Will not crank

[luca]

Hi all,

I need a bit of advice on a problem.

I had a flat battery on my Qashqai. It cranked for 2-3 seconds before giving up. I went and grabbed a known good battery I had and used it with a set of jump cables but now the car refuses to crank at all. No clicking from the starter or dimming of lights. I have dash lights and everything else works as it should.
Any advise on where I should start looking. The key still locks and unlocks the car with the remote.

[calnorth]

Probably the Batt quality (charge capacity) and the jump cables...first.

[luca]

The battery I used was much larger than on the car and known good, just charged. With a good set of heavy jump cables. The car doesn't even attempt to crank. Normally I would expect dash light to dim or something. You turn the key and get the dash lights up, turn the key to start position and nothing, no change at all.

[calnorth]

Isolate the original flat Battery from starting process. Try this:

Disconnect +ve cable from flat Battery. Connect the jump lead +ve to +ve car cable clamp. Jump lead -ve connected to car ground as normal. Take great care here.