Oil light coming on in the Rain

[ronfil56]

Strange problem has developed in my 2000 Voyager. For the past few weeks, each time it rains, or if I run the van through a car wash, the Oil light & chime come on. I had the pressure switch changed, and the oil pressure tested. All is fine mechancally. Any suggestions?????

[Rottweiler28]

Does the van run any different at all in the rain, if so your wires, distributor or coil may be getting wet and shorting out or drawing power from your van and possibly causing false readings to your computer. Have a look under your hood at night when it is really dark and see if there are any blue arcs or sparks anywhere at all, especially around the plug wires and coil. Just a thought.