guineafowl21
Well-Known Member
Jump starting - once dead car is started, good car's alternator is still driven at full capacity to help charge dead battery. Disconnect the jump leads at this point and in the instant it takes for the good alternator to down-regulate, it produces a voltage surge that can fry the good car's electrics.Why do you say that Mike? Are there reasons why its bad for the car/engine?
After hearing of some of the horror stories on here of electric components being fried (on both cars) by jump starting - I'm thinking bump starting is much safer - maybe I should think again
Best practice is to turn off at least the good car before disconnecting the jump leads.
AFAIK, this won't apply to bump starting, which is a handy thing to be able to do if your wife leaves the headlights on and drains the battery...