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Pepperbilly
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Joined: April 08, 2017
Posts: 1074
Location: Seattle, Wa
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 Posted: Fri Jan 17, 2025 3:35 pm Post subject: Clock Wiring '73 USA Wagon |
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I want to pull the fuse on my clock and discovered mine is not fused! I pulled every fuse and it kept running. I looked at my original owner's manual and no mention of a fused clock circuit. Apparently my clock is hot wired and before I crawl under the dash to figure this out wanted to see if anyone else has seen this? Curious thing is the Current Flow Diagram shows it is fused. My 412 is as close to stock as you can get but over the years maybe someone changed the wiring to the clock.
Bill |
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raygreenwood
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Joined: November 24, 2008
Posts: 23004
Location: Oklahoma City
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| Posted: Fri Jan 17, 2025 4:36 pm Post subject: Re: Clock Wiring '73 USA Wagon |
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Nope....it's constant. According to the Haynes wiring diagram, it goes to terminal 30 on the headlight switch. That is a double connection going to the fifth fuse over next to the red 16 amp fuse in the block.
But it goes to the side of the fuse that bridges over to the 16 amp fuse on its left. That 16 amp fuse goes straight to the battery.
Ray |
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Pepperbilly
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Joined: April 08, 2017
Posts: 1074
Location: Seattle, Wa
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| Posted: Fri Jan 17, 2025 6:16 pm Post subject: Re: Clock Wiring '73 USA Wagon |
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| raygreenwood wrote: |
Nope....it's constant. According to the Haynes wiring diagram, it goes to terminal 30 on the headlight switch. That is a double connection going to the fifth fuse over next to the red 16 amp fuse in the block.
But it goes to the side of the fuse that bridges over to the 16 amp fuse on its left. That 16 amp fuse goes straight to the battery.
Ray |
Well, I am surprised. I would have thought that any electrical device that runs all the time would be fused. Is it because the clock draws very little amperage? Any idea if all old VW clocks were wired this way? I was trying to eliminate the clock from running when the car sits for long periods of time during the winter months. Was having trouble with my battery losing cranking ability. Could be my battery is going bad. Will check it out.
Bill |
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Pepperbilly
Samba Member
Joined: April 08, 2017
Posts: 1074
Location: Seattle, Wa
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| Posted: Fri Jan 17, 2025 10:00 pm Post subject: Re: Clock Wiring '73 USA Wagon |
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So I went ahead and read a few posts on “clock repair”. Now I completely understand how mine works and the fact it is not externally fused…it’s all inside the housing. My clock runs pretty well but does eventually lose time although it never stops. From what I have read it looks like just grime buildup. I really hate messing with the dash gauges because of the tight spaces and wires. A project for an ambitious day or just resign myself to adjusting the hands. Not sure…
Bill |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 23004
Location: Oklahoma City
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| Posted: Fri Jan 17, 2025 10:14 pm Post subject: Re: Clock Wiring '73 USA Wagon |
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| Pepperbilly wrote: |
So I went ahead and read a few posts on “clock repair”. Now I completely understand how mine works and the fact it is not externally fused…it’s all inside the housing. My clock runs pretty well but does eventually lose time although it never stops. From what I have read it looks like just grime buildup. I really hate messing with the dash gauges because of the tight spaces and wires. A project for an ambitious day or just resign myself to adjusting the hands. Not sure…
Bill |
Later while driving...I meant to state this! 
There is a fusible solder link inside of the clock. There are a couple of really good threads about working on these clocks.
The fusible link part is easy. Just a dab of the lowest temp solder you can find will fix a broken link. Even a clock in decent shape will eventually burn its fusible link if you live in hot places where dash temps can be 150* in the sumer.
But the question in cool areas is why is it running hot enough to burn the link. Usually its because carbon builds up on the rewind contacts and the yhave a high resistance connection. A simple filing of those contacts cleans that up.
But, eventually just like any watch these need to be cleaned and lubed. Do not use WD-40 or sewing machine oil. The really good thread in here I will find it and link it....these are seriously nice little clocks with jewelled bearings . You need to clean them with the right stuff and use the exact right kind of oil in just theright spots if you want them to live.
Ray |
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