92 losing clock and radio memory after sitting overnight (1 Viewer)
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My 92 does the same thing, but only if I let it sit for about a week and then crank it for a few seconds longer. The battery in mine is weak, though.
I suspect that there's a large capacitor inside the clock module that has failed some years ago. Thus, instead of holding the memory for 30 seconds or whatever, it can only hold on for 2-3 seconds.
I suspect that there's a large capacitor inside the clock module that has failed some years ago. Thus, instead of holding the memory for 30 seconds or whatever, it can only hold on for 2-3 seconds.
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- #3
Well my radio is a double DIN unit and it has a constant 12 volt go into it so it's not the radio its the Supply Power
The same capacitor inside the clock could also power the "memory" circuit inside the radio. If it only happens overnight you have a voltage sagging down or the clock+radio are defective.
Constant power to the clock/radio is from the dome fuse. Do your dome lights work?
This happened to me and it was the battery. It still started fine. The radio was the only symptom.
My guess is that the clock memory circuit requires a relatively healthy voltage (maybe 12.2 volts or something) to keep 'ticking' and even if the battery can put out the CA at a lower voltage it is still not sufficient.
@sea bass, have you measured the battery voltage? I know you say it is good, but what is the voltage?
@sea bass, have you measured the battery voltage? I know you say it is good, but what is the voltage?
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- #9
Yes my dome lts work ok ,im going over all connections
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- #10
My volyage with ignition off is 12.4 v
Are you turning the radio on before you start it? I thought at first mine was losing memory overnight, but it was actually happening when I started it. If I turned on the radio before starting the car, it was fine. After I started the car, the radio presets were gone. I think the battery was just a little weak, so when you started the car, there wasn't enough juice to preserve radio presets.
Yeah my dome light circuit was acting up on mine too. Kept killin my clock and radio memory. I think I am gonna switch to LEDs and wire the radio memory and switched 12v direct to the battery. Since I will be running stuff to stick a CB in there anyway. This way I can isolate and trace dome issues. These issues did happen right now that we have been having lots of rain in Los Angeles so I figured something must have shorted out.
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- #13
No my radio is off when i start it im still going over all connections trying to track it down
Hmm. Interesting. Maybe run a jumper from the battery to the contant 12v on the radio and let it sit overnight. If it still does it then it's the radio?
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- #15
But that wouldn't explain the clock
Good point.
