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Disabling Stereo memory

Old 04-19-2007, 08:23 PM
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Default Disabling Stereo memory

I've recently installed a Jensen MXM4425G stereo on my boat and found that it constantly draws power. I'm assuming it has some kind of memory engaged that is using power from the battery. Anyone know how to disable that?

Thanks in advance...
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Old 04-19-2007, 08:27 PM
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Default Re: Disabling Stereo memory

Radios usually have both a switched and unswitched positive lead. The unswitched lead maintains constant power for the clock and the radio station pre-sets. If you don't want those features, connect the unswitched lead to the switched power source and the radio will not draw power. You just can't use the clock or the pre-sets. If both leads are not connected, the radio will not work properly.
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Old 04-19-2007, 08:35 PM
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Default Re: Disabling Stereo memory

why ? the draw a stereo takes to hold it's memeory is very insignificant - maybe if you were storing for 6 months without a charger but not with any type of regular use...
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Old 04-19-2007, 09:14 PM
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Default Re: Disabling Stereo memory

Thanks sea six.

Glen - If I forget to turn off the battery switch - dead battery in a week.
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Old 04-19-2007, 09:16 PM
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Default Re: Disabling Stereo memory

ryanc2 - 4/19/2007 10:14 PM

Thanks sea six.

Glen - If I forget to turn off the battery switch - dead battery in a week.
that's not the radio doing that.....
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Old 04-19-2007, 09:17 PM
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Default Re: Disabling Stereo memory

the yellow wire is the memory power lead
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Old 04-19-2007, 09:47 PM
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Default Re: Disabling Stereo memory

Glen E - 4/19/2007 9:16 PM

ryanc2 - 4/19/2007 10:14 PM

Thanks sea six.

Glen - If I forget to turn off the battery switch - dead battery in a week.
that's not the radio doing that.....
I agree with Glen. There is another device causing the kill.

FWIW, I measure 10mAmps for the clock on my last Jensen.
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Old 04-19-2007, 09:49 PM
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Default Re: Disabling Stereo memory

Glen E - 4/19/2007 9:16 PM

ryanc2 - 4/19/2007 10:14 PM

Thanks sea six.

Glen - If I forget to turn off the battery switch - dead battery in a week.
that's not the radio doing that.....
agreed. What other electronics are on the boat? Some navigation electronics remain powered even if the unit is off. I just recently found this out the hard way (dead house battery from the GPS sensor and sounder module remaining powered from the network switch)

or it could be from a multitude of other accessories that may have a short or a current draw. Or, how old are the batteries? and are they holding a charge?
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Old 04-19-2007, 10:39 PM
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Default Re: Disabling Stereo memory

are you sure the boat is not leaking? Most bilge pump auto sides are wired direct to the batteries. even if it's not a seawater leak, you might have a leaky hatch or busted scupper that is pouring rain water into the bilge.

A radio memory leg should not kill your battery in a week.
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Old 04-20-2007, 11:01 AM
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Default Re: Disabling Stereo memory



get a mulitmeter that has an ampere setting. disconnect your positive battery lead and put the meter in line on the battery post and power cable. if you have a current draw with the radio disconnected, then it wasnt the radio causing the problem.

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Old 04-20-2007, 11:33 AM
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Default Re: Disabling Stereo memory

On new BW Dauntless with Clarion stereo, I was troubleshooting inoperative auto bilge pump, and discovered the stereo memory power (unswitched) and bilge pump leads both went to a press-fit lug in a box inside starboard stern hatch. Lug had gotten pulled off, no strain relief. I decided to hook it back up the same way. Now, if the stereo wont work, I know the bilge pump got disconnected again, too. It shouldnt, again, but who knows. Stuff happens.
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Old 04-20-2007, 12:09 PM
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Default Re: Disabling Stereo memory

It will take YEAR for your stereo memory to drain the battery down. Do you disconnect your Car and truck stereo memory wires when you go on vacation for 2 weeks? Were they dead when you returned? The same will go for yu boats, car stereo.

Find out where your drain is!! And Bilge pump/leak is ussuallly the 1st culprint.
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Old 04-23-2007, 10:04 PM
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Default Re: Disabling Stereo memory

Thanks for all of the info - still trying to diagnose the problem. I wouldn't think the memory on the stereo would be the problem, but others seem to have the same problem after installing this rig. Someone else mentioned the bilge possibly being stuck, so I'm going to look at that as well.

I've also got a GPS and seperate sounder as well as VHF - two new deep cycle batteries between a Perko switch.

I'm a novice here, so I apologize for the ignorant ?'s. The other thing is my 4 way switch still allows power draw even when in the off position. Doesn't that work as a emergency shut off of all electronics?
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Old 04-24-2007, 09:28 AM
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Default Re: Disabling Stereo memory

ryanc2 - 4/23/2007 10:04 PM

Doesn't that work as a emergency shut off of all electronics?
That depends on how the boat and switch are wired.


My bilge pumps are wired directly to the battery for "auto only" operation. Float switchs are prone to jamming and run the pump until the battery dies.

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Old 04-24-2007, 11:19 AM
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Default Re: Disabling Stereo memory

Yes, it depends on how the switch is wired. If it is wired PROPERLY, ALL power will be disabled when in the off position, with the exception of the Bilge pumps, which should never be shut off for obvios reasons.

I would check the GPS receiver. I see people wiring them up with no switch, thinking it will only be powered up when the Display is powered up. this is not the case with many GPS receivers, they are always powered up regardless of whether the display is on or not.
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Old 04-24-2007, 05:26 PM
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Default Re: Disabling Stereo memory

Are both the red and yellow wires connected directly to the power source?
If so, this is probably your problem.
Your red wire should be on some sort of switch.
If it's on a switch, and the switch is turned off, either you've got a bad radio, or the problem lies somewhere else.
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