Battery Question

Post by **Merlin** » Mon Feb 11, 2013 3:37 pm

^^ Fry your ECU

Thinking about it again, how much different is this to a dead battery. You jump a dead battery and the car recharges it.

Post by **4thgenphil** » Mon Feb 11, 2013 3:38 pm

NafemanNathan wrote:I'm trying to think what cables are attached to the negative now

Try it!

to the chassis, all that matters really!

Post by **NafemanNathan** » Mon Feb 11, 2013 3:45 pm

4thgenphil wrote:
NafemanNathan wrote:I'm trying to think what cables are attached to the negative now

Try it!
to the chassis, all that matters really!

Yeah. but again that earth goes back to the battery negative in order to complete the circuit which runs through the battery (the power source). You're removing the power source by disconnecting it.

You're right though Merl, you shouldn't cause any damage by disconnecting it.

stk prelude · Post by **stk prelude** » Mon Feb 11, 2013 3:46 pm

well i used to have a loose negative .. used to mess my gauges up...( oil and temp) giving me fouls reading.. but she still ran

Post by **NafemanNathan** » Mon Feb 11, 2013 3:54 pm

That could have just been down to the gauges being overly sensitive. Were they digital?

Someone's got to try it then!

Post by **4thgenphil** » Mon Feb 11, 2013 4:02 pm

NafemanNathan wrote:
4thgenphil wrote:
NafemanNathan wrote:I'm trying to think what cables are attached to the negative now

Try it!
to the chassis, all that matters really!
Yeah. but again that earth goes back to the battery negative in order to complete the circuit which runs through the battery (the power source). You're removing the power source by disconnecting it.

surely the alternator is the power source when its running?!

LewisH · Post by **LewisH** » Mon Feb 11, 2013 4:05 pm

My megane i had ran with the + terminal disconnected for 70-odd miles. Its when you turn the car OFF, is when you have issues, or youre not doing a constant speed.

Post by **NafemanNathan** » Mon Feb 11, 2013 4:17 pm

4thgenphil wrote:
NafemanNathan wrote:
4thgenphil wrote:
NafemanNathan wrote:I'm trying to think what cables are attached to the negative now

Try it!
to the chassis, all that matters really!
Yeah. but again that earth goes back to the battery negative in order to complete the circuit which runs through the battery (the power source). You're removing the power source by disconnecting it.

surely the alternator is the power source when its running?!

That's why I was trying to think of where the second lead on the negative terminal goes. Obviously the alternator tracks back to the battery and that's why the primary circuit is broken, but is there a secondary circuit to keep it alive. With my battery relocation and wire tuck I should really know, but it's messed me all up!

... Plus I've got a headache

leefentonsheard · Post by **leefentonsheard** » Mon Feb 11, 2013 4:50 pm

what a set of retards its your alternator that keeps your car running not the battery the battery is just used to start a car hahahaha loving all the advise u have been given hahaha

Post by **4thgenphil** » Mon Feb 11, 2013 4:52 pm

leefentonsheard wrote:what a set of retards its your alternator that keeps your car running not the battery the battery is just used to start a car hahahaha loving all the advise u have been given hahaha

i like you!