You will also want to check the electrical connectors on the passenger side of the transmission. The same driving-in-rain scenarios have happened to me and a few other members here and what we found was that those supposedly water-proof connectors were allowing water inside and some of the connections were shorting together. Another possible cause is a wiring harness that is routed too close to the exhaust sometimes gets it's insulation melted from the heat, which in turn allows the same possible problem, shorts and crossed circuits.

Different members have addressed the problem in different ways, but suffice to say that disconnecting the connectors, giving them a good cleaning with electrical contact cleaner, applying some water-proofing dielectric compound, reconnecting the connectors, then further sealing them from the elements with shrink tubing or electrical tape has kept the problem from happening again. Connectors with melted insulation would obviously require more repair.

http://www.vehicross.info/forums/sho...ion+connectors