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In a vehicle it's chassis ground, or common return. There is no earth common in a vehicle. You will have people thinking of house wiring. Every component on a vehicle must have a good chassis ground to make the connection back to the battery, which makes the chassis a common return. In a house with earth ground, you can technically run a ground stake into the earth and have a circuit work.


Aware of that (earth return).

My point is most ppl tend to ignore the earth connections between the battery and chassis/body/engine, when it needs to be as "good" as the positive 12v side of it. Corrosion is a biatch....

Jumper lead between batt -ve and chassis/body and one between batt -ve and engine with good clean healthy sized contact points and bypassing the existing earth wiring. If it is still sluggish on the starter I would be getting the battery tested.

Most ppl ahve a set of jumper leads in their kit and this is a zero cost way of eliminating or confirming the problem before spending any money.

2002 Sporty , Ironman 2.5" spring, 2" body, 15 x 7 ROH wheels, K&N, 15 x 10.5 Simex Centipedes, Powerchip 91.

"Never argue with an idiot. They will bring you down to their level then beat you with experience!"