2005 Ford Mustang electrical problems

Filed Feb 20, 2025 · Airbags, Body · 87,000 miles · TX

The contact owns a 2005 Ford Mustang. The contact stated that during inclement weather, water was entering the cabin of the vehicle through the passenger’s side glove box. The contact stated that due to the failure, mold had developed throughout the vehicle on the carpet, doors, and interior seats. The contact's husband also discovered that water had entered the computer module after inspecting the vehicle and the module was removed. The contact stated that the vehicle was inoperable after several repairs and several battery replacements. The vehicle was not repaired. The contact called the dealer and was referred to the manufacturer for assistance. The manufacturer was notified of the failure but offered no assistance. The failure mileage was 87,000.

Filed Nov 22, 2024 · Electrical, Lights · 170,000 miles · WA

The contact owns a 2005 Ford Mustang. The contact stated while driving 65 MPH on a rainy night, the headlights started flickering. The contact stated that upon exiting the freeway, while driving 30 MPH, the headlights completely turned off and the hazard lights were inoperable. The contact drove to the nearest gas station and turned off the vehicle. The contact stated that upon attempting to restart the vehicle, the vehicle failed to restart. The vehicle was towed to the residence. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 170,000.

Filed Nov 5, 2023 · Electrical, Lights · NE

Body control module. It gets wet when it rains because of an engineering mess up. It shorts out my lights. Sometimes it can't get out of car because it messes with the locks and windows. Can't use my electric mirrors anymore. Instead of being a much needed recall they decided to not even make replacement bcm. It is a problem everything it gets wet that should have been recalled and fixed. At least a thousand other incidents of this happening to others.

Filed Jul 12, 2023 · Electrical · CA

I've own a 2005 Mustang GT since the year 2012. Throughout the years I've encountered problems where the cooling fan would abruptly shut off and cause the engine to overheat. The first time this happened I had to pull over to the side of the road countless of times just to let my car get cool enough to get back home. I brought the Mustang GT in to a mechanic who suggested to replace the radiator fan. After replacing it, the fan would work for a few weeks only for it to randomly shut off, but turn back on. Just recently I found oil in my spark plugs and found the following OBD II error codes: P0480 Fan 1 Control Circuit & P0481 Fan 2 Control Circuit. I am convinced the valve seals and maybe the piston rings were worn out due to excessive heat caused by the Mustang's electrical issues with the radiator fan. After searching online, I found countless amounts of threads and videos of other Mustang owners experiencing the same issue. Most of them are caused by a faulty relay connection inside the Mustang's fuse box that is causing the radiator fan to fail. The faulty relay would get burnt and cause a short thus not providing power to the radiator fan which left many owners stranded on the road and caused over thousands of dollars in damages to their engine. The part that gets burnt is not easily available and would require owners to pay an additional thousands of dollars to reconnect the relays. Some owners had no choice but to create a makeshift wired connection from their radiator fan to the dashboard so that their vehicle's engine can remain under normal operating temperatures while driving. I've attached a video of someone explaining this issue at the 8:00 Minute mark. https://www.youtube.com/watch?v=WAs6uf3VV68

Filed Jun 28, 2023 · Electrical · 56,981 miles · WV

The contact owns a 2005 Ford Mustang. The contact stated that while driving at an undisclosed speed, the speedometer and several unknown gauges on the instrument cluster became inoperable. The vehicle was taken to the dealer, where it was diagnosed that the instrument cluster needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 56,981.

Filed Jan 25, 2023 · Electrical · 150,000 miles · SC

The contact owns a 2005 Ford Mustang. The contact stated that after parking and turning the vehicle off for extended periods of time, the vehicle would not restart, and the battery needed to be recharged. The vehicle was taken to the local service center who was unable to determine the cause of the failure. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The failure mileage was approximately 150,000.

Filed Oct 14, 2021 · Electrical · 40,000 miles · NE

The contact owns a 2005 Ford Mustang. The contact stated that one day after a rainstorm she noticed several unknown warning lights were illuminated. The contact stated that the headlights were inoperable due to the water leaking into the interior of the vehicle. Additionally, there was water leaking into the interior of the dashboard. There was also water coming out of the driver’s side front air vent and the interior lighting in the vehicle from the interior module and center console. The lights were flickering on and off. The contact took the vehicle to a local dealer however, the dealer was not able to determine the cause of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 40,000.

Filed Apr 27, 2021 · Electrical · 37,800 miles · SC

I'm having the same issue everyone else is with their speedometer, tach, fuel gage. It was working fine, the weather warmed up and it would work sometimes. Then it just stopped working completely. I'm afraid to drive the car because I have no way of telling how fast I'm going. I could understand this happening if I had 100,000 miles on it, but as of yesterday, 4/26/2021 it just hit 39,034. With everyone having this same issue, how is not a safety recall. I had to replace the instrument cluster at cost of $875. This is a known issue and a dangerous one.

Filed Jul 13, 2020 · Brakes, Electrical · CO

Just got it don't know what's wrong with it

Filed Dec 23, 2018 · Electrical, Lights · 157,000 miles · CT

There is an apparent design flaw in 2005 mustangs as I have read hundreds of similar complaints as to what I am experiencing. Due to this design flaw after a recent day of heavy rain 1 headlight and 1 signal light will not turn off once the car has been shut off. I researched and apparently the smart junction box (sjb) got wet and the electrical unit is now malfunctioning. There was also a strong burning smell when I got home that night as well. Spoke with an online mechanic technician and he confirmed that the sjb needs to be replaced. There has been a long history of the car leaking on the passenger side whenever it rains due to the design flaw. Also my gas gauge never reads properly, inside lights are also dim/off and the check engine light has been going on and off for nearly a year and my mechanic could not diagnose why the reviews online said when they spoke to ford that admitted that it was a known problem but because there has been no recall that they will not repair this for free. Estimates I read put the cost around $1000 to get this fixed and do not want to pay that kind of money especially when ford admits to knowing there is a problem. I am hopeful that we can get ford to do the right thing and issue a recall for this. It is a serious problem since the electrical system can cause a fire from reports I have read. This happened to meet on 12/21/18. I was driving home from work and parked the car and shut it off. As I locked the car I noticed that the drivers side headlight and passenger side signal light stayed on and I had to disconnect the battery to make them shut off. Also there was a strong burning odor when I lifted the hood.