Hi all, my key fob has suddenly stopped working, (changed battery, same results). Along about the same time, my wiper delay and wiper return to down position stopped working. As did my OD lockout switch........Where do I start?????????

 

Bad ground under the dash.
You really need a factory service manual to find them all.
http://www.genosgarage.com/products.asp?dept=241

 

You may be in the wrong truck!! Don't get caught in it!!

No, seriously the key fob will wear out eventually.

When my wipers started doing what you described it was wiper motor R&R time.

I don't have the O/D switch.

I would follow infidels advice and start with the grounds. Its free and a good starting point.

 

I thought about the key fob going bad, but I have a second one. Unlikely both went out at the same time.......