Took the van back to the dealer yesterday. The service writer called today to say that the problem that we have (windshield wipers going/washer fluid spraying, lights blinking, steady horn sound) replicated itself today when someone tried to use the remote to unlock it. They took it into the garage and did some inspecting. They found that the plastic container that holds the windshield washer fluid has a tiny hole in it, and the fluid was leaking onto a harness, which had corrosion on it. The harness is somehow connected to the TIP module. They are 99% sure that the fluid leaking onto that harness was causing the problem, and making the TIP module faulty. They will not replace the TIPM until they are 100% sure, but they are leaning towards replacing it and giving the van back to us. Hope that this helps someone in the future if they have the same problems...

 

Thank you. I have added this information to the Tizzy DIY at the top of the page for later, incase someone else has this problem too.