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Battery indicator shoots up to overcharge on dash


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I did big three and lights are dimming on dash and headlights are dimming bad at night

I had battery and alternator checked both showed fine

Im guessing the load on the alternator is too much and I purchased a new XS battery

Havent changed the alternator or replaced battery yet

Today driving down the road my battery indicator on my dash shot all the way up to the over charge side.

I pulled over and shut my truck down.

Checked all my wires and everything looks good and tight

Started my truck turned off all my equipment and gauge read fine again

put volt meter on my battery and im getting 13.97 volts slightly less than the 14.28-14.36 I usually get.

Is my alternator on the way out?

I have a blinker light that is out and is constantly shorting on my dash.

It will show light out then go off then show light out back and forth real fast.

Could this short be causing problems?

Or is my alternator just on the way out?

I keep getting terrible blue corrosion on the negative terminal which I read can be due to an undercharging situation.

I clean all the cables and two or three days later the corrsion is back. Even snows over the dielectric grease that covers everything

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if your alternator is charging from 13.9 to 14.4 like you just said it does, that is 100% normal. As for the volt meter shooting higher than that, you might have a different problem. Are you able to monitor your voltage while driving to see how high you actually get it to go?


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What kind of vehicle do you have?

Some newer vehicles monitor the current draw though the ground cable (newer GMs are good for this).

When users do the big 3 upgrade and remove those stock wires and replace them with new larger wires and bypass the clamp that is used for the vehicle to monitor the charge they will experience similar types of issues.

 

 

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What kind of vehicle do you have?

Some newer vehicles monitor the current draw though the ground cable (newer GMs are good for this).

When users do the big 3 upgrade and remove those stock wires and replace them with new larger wires and bypass the clamp that is used for the vehicle to monitor the charge they will experience similar types of issues.

yup

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Replace your stock wires back along with the big3.

http://www.stevemeadedesigns.com/board/garage/vehicle/2438-jeep-commander/


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I left all the original wires along with adding the big three

the truck is an 06 dodge ram 1500

stock 136 amp alternator

battery is Interstate 975 cca 65ah battery is 4 years old

I am running 1500 watts rms

1000 rms to subs at 2 ohms

500 rms at 2 ohms to highs and mids

I have no way of monitoring voltage other than a volt meter connected to positive and negative of amps and the factory dash indicator.

the dash indicator dips way below the half way mark and shows low charging when at idle or during heavy bass

When I have stereo playing I am getting terrible voltage drop. All the way into the 10.7 volts

It does charge at 14 volts when idling with no music on.

Low volume music it drops to 13.7 volts.

During big low bass tracks in the 35hz or lower region, at 3/4 volume, I get severe voltage drop into the 10 volts region and the subs clip and lose all clarity.

My gains are set at 1/3 of the way up and bass boost is on zero

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I dont see how Icould be clipping. THe subs only clip due to the voltage drop. When I installed the amp and one sub was running at 4 ohms my gains were set with a DD-1.

Now that I have added another sub and dropped down to 2 ohms my gains have not changed and I am getting severe voltage drop.

I dont have access to the DD-1 until after christmas holidays. so no way of checking gains.

I still dont see my gains being too high because my amp is turned way down

any lower and my subs are practically making no bass at all. Ive turned the gains down and I get less voltage drop but its because I literally have no bass at that point

Will clipping cause severe voltage drop???

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