Under the passenger side headlight assembly, you have to remove the entire assembly to get to it.
The 1999 Dodge Neon horn is located in the front of the engine compartment. The horn will be on the right hand side of the radiator.
check horn relay.
A 2004 Dodge Neon uses 5W30. It can be synthetic,, conventional, or a blend.
YesYes
the horn relay for the 2002 Neon is located under the hood. It is inside of the relay box, the lid should tell you which relay is for the horn.
Under the hood in the fuse block
If it's just the horn itself...$20 buck for the new horn. install it yourself with the Haynes repair manual, Dodge Neon 2000 thru 2003. Book #30036. The horn is under the passenger headlamp.
A 2004 Dodge Neon uses red, five year, HOAT antifreeze. Zerex sells it as G05.
The switch and fuse housing in front of the battery
The IAT sensor on a 2004 Dodge Neon is on the intake manifold. It is inside the number two intake runner.
1342
5w30