to conserve power)
The Purple wires in the rear compartment are all 12v+. They supply power to the clock and rear reading lights. All on the same 12v circuit.
Hope this helps, Rob
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Old 12-10-2010, 09:35 AM   #12
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Here is the info from the 345 manual.
Rob
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Old 12-10-2010, 11:30 AM   #13
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Perfect Rob!
What is most interesting is that my service manual does not have that page!!!
Where did you get yours?
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Old 12-10-2010, 03:55 PM   #14
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That is just one of the pages in the "H" section in mine. We lucked out and got almost all of the documentation with our 345.
Rob
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