2000 Honda Odyssey.\R\nThe passenger side headlamp burned out and I replaced it, no issues two days ago. Battery was cranking slowly and terminals were corroded so I cleaned them. Last night in 15 degree weather, engine off and vehicle parked, horn stated blowing without a known cause. I could not start the vehicle so jumped it while horn was still blowing. It continued for twenty minutes, then stopped but vehicle would not shift out of park. Horn does not work now. I do not know where the fuse is. Owners manual does not list it. I used the key and pressed the shift lock release which allowed the vehicle to be driven. When I went to shut off vehicle. IP lights, running lights stayed on even after ignition off and light swith turned off. I disconnected battery and now can start vehicle without problems except I still need to use key and press shift lock release. I suspect I need to replace brake light switch on brake pedal to fix the shift out of park problem. Does anyone know if IP lights and running lights stayed on, horn staying on, replacing headlight, cleaning battery terminals, disconnecting battery are related. When it rains, it pours. Help.
Check fuse # 47 in underhood fusebox. It is for the brakes and horn. When it is blown, the gear would not be able to be shifted out of park without using the emergency overiding slot as the interlock solenoid would not be working.
The lights staying on should be due to a sticking taillight relay in underdash fusebox.
Not all problems are directly related but the weather could be the cause for sticking relays causing the horn and taillights to stay on.
Horn relay is inubderhood fusebox.