need help with toad battery disconnect

j-d wrote:
You're less likely to have a "battery accident" working on the negative side since it's grounded to the vehicle body. That's why we disconnect the negative cable first and keep it away from the battery terminal. Then, if the wrench on the positive touches the body, nothing shorts out since the body is no longer negative.

klutchdust wrote:

Hank MI wrote:

klutchdust wrote:

Hank MI wrote:

klutchdust wrote:
I wouldn't use the positive side as a disconnect it may arc unless you remove the ground wire first. With todays sensitive electronics it may matter.

When installing a battery or jump starting a vehicle always install the positive side first then the ground, this will eliminate arcing. If finished jump starting or removing a battery always remove the ground first , this will eliminate arcing.

Really? If there's a voltage potential, a complete circuit, then there's a possibility of arcing. What makes you think that the negative cable and negative post on the battery can't create an arc? The electrons don't care where you complete the circuit.

You remove the negative cable first because you're using a wrench to loosen the cables. If you hit a metal part of the car with the wrench while loosening the cable, no harm, the car is grounded to the negative. If you remove the positive first and touch a metal part of the car you create a short circuit through the wrench, not good.

When jump starting a car you hook the positive cable to the battery first. No arcing because the negative cable isn't hooked up, not a complete circuit. You then hook the negative cable to a metal part of the car or engine not the battery. If it does cause an arc it's not near the battery and unlikely to ignite any gases coming from the it.

.


What's your point?

Point, either cable is just as likely to arc when connecting or disconnecting. You seem to be saying only the positive cable can arc and that's just not true.

My response was a general rule statement used in the automotive and trucking industry. Yours is based on a remote possibility not often experienced. Sure it could arc but less likely.

Hank MI wrote:

klutchdust wrote:

Hank MI wrote:

klutchdust wrote:
I wouldn't use the positive side as a disconnect it may arc unless you remove the ground wire first. With todays sensitive electronics it may matter.

When installing a battery or jump starting a vehicle always install the positive side first then the ground, this will eliminate arcing. If finished jump starting or removing a battery always remove the ground first , this will eliminate arcing.

Really? If there's a voltage potential, a complete circuit, then there's a possibility of arcing. What makes you think that the negative cable and negative post on the battery can't create an arc? The electrons don't care where you complete the circuit.

You remove the negative cable first because you're using a wrench to loosen the cables. If you hit a metal part of the car with the wrench while loosening the cable, no harm, the car is grounded to the negative. If you remove the positive first and touch a metal part of the car you create a short circuit through the wrench, not good.

When jump starting a car you hook the positive cable to the battery first. No arcing because the negative cable isn't hooked up, not a complete circuit. You then hook the negative cable to a metal part of the car or engine not the battery. If it does cause an arc it's not near the battery and unlikely to ignite any gases coming from the it.

.


What's your point?

Point, either cable is just as likely to arc when connecting or disconnecting. You seem to be saying only the positive cable can arc and that's just not true.

klutchdust wrote:

Hank MI wrote:

klutchdust wrote:
I wouldn't use the positive side as a disconnect it may arc unless you remove the ground wire first. With todays sensitive electronics it may matter.

When installing a battery or jump starting a vehicle always install the positive side first then the ground, this will eliminate arcing. If finished jump starting or removing a battery always remove the ground first , this will eliminate arcing.

Really? If there's a voltage potential, a complete circuit, then there's a possibility of arcing. What makes you think that the negative cable and negative post on the battery can't create an arc? The electrons don't care where you complete the circuit.

You remove the negative cable first because you're using a wrench to loosen the cables. If you hit a metal part of the car with the wrench while loosening the cable, no harm, the car is grounded to the negative. If you remove the positive first and touch a metal part of the car you create a short circuit through the wrench, not good.

When jump starting a car you hook the positive cable to the battery first. No arcing because the negative cable isn't hooked up, not a complete circuit. You then hook the negative cable to a metal part of the car or engine not the battery. If it does cause an arc it's not near the battery and unlikely to ignite any gases coming from the it.

.


What's your point?

klutchdust wrote:

rk911 wrote:

klutchdust wrote:

Thunder Mountain wrote:
Why do you want to disconnect the battery? Not required for Jeep Wrangler.

I pull the main fuse yet there are dash lights still on because I have to turn my key to allow the wheels to turn.

your steering wheel locks when the key is removed???

Yes ,2008 JK.

rk911 wrote:

klutchdust wrote:

Thunder Mountain wrote:
Why do you want to disconnect the battery? Not required for Jeep Wrangler.

I pull the main fuse yet there are dash lights still on because I have to turn my key to allow the wheels to turn.

your steering wheel locks when the key is removed???

Hank MI wrote:

klutchdust wrote:
I wouldn't use the positive side as a disconnect it may arc unless you remove the ground wire first. With todays sensitive electronics it may matter.

When installing a battery or jump starting a vehicle always install the positive side first then the ground, this will eliminate arcing. If finished jump starting or removing a battery always remove the ground first , this will eliminate arcing.

Really? If there's a voltage potential, a complete circuit, then there's a possibility of arcing. What makes you think that the negative cable and negative post on the battery can't create an arc? The electrons don't care where you complete the circuit.

You remove the negative cable first because you're using a wrench to loosen the cables. If you hit a metal part of the car with the wrench while loosening the cable, no harm, the car is grounded to the negative. If you remove the positive first and touch a metal part of the car you create a short circuit through the wrench, not good.

When jump starting a car you hook the positive cable to the battery first. No arcing because the negative cable isn't hooked up, not a complete circuit. You then hook the negative cable to a metal part of the car or engine not the battery. If it does cause an arc it's not near the battery and unlikely to ignite any gases coming from the it.