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Did Battery Relocation, overcharging at 15v idle!!!

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Did Battery Relocation, overcharging at 15v idle!!!

 
Old 10-14-2018, 09:21 PM
  #1  
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Default Did Battery Relocation, overcharging at 15v idle!!!

I did a battery relocation to the passenger side trunk area, I used 1 gauge welders wire from battery to engine bay to a junction box.
I ran a 1 gauge wire to the starter solenoid from the junction box.
i ran a 2 gauge wire to the alternator from the same junction box.

Now when i start the car I get an annoying "check alternator" message on my dash and it chimes every so often.
So I go check my battery with engine off, I get around 12v.. looks normal to me
I check again but with car started and I get a whopping 15.4v while idling and almost 16v if revved.

Im afraid I might burn something in my ecu or wiring. I drove home, about 3 miles from where I was at and didn't have any drivability issues, Just that annoying "check alternator" chime and message.

Perhaps i used too big of wire on my alternator?


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Old 10-15-2018, 09:06 AM
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Really canít go too big when it comes to wiring, Iíd pull the alternator and have it checked
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Old 10-15-2018, 09:12 AM
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Also, you didnít mention anything about the ground wire
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Old 10-15-2018, 09:48 AM
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2/0 AWG wire is recommended for the run from the battery to the starter. Minimum of 0 AWG. Current will drop over the length of the cable. 20ft of 2 AWG cannot handle the same load as 5ft of 2 AWG. So you have to make up for it with a thicker gauge cable, which is the reason for the recommendation of 2/0 AWG.

You also need to tie the battery's negative terminal to chassis and the engine block to chassis with the same size cabling.
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Old 10-15-2018, 09:53 AM
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Originally Posted by 80/TA/LT1 View Post
Also, you didnít mention anything about the ground wire
yeah thatís one thing I forgot to do, should I add more grounds or run a larger ground wire? Also I just realized I forgot to re connect a white wire that goes to positive. Iím guessing itís the voltage sensor wire which is probably why it says the alternator may be bad. Iíll try re connecting the white wire after work then see if my voltage gets regulated down to a normal 12v to 14v.
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Old 10-15-2018, 11:48 AM
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You absolutely need to connect that wire. That's why the alternator is running amok.
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Old 10-15-2018, 11:56 AM
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Originally Posted by MuhThugga View Post
You absolutely need to connect that wire. That's why the alternator is running amok.
Ok will do after I get out of work. Do you think the battery voltage while running will correct itself once the wire is re connected? Iím hope itís all that itl need. will definitely run a couple more grounds while Iím in there.
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Old 10-15-2018, 12:13 PM
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I could only be so lucky to get over 13v.....even with a 400A alt and 2 batteries😡 voltage still thanks when the bass drops
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Old 10-16-2018, 05:09 PM
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Originally Posted by Javi7808 View Post


Ok will do after I get out of work. Do you think the battery voltage while running will correct itself once the wire is re connected? Iím hope itís all that itl need. will definitely run a couple more grounds while Iím in there.
It should fix things. Right now, there is no voltage detection to regulate the alternator output.
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Old 10-17-2018, 10:26 PM
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Originally Posted by MuhThugga View Post
It should fix things. Right now, there is no voltage detection to regulate the alternator output.

whoooo! its all back to normal! no more chime and high voltage. am at 14v now, i guess it was that white wire.
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