Rain doesn't hurt the exhaust system. There's normally water inside as a byproduct of the catalytic converter doing its thing. That's why there's often a small drain hole in the back of the muffler, and it's why you often see water dripping from tail pipes. Anything more than that will just blow out when the engine is started.
When it doesn't start, what happens to the brightness of the head lights or dome light? Do they go out, get dim, or stay bright? If you get a single click and the lights go out, suspect loose or dirty battery cable connections. If you get a rapid repeated clicking, a loud buzzing sound actually, suspect a run down or defective battery. The place to start is by measuring the battery voltage with a digital voltmeter. It should read 12.6 volts if it's fully charged. If it reads closer to 12.0 volts, it's okay but discharged. If it's less than 11 volts, suspect a shorted cell and it must be replaced.
Saturday, September 10th, 2011 AT 11:57 PM