Yeah its gone...got it checked by the workshop engineer & fault was with Silencer.
It had a leakage at the end part of silencer (muffler) & water was going inside it & thus choking the exhaust system.
Got it welded for the moment but solution is to replace the assembly.
Get the wiring checked first towards the left side as you have mentioned.
Do not disconnect any thing just veryfy for any loose connection, or wire cut.