Help My V35 Won't Start

[v35 coupe]

Hi i left my v35 for holiday for a month and i forgot to disconnect the battery. and when i got back it died.

after i jump start the car my alarm sound suddenly not working now and most of the time when i left the car and use it the next morning it wont start again not because of the battery. I have to disconnect the Positive(+) battery and wait for couples of second and connect it again then its working again.

So my best guess is the immobiliser or alarm system? any idea how to fix?

[ka86]

I hope you don't mean you are disconnecting your Positive Terminal first? You can cause sparking/shorting out if you do.

[sonicii]

I hope you don't mean you are disconnecting your Positive Terminal first? You can cause sparking/shorting out if you do.

??? there is absolutly no electrical difference between disconnecting the +ve or -ve terminal first.

If I need to disconnect the battery to do any work on my car, I usually disconnect the negative terminal for the sole reason of safety. If I disconnect the Positive terminal, it leaves the positive terminal on the battery exposed, so if I accidently drop a spanner between the exposed positive battery terminal and any other metal surface in the engine bay, it will short out the battery and can damage it, or other components.. and at worst, cause the battery to quickly overheat and explode.

By removing the negative terminal, it leaves positive terminal covered with the plastic guard, but even if it didn't have any plastic guard, it also isolates the metal frame of the car from negative side of the battery, so dropping a spanner between the positive terminal and the metal of the car, won't cause a problem.

[ka86]

Pretty much what you said.

I was referring to safety.

:-)