Keyless ignition not working.

ANSWER : The devices that failed may be on a common circuit and thus a relay, fuse, fusible link, or ground might be the issue. The keyless remote, although wireless, activates a vehicle circuit and that circuit, too, may have experienced some sort of failure, like the others. Your issue is primarily an electrical fault and thus the recommended service to get it repaired is an electrical component/circuit diagnostic. If you request that diagnostic, a certified mechanic will get this resolved. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

ANSWER : The problem you are describing likely stems from an intermittent electrical fault in the wiper circuit. The windshield wiper system uses a small electric motor to move the wiper arms that you see on the windshield. That electric motor is controlled through a switch, relay, fuse, and wiring. One, or more, of those electrical components has failed although it is also possible that the mechanical arms are binding (seized, if the lubricant has dried out) thus causing the electric circuit to the motor to overload. Regardless of the underlying fault, if you request a non functioning wiper diagnostic/repair, the responding certified mechanic will get this taken care of for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

ANSWER : As unfortunate as it is, your vehicle would be considered flood damaged. Diagnosing electrical problems in a flood damaged vehicle is nearly impossible. This would take many hours or even days to determine which wiring harnesses and circuits have been affected. Then nearly all of the wiring under the dash would likely require replacement as well as many sensors and switches. On a BMW vehicle, the amount of wires and switches are likely more than that of a lower end vehicle. Due to the inefficiency in cost, you would likely be able to purchase another BMW like yours for less than what it would cost to fix your car. Many insurance companies would consider this type of damage to total out the vehicle unfortuantely.

ANSWER : Hello, thank you for writing in. Without knowing all of the testing you have done, I always recommend making sure the basic components are working perfectly. This means making sure your battery is good, its connections (ground and both terminals) are clean, dry, and tight, and make sure your starter is working. Then turn to your fuse box and check the starter relay, and any fuses your vehicle may have pertaining to the ignition switch. From there if you need to, you will want to look into the wiring and connection to the starter switch. Using a voltmeter is easiest. Your goal is to trace the available power to each component and find out where the voltage drop is coming from. For more diagnostic help, contact our service department to schedule an appointment.

ANSWER : Hi There,
It sounds like you may have a faulty blower motor resistor. The highest speed setting may still work because in most cars in the highest fan speed settings the current bypasses the blower motor resistor. In some cars, if the resistor is failed, the fan may stop working completely. Another reason a blower motor resistor may fail is when the blower motor has a mechanical problem or when a foreign object jams the blower motor fan blade and prevents it from spinning freely. This leads to increased current through the resistor and causes it to overheat and fail. I would suggest having an expert from YourMechanic come to your location to diagnose your system to determine what may be causing the fan not to work properly.

ANSWER : Hello. We’ll be happy to help you. There are a few things that I recommend checking to discover why your lighting system is malfunctioning. The headlight dimmer switch should be checked. Along with the wiring harness above the right front tire behind the fender well cover. Also
the main fuse under the hood should be inspected because other people with your particular vehicle have had similar lighting issues if that fuse goes bad. It will be a great idea to check the rest of the fuses in that area too while checking the main fuse. Once the fuses are checked inside of the main fuse box then I would check the fuses inside of their interior fuse box. The interior fuse box should be located on the driver side of the dashboard near where your legs would be. If you need more assistance with repairing your vehicle please keep in mind that our organization provides Mobile Mechanics who can help you diagnose and repair your vehicle, all at competitive rates.

ANSWER : Push-button ignition system designs are highly technical and vary between manufacturers. Here, in a nutshell, is how they work.

When you push the “engine start” button, that button sends an electrical command (voltage signal) to several control modules (computers). One control module (we’ll call it the body control module) uses antennas located inside your vehicle and sends out a radio signal to the key in your pocket. This reaction wakes up the RFID chip inside the key, and asks it to identify itself. The RFID chip in the key responds to the ID request with a radio message of its own where it sends its ID code back to the body control module.

The other control module that received the “engine start” command is the engine computer. We’ll call it the powertrain control module (PCM). The PCM is ready to start the engine, but it needs information from the BCM first, since the BCM controls the keyless entry system of the vehicle.

If the BCM accepts the RFID code from the key, it communicates this to the PCM, and the engine start is enabled. If an unprogrammed key is used, the BCM rejects the key code. The reject notice is communicated from the BCM to the PCM and the engine start is disabled. All of this communication occurs in less than 1/2 second!

This same process occurs to automatically unlock the doors of your vehicle whenever you grab a door handle.

ANSWER : Hi there. Based on your inquiry, it’s highly probable that you have a damaged light switch or some electrical fault inside the turn signal relay. However, it’s also possible that the brake switch above the brake pedal could also be the source of your problem. Due to the fact that multiple electrical components might be causing this issue, it’s a smart idea to first have a professional mobile mechanic complete a brake lights are not working inspection, so they can determine what’s causing all of these issues and recommend the right repairs.