Ok, so I'm posting for a friend that has a '99 F250. She has a weird problem that I'm not understanding and that the local NAPA can't figure out for her either. When it rains and she turns on the windshield wipers, the truck tries stalling and she said it has died a time or two. If she stops at a stop sign and turns the truck off for a minute then restarts, says it runs fine until she has to use the wipers again. Currently in western Wa and it's still winter so she's hating the problem combined with our frequent drizzles. Any ideas?