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  #1  
Old 10-07-2009, 07:30 PM
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$@#% clock!

I just replaced the diodes in the clock on my '83 300SD and tested it with 12vDC from a battery charger on the bench and it held excellent time for over five hours. Put it back in the car and... nothing. Tested power to it, getting 12v... WTH?

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Old 10-08-2009, 02:27 AM
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I'd be interested if anyone has any insight into this, too. I replaced the capacitor in the clock of my w124 and found the exact same thing - it worked fine when tested, only to once again barely keep time when back in the car.
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Old 10-08-2009, 02:32 AM
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Quote:
Originally Posted by Justin_P View Post
I'd be interested if anyone has any insight into this, too. I replaced the capacitor in the clock of my w124 and found the exact same thing - it worked fine when tested, only to once again barely keep time when back in the car.
I assume you meant 'capacitors' (plural)? Did you also use a power supply other than a battery when you tested it? Just curious.
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Old 10-08-2009, 02:40 AM
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Nope I meant capacitor, there is apparently only a single one in the clock of that era (1991). From memory I tested it using a battery, not a power supply.
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Old 10-08-2009, 01:34 PM
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Originally Posted by Justin_P View Post
Nope I meant capacitor, there is apparently only a single one in the clock of that era (1991). From memory I tested it using a battery, not a power supply.
Oh I see... I guess it's time to pull it back out and start over.
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  #6  
Old 10-08-2009, 04:41 PM
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Don't forget, the ground is just as important as the +12 V.
Paul
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Old 10-08-2009, 04:46 PM
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Originally Posted by pmckechnie View Post
Don't forget, the ground is just as important as the +12 V.
Paul
I saw that in another thread and I have an auxiliary ground wire going straight to the chassis.

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