Battery/ Electrical question?

[max 02]

Just replaced the batteries in my 02 Duramax this morning.

So when I was hooking them up...I put the positive on both batteries, then went back and put the negative lead on one of the batteries. But it sparked when I installed it.

Went and put the other negative lead on the other battery. No spark when I did that.

Does that mean I have a draw somewhere.

 

[rampage]

Yes, the ECM and radio will draw power when first hooked up. It'll make a small spark but nothing to worry about.

 

[max 02]

Good news. Just making sure.
Thanks!

 

[chulisohombre]

Anything you have that runs a continuous power like radio ECM and clock will draw a few amps even off just Connecting The battery. It's normal to get a small one.

 

[jekquistk5]

Passenger side battery goes directly to the starter. Drivers side goes to the electronics. So did the passenger not spark, and the drivers spark? If so thats normal.

 

[Russell]

If you wanna get all teknikal and stuff grab a NEER or two and a multemeter or other current indicatin' device then see what ya'll got for milimeter ampimeters after the truck has had the battries huked up fer a bit

50mA er less n you're golden!

 

[max 02]

Passenger side battery goes directly to the starter. Drivers side goes to the electronics. So did the passenger not spark, and the drivers spark? If so thats normal.

I hooked up the pass side first. That's the one that sparked.
The drivers side was still disconnected.

 

[max 02]

If you wanna get all teknikal and stuff grab a NEER or two and a multemeter or other current indicatin' device then see what ya'll got for milimeter ampimeters after the truck has had the battries huked up fer a bit

50mA er less n you're golden!

Don't got a mutineer thing.
Should have one but I would know how to use it.

Wow spell check! I meant multimeter.