Weird thing happened after 3g install help

[mob]

Alright well I did everything perfect following Jrichkers diagram. I spliced the small wire in the power harness to the stator wire. I plugged in the smaller harness. Ran a 4g power cable to the alternator/battery side of the solenoid with a 125amp fuse in between. I also have a 4g ground from the engine. And I DID NOT put the negative on the positive and the positive on the negative so please dont say it.

I went to go connect the battery cables and when I put the ground on it was a big spark show. Not like the normal couple sparks that happen sometimes, but like alot of sparks, and it melted the top of the battery terminal. I am guessing this is not normal? Any ideas? Please help trying to get this car running.

The car ran fine just before the install. I dont have any amps or audio equipment besides a cd player, but I have a 2g positive cable running from the back to front. Should I get a 2g ground cable for the batter? I wonder why it didnt make a difference before. I didnt even try to start it I just touched it and it sparked up real bad and the terminal melted to the post.

 

[86turbo]

wow that's crazy. Do you have a multimeter? Check the resistance of your pos cable and the chassis of the car. If you are certain you were connecting to the pos side of the battery....

Drew

 

[mob]

No I dont have a multimeter but I really need to get one.

I looked at all the connections again and realised the that the positive terminal connecting to the back of the alternator was just bearly touching the alternator case. Obviously thats a big problem but why did it do what it did? Wouldnt it have sparked when I put on the positive cable not the ground? Because the alternator power wire goes to the solenoid, and so does the battery cable, and both cables would be touching. So if the alternator power cable is grounded to the alternator (which is grounded to the chassis) wouldnt the battery cable also be grounded to the chassis, along with all other wires connected to the solenoid? So wouldnt it have sparked when I put the positive terminal on? Or does just not start floowing through the line until the battery is grounded? That would make more sense. I hope I didnt short and thing or blow my 10 dollar fuse. I'll have to check tomorrow, it is too dark to work now.

 

[HISSIN50]

Glad you found it. That was going to be my first guess just because the receiver stud on 3G's is a bit recessed and larger lugs can short out.

Yes, you do need the negative battery terminal connected to complete the circuit.

 

[mob]

Thanks hissin that makes more sense.