Help! Battery sparks like crazy

[Locsteros22]

Thanks for slapping my dumb face!! Your my savior! Now to get busy

[Locsteros22]

Ok I narrowed it down to the A wire..could thr wire be too old? Since my new alt tested good?

[ggzilla]

Nope, the wire can't be too old. That would not cause sparking. Shorting would cause it, but that does not occur due to age.

 

Is this wire White with Black stripe?

 

First, test the wire. With wire disconnected from alternator:

* Verify read 12V on this wire (other end of voltmeter on battery NEG terminal)

* Confirm it is not shorted. Put red lead of voltmeter on battery POS terminal, black lead to this wire. It should read 0V

 

If the reading is incorrect, trace the whole length of that wire. It is supposed to go directly to the Fusible Link. It's wrapped in the wiring harness, so inspect that portion of the harness for cuts/alterations/damage. Find the other end of the wire. Where is it connected to?

[Locsteros22]

Yeah my wire harness isn't wrapped all the wires are loose..and the A wire is all red I think it's a 10 gauge wire and it's connected to the fusible link...I'm going to test the wire tomorrow and get back to you thanks for your help!

[Locsteros22]

Ok so I got a chance of sunshine today and checked my wires and the neg to wire reads 12.3 volts and posi to wire reads 0...and I traced the wire it goes from alt to fusible link to ignition switch. Any other stuff I should try out? I've been cleaning out whatever wires I don't really need to make it easier for myself haha

[ggzilla]

Does that sound correct?

 

* neg reads 12.3 v

* posi reads 0

 

Sounds like the wires are switched. Maybe the battery is installed backwards. Sometime people use a Red battery cable for negative.

[Locsteros22]

Haha I'm sure the wires aren't switched I'm not that of a noob hahah but it was just like u said black lead in neg and red on alt wire it should read 12v right ? Unless I misunderstood ya haha sorry

[ggzilla]

Connect the voltmeter to the battery POS terminal and the ALT BAT wire. It should read 12V

Connect the voltmeter to the battery NEG terminal and the ALT E wire. It should read 12V

 

If that's what you find, connect those two wires to the alternator. But don't connect the T-connector yet. If there are no sparks, then try the T-connector. You gotta narrow it down. Exactly what is sparking?

[Locsteros22]

Well it's the battery wire for thr alt that is sparking

[banzai510(hainz)]

Isnt the bat wire the same as the +output post of the alternator(red white wire). then goes to the fusable link lug at the starter which be same as the battery cable when hooked up.

 

 

so your saying when you hook up the red white wire to the + threaded post where the 8mm nut hold the wire on the alternator, its sparks?

[Locsteros22]

Yes! Haha but the wire isn't white red since all wiring been replaced...I can't think of anything else can be wrong people I know say something is touching ground but I highly doubt that is true

[banzai510(hainz)]

well is the alternator insulation on the post good.There should be plastic or something like that on it to keep the post frpm shorting out.

I would put a meter on the alternator + post( threadedoutput) and touch the case and see if you get a short or close to a short.

[D52E]

Perhaps it would be beneficial if you posted some good photographs of how you have the wires connected. Maybe a member will have additional helpful suggestions after that.

 

Make sure that any insulating rubber/plastic washer(s) on the battery terminal of the alternator is not missing (causing the heavy gauge positive cable to contact the alternators grounded case).

[ggzilla]

The alternator is bad. Even though the store "tested" it. Could be the insulation on the post, easy to fix, but it's still a bad alternator. Unless you are installing the wire incorrectly.

[Locsteros22]

Yeah it has a red plastic insulation peice with another 8mm bolt on top of that...ok I'll try tha