‘97 C2500 Dual Battery Set Up

Seymorey · Wednesday at 2:14 PM

Cadillacmak said:
Aux B stud is trailer wiring from factory, Aux A stud is for what ever you want. Its not clear on the Aux Batt post so I am assuming it goes on the normal batt post on the side. The Hot run is just a brown wire coming off fuse #24 inside fuse box via the ignition. When ignition is on its hot. Hopefully you can find that brown wire under the hood and just plug back in.

I don’t see a brown wire or a fuse numbered 24:

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That diagram also says fuse 24 and “4WD”.

Hot in run wouldn’t be the bolt on the upper left hand side of the fuse box, would it?

Cadillacmak · Wednesday at 2:20 PM

Inside fuse box #24.
No, the hot in run should be a brown wire coming out of your cab. Look around and see if it is cut short or used for something else.

Seymorey · Wednesday at 3:31 PM

Cadillacmak said:
Inside fuse box #24.
No, the hot in run should be a brown wire coming out of your cab. Look around and see if it is cut short or used for something else.

Got ya.

Fuse 24 is there and not blown.
The only brown wire I can locate in the vicinity is this one:

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And it’s here:

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And appears to be attached to another solenoid of some sort.

From there, it runs to this white box:

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But I can’t see much down there because the wires are in the way.

Cadillacmak · Wednesday at 3:45 PM

That doesn't look like factory routing so it most likely got used for something else. You can tap into it and run a wire to the factory solenoid. Just check and make sure its a hot when key on wire.

Seymorey · Wednesday at 4:20 PM

Cadillacmak said:
That doesn't look like factory routing so it most likely got used for something else. You can tap into it and run a wire to the factory solenoid. Just check and make sure its a hot when key on wire.

To tap into it is as simple as adding another connector to the same bolt it’s on, yeah? Or will I have to splice a splitter on to it?

Cadillacmak · Wednesday at 4:26 PM

Seymorey said:
To tap into it is as simple as adding another connector to the same bolt it’s on, yeah? Or will I have to splice a splitter on to it?

Either one will work. Solenoid coils take a very small amount of amps.

Minn95Dually · 2024-09-16T12:08:00-0400

Seymorey said:
Hey guys,

My ‘97 C2500 came from the factory with a dual battery set up to power accessories. The previous owner bought new batteries, started experiencing electrical issues right afterwards and proceeded to delete the secondary battery in a futile attempt to stop the issues he was experiencing from a bad-from-the-factory battery cell.

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This is what I’m working with. I’m an electrical idiot but would like to make this truck a hauler again. I believe most of it is still left, except for the battery cable. The trailer power and electronic break wires are still there and, I believe, intact and run to the rear of the truck still.

Anyone with more of an electrical aptitude care to shed some light on what it is I am working with here? I can’t find any other pictures of this particular set up so I have no idea where I’m supposed to start here.

Where does that orange wire go to?

Seymorey · 2024-09-16T12:23:57-0400

Minn95Dually said:
Where does that orange wire go to?

To the back of the truck. It’s in the same wire bunch as the trailer wiring harness but is not connected to anything.

‘97 C2500 Dual Battery Set Up

Seymorey

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Cadillacmak

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Seymorey

Newbie

Cadillacmak

I'm Awesome

Seymorey

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Cadillacmak

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Seymorey

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