Two problems related to horn assembly have been reported for the 2003 Mitsubishi Lancer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Mitsubishi Lancer based on all problems reported for the 2003 Lancer.
Multiple dashboard lights activated simpltaneously (abs, srs, battery, emergency brake) at the same time the horn and wipers malfunctioned it was quite disorienting and happened in heavy traffic in a rainstorm! quite unsafe.
I had just arrived from work and pulled-in my driveway, I was idling my car before shutting off the engine. I then switched off my headlights, but the headlights stayed on. I then proceeded to turn the headlight switch on, then off; after several attempts the headlights finally switched off, but then, the headlights, parklights, markers and even the license plate lights would flicker until the ignition was switched off and pulled out the key, but just before this incident I used my wipers to clear my windshield of rain/mist with a one wipe/manual sweep and the wipers just seemed that it didn't want to stop wiping until the ignition was switched off and the key pulled out. This is the first incident and it was raining or had just rained. The dealership then replaced both light and wiper switches after determining that there was a short. This seemed to address and correct the problems. Then on April 28, 2008 I had just arrived at work and was idling my car before switching the ignition off, as I switched off the lights the horn started going off continuously. If the lights were left in the on or park position, the horn would stop, but when the light switch was turned off, it didn't stop going off even when the ignition was off and the key pulled out. It only stopped after the fuse was pulled out. Again, the weather was raining or had just rained. I then dropped off my car at the dealership and they determined that water intrusion through the driver's front kick panel to junction block, instrument harness, floor harness and chassis harness. Corrosion on pins and connectors causing failures and shorts to all systems. They had an outside vendor seal around wiring harness behind inner fender well. At this point none of the wirings nor harness were replaced. I was informed that this would all be customer pay and not covered under warranty as I have exceeded the 3/36 warranty period. Wipers horn and remote un/lock don't work.