Battery Ground question

[JDLogan]

I was wondering if anyone knew why the battery is grounded twice on a 95 240sx. The battery cable comes off the terminal, grounds on the bottom of the batter stand, then goes and grounds off the intake manifold. I have to re-route my ground wire and was wondering if I can just ground it off the intake manifold and by-pass the ground on the battery stand or if it was grounded twice for a certain reason. Thanks

[the head]

basic rule of auto electrical systems you always want a engine and chassis ground from a battery remember the engine sits on rubber isolators so with out having this (or grounding straps) the engine itself is not grounded you can also chain them together (ie batt to chassis to engine) on most systems not sure on the specifics of the s14 though

[HATchTRICK]

It's not grounded twice.
The intake manifold is groundign the whole engine with a nice sized ground wire.

The grounjd wire coming off the battery to the tray is grounding the rest of the car.

The motor has it's own seperate ground wire due to the fact that moutor is floating on rubber motor mounts and not securely mounted to the frame.

[SirWarrior]

if you need to reroute the wiring, run one wire from battery to chassis and one from motor to chassis

[ledzeppelin240]

Yeah its the battery to engine and then from engine to chassis. Thats what is done most of the time. But another ground to the chassis does not hurt anything, if anything the 240's don't have enough grounds to begin with.