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Guys, of course this cable is required to start the engine! That's it's purpose. Last I checked, all cars came with one from the factory. If yours was "bad" then replacing it or repairing it is the natural course of action if you'd like for your vehicle to start when you turn the key.

What I'm asking, is why are people slapping another one on a vehicle as part of the "Upgrade" ?

this is not true on my last car i just had a ground from battery to body an it started

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i think its really vehicle dependent on this one. my alt grounds to the engine so upgrading the engine ground would only help the alt ground more. i did the alt to batt positive, batt ground to chassis and engine to chassis. when i can im gonna do a engine to batt ground to.

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basically some cars dont need the engine ground upgraded. the only reason to upgrade the engine ground for a car audio reason would be to if the alt is grounded to the engine.

although i have heard people say they did big 3 upgrades on some of their drag cars because it can give a very slight increase in performance.

t1500bdcp

2 t2d4 15"

1 t600.4

1 t400.2

1 set p1 tweets

singer alt, tons of wiring, smd vm-1, 80prs, back seat delete, still in the works, aiming for a 145-147 with the ability to play 25hz up to 50hz.

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Share on other sites

Guys, of course this cable is required to start the engine! That's it's purpose. Last I checked, all cars came with one from the factory. If yours was "bad" then replacing it or repairing it is the natural course of action if you'd like for your vehicle to start when you turn the key.

What I'm asking, is why are people slapping another one on a vehicle as part of the "Upgrade" ?

this is not true on my last car i just had a ground from battery to body an it started

snafu has published automotive electrical books...thats all im gonna say about that.

Edited by Kranny
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Exactly it isn't necessary, My truck only has one but I have 8 1/0s coming directly off the alternator case(s), if you DON'T run a ground direct from alt case then you have to do this battery neg to block, that provides alt a better ground, but as we know, the best thing to do is go directly to the source, the alt case.

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I ground the frame and upgrade charge line and ground alternator casing

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Wait... Have I had it wrong this whole time? I thought the big three was

Block to ground

Batt negative to ground

Alt charging wire

I didn't know it was block to battery negative :WTFBubble:

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