1987 245. The wipers run intermittently with the wiper switch(es) off. Some times they run continiously, sometimes like they were on intermittent. The rear runs more often than the front. It seems like hitting a bump tends to trigger the unintended wiping. The operation of either wiper seems to be independent of the other. They may run for several minutes before stopping or they might just make a single sweep (one or two sweeps is slightly more likely for the front wipers).

If the headlights are off, the wipers will not run (on their own). Turning the headlights off will not stop the wipers if they are running.

Possible red herring: the past few days the system voltage was low when I started the car (gauge said so, headlights were dim, and the wipers were slow). By the time I backed up and started moving forward the system voltage came up to normal levels. The wipers only started acting up today.

I'm going to have a look at the wiring diagrams. If someone knows what's wrong or has a direction to look, please let me know.

Thanks

Greg