Lucky post I was gone all day and thought I'd just look around a bit before hitting the hay.
I didn't think wd40 was the solution, but it would do no harm to try.
Sounds like dealer gave you cost to do engine diagnostics, which is what you need to do if check engine light comes on, this is not your current problem.
I've had to replace relay for wipers, but loss of intermittent feature is not your sole problem, therefore the timer most likely suspect. I cannot advise on price of same, but timer will cost more than relay.
Edit: Look at responses re wipers to J.Salvi currently showing up on pge 6 of problems, note in particular defrost relay substitute as test for wiper relay malfunction. Since you won't be able to buy/order replacement timer 'til Mon. let me think about another check on timer functions... OK try this; is the seat belt warning working properly? By this I mean sound, dash light and time for light to go out with/without seatbelt on, engine running, car in drive, brake on.
