AZNTieN wrote:AJ wrote:Benny wrote:Personally, I always use the battery's contacts, as you get the very best connection that way. Using a part of the body for the earth, or negative polarity, can often lead to a decrease in power as many body parts are rubber mounted or the contact is poor, especially if the part is painted.
Mounting the leads directly will always mean there is much less chance of any drop in current or volatage.
Just my 2c worth.
X2
x erh 3?
x4 until the 1990s, then with ECUs & electronic ignition becoming more popular, advice on such systems was not to earth to battery as you could potentially damage ignition system.