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Unread 07-28-2011, 11:03 PM   #1
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Default Looking for electrical opinions/suggestions

I bought my precedent a few weeks ago and installed lights and radio before heading to the beach. I wired the lights and radio to #4 battery, I know its not the best but I was being wishy washy about a separate battery or voltage reducer. First night at the beach I noticed when accelerating hard from a stop, the radio would shut off. As the battery got weaker, any input to the accelerator would shut off the radio. Very annoying. The next day, I installed a curtis voltage meter to monitor voltage and see just how weak the batteries were getting before the radio started cuttting out. Two bars down and the radio was cutting out consistently.

I knew in order to fix the problem, I had to decide between the extra battery or the voltage reducer. Being at the beach with limited tools I decided to install the reducer. I bought a 25 amp reducer to power the lights as well as the radio. I wired the 48volt input from the key switch and ran the ground to the ground wire behind the dash panel. The lights and radio are wired to the 12volt output from the reducer. I still have the same problem except the radio starts shutting off when the batteries are approx. 50% discharged.

Is this normal? I didn't expect the voltage would drop enough to shut the radio off especially after installing the reducer. Is there anything I can do short of installing extra batteries. I would like to make the reducer work since I already bought it. Any help you can provide will be greatly appreciated!

Mark
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Unread 07-29-2011, 04:36 AM   #2
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Default Re: Looking for electrical opinions/suggestions

i think you are likely trying to pull too much current through the factory key switch and wiring. you can use a relay or contactor to carry the load and trigger the contactor/relay from the key switch. a fused 10 or 12awg from the batteries to the reducer/contactor/relay should be sufficient.
-sj
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Unread 07-29-2011, 07:57 AM   #3
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Default Re: Looking for electrical opinions/suggestions

thats a problem alot of people have with the radio ( cutting out ) there are a few members here who have figured it out but i don,t think the extra battery is the fix..........i think it might be more the location of the radio.......there are enough members here with radios i,m sure they,ll share.............................
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Unread 07-30-2011, 02:43 PM   #4
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Default Re: Looking for electrical opinions/suggestions

Thanks for the replies, I was wondering about the key switch. Will be going to a relay very soon. Maybe some other people can chime in who has had this problem and how they fixed it.

Mark
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Unread 07-30-2011, 03:59 PM   #5
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Default Re: Looking for electrical opinions/suggestions

48 volt input should be at the battery pack, not the key switch.
only thing you could use the key switch for is if your reducer has an activation wire.
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Unread 07-30-2011, 04:01 PM   #6
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Default Re: Looking for electrical opinions/suggestions

like this one
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Unread 07-30-2011, 05:28 PM   #7
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Default Re: Looking for electrical opinions/suggestions

Easy fix just add a carstereo capacator in line will end any voltage drop issues with stereo
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Unread 07-30-2011, 05:39 PM   #8
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Default Re: Looking for electrical opinions/suggestions

Quote:
Originally Posted by wizzardcarts View Post
Easy fix just add a carstereo capacator in line will end any voltage drop issues with stereo
Yes, that will fix the cutting out problem, but the reducer needs to be wired correctly. As stated above, you are trying to pull too many amps off a curcuit not designed to handle that much amperage.
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Unread 07-31-2011, 04:07 PM   #9
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Default Re: Looking for electrical opinions/suggestions

here is a way to use a relay off the key switch this uses the same relay used in the charger less than $5.00
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Unread 08-02-2011, 02:02 AM   #10
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Default Re: Looking for electrical opinions/suggestions

Thanks guys, will be wiring the reducer straight off the battery and use a relay powered from the key switch to turn on and off the reducer. I replaced my stock key switch with a higher rated switch before wiring the reducer to it. I hope coming straight off the batteries will solve my problem. The reducer I bought is a 4 wire reducer with no enable wire.

Mark
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