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  #1  
Old 12-05-2007, 07:46 PM
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No power to clock or radio

This is a 78 240D that I just installed an 82 engine and Im still working some bugs out. The clock works fine when the car is running which is ok if you dont mind re setting the clock every time you go somewhere, that could be resolved easy but the radio losses its pre-sets every time the cars shut off too. So my question is "where do the clock AND radio get their consent 12Vs?" I would like to avoid pulling the radio.
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  #2  
Old 12-05-2007, 09:33 PM
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radio/internal light fuse keeps blowing

There is currently some short on the 300d. The radio/interior light fuse keeps blowing, which also takes out my radio. So I wired the the power connector (constant power) directly to the battery. The other power wire is still connected to the ignition. My radio works now and I still need to find out why my fuse keeps blowing.
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  #3  
Old 12-05-2007, 10:59 PM
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Yah, I could do the same if I took out the radio to get to the constant voltage wire, I gota figure how to get to where that comes from if I can
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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  #4  
Old 12-05-2007, 11:28 PM
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Did MB even do that in '77? I remember my '77 P/U that had constant power to the cig ligher only. The radio circuit did not ,since the radio was the standard mechanical push button am/fm stereo. It was neat to watch the knob and dial move with the push buttons.
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  #5  
Old 12-06-2007, 01:32 AM
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Quote:
Originally Posted by rrgrassi View Post
Did MB even do that in '77? I remember my '77 P/U that had constant power to the cig ligher only. The radio circuit did not ,since the radio was the standard mechanical push button am/fm stereo. It was neat to watch the knob and dial move with the push buttons.
Yah, I think so. this is a 78 tho. When I saw the radio had no constant 12V I figured someone forgot to hook up the appropriate wire, then when I saw the clock only worked when the car was going, it stands to reason there is a source for both thats not producing....

I had one of those radios in my old "67"F250, it was AM only
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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  #6  
Old 12-06-2007, 10:23 AM
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I wonder what would happen if I supplied 12Vs (directly from the battery) to the one 12V supply wire to the clock. Would that feed the radio? and what will happen when the car is started? (now juice is coming from two sources) I hate these kind of experiments that could involve smoke and flames
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1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
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