Gauges and check light problem and speakers

All my guages but my rpm was working but then slowly all of them stopped working one by one, then the check gauges light flickers when slowing down, going downhill, or when maintaining a speed but shuts off when accelerating i have checked the fuses and looked up wiring diagrams but can't find one thats accurate, then all of the speakers in my blazer on the driver side of it wont work and i have checked the speakers them selfs but they all work but i would really like some help to get these problems solved.

My car has 193000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. There appears to be more than one electrical issue with your vehicle.. A common issue for GM vehicles, is IPC (instrument panel cluster) related concerns. Diagnoses needs to be performed to rule out a poor electrical connection at the back of the IPC. The speakers on the left side not working, may be the balance on the radio was inadvertently changed. It could also be a poor connection or internal stereo/radio failure. I recommend having your vehicle’s inoperative electrical components, IPC and radio be diagnosed and repaired by a certified technician, such as one from YourMechanic.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

A loose gas cap is one of the most common reasons for the check engine light to go on. Check that your gas cap is screwed on securely and that it`s in good condition. If you have a tank of bad gas in the car, your check engine light may come on.
The most common reasons a Chevrolet S10 has a check engine light are an emissions system component, a sensor, or a catalytic converter.
Sometimes, the check engine light comes on to let you know that there`s a problem with the car`s internal diagnostic mechanism. That means the system could be “finding” a problem that doesn`t exist, or it could be that loose wire systems are creating a false positive in the system.
If the check engine light in your Chevy Blazer starts flashing, that means that the problem needs attention instantly and your Chevy should be brought in instantly. A flashing light reveals that the problem is extremely serious and if not taken care of instantly may result in major and meaningful damage to the car.
Check your gas cap first. Many vehicles have a loose gas cap indicator that will be triggered before your check engine light comes on. If your gas cap is loose or the seal is not tight, the vapor leakage can cause your fuel system to trigger the check engine light.
In a nutshell, the alternator helps to regulate the electricity necessary for the proper operation of your car. A faulty alternator not only turns the check engine light on, it also risks your safety.
The check engine light illuminates when your vehicle`s computer believes there is a problem that could affect — or is affecting — your car`s emissions control system. When the light comes on, one or more diagnostic trouble codes are stored in the car`s computer. These codes will stay there even if the light goes out.
Reset A Check Engine Light: Two Techniques

Start the car, let it run for one second, and then turn it off. Let the engine sit quietly for two to three seconds, and then repeat the whole process two more times.

Will your check engine light turn off by itself? In most cases, successfully repairing the issue that caused your light to come on will cause the check engine light to turn off automatically—but only after 10 to 20 “cycles”.
If the check engine light illuminates, it will either blink or remain constantly illuminated, depending on the problem. A blinking light, or in some cars a red light instead of a yellow or orange light, indicates a problem that needs immediate attention. Either way, you should have the vehicle checked by a mechanic.
Your Check Engine Light may indicate a simple problem that`s easy to fix—such as a loose gas cap that needs to be replaced. It could also be a warning of a serious problem that could damage your engine components. Your Check Engine Light blinks or glows depending on what`s wrong with your vehicle.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

While driving on freeway truck goes into a limp mode, and the check engine light, abs light, parking break light, service brake
ANSWER : It is possible that you could be having an issue with your powertrain control module. This is somewhat of a common problem on many GM vehicles. I would recommend having your vehicle inspected by the dealership to determine if the powertrain control module is functioning properly. If not, a reflash of the powertrain control module may resolve the issue but often times it must be replaced.

Gauges and check light problem and speakers
ANSWER : Hi there. There appears to be more than one electrical issue with your vehicle.. A common issue for GM vehicles, is IPC (instrument panel cluster) related concerns. Diagnoses needs to be performed to rule out a poor electrical connection at the back of the IPC. The speakers on the left side not working, may be the balance on the radio was inadvertently changed. It could also be a poor connection or internal stereo/radio failure. I recommend having your vehicle’s inoperative electrical components, IPC and radio be diagnosed and repaired by a certified technician, such as one from YourMechanic.

Electrical problems after upgrades
ANSWER : Hi there. From the description you have provided, all of your vehicle’s electrical problems began with the "upgrades". Unfortunately this could be a can of worms to repair. Assuming, you had a qualified technician install the vehicle’s radio and lighting upgrades and all was fine after the installations. This would lead me to believe your vehicle has several problems. The first place to look would be fuse(s) for the inoperative components. Next, to look for shorts to power the components staying on. If you can find the problem yourself, I recommend having your vehicle’s electrical problems diagnosed and repaired by a certified technician, like one from YourMechanic.

2007 Honda Pilot Check Engine Light and VSA light on and idling at higher RPM, problem with acceleration
ANSWER : Hi there. The Vehicle Stability Assist light typically will trigger when the system has been disabled and it not the source of misfiring or acceleration issues in most cases. Since your check engine light is illuminated as well, it is highly probably that the root source of this issue will be discovered by having a professional mobile mechanic complete a check engine light inspection. This will permit them to download all stored error codes and correctly diagnose the root issues your Honda Pilot is experiencing and recommend the right repairs.

2006 Ford Mustang has check engine light on
ANSWER : There are countless potential causes for your illuminated check engine light. The mechanic manually turned off the light, but it came back on because the problem has not been fixed. The first place to start is retrieval of the stored diagnostic trouble codes (DTCs). These codes serve as a starting point for any further diagnostics a mechanic may perform. Codes will be stored anytime the check engine light is on. Since the first mechanic was unable to fix your concern, I recommend giving the professionals at YourMechanic a call. We offer expert check engine light diagnosis and repair.

Car won’t start, check engine light is out but other lights are on, got new control and immobilizer but the problem remains.
ANSWER : Hi, thanks for writing in. It is possible that your check engine light bulb could be out. I would recommend having a qualified professional remove your instrument cluster to determine if the bulb for the check engine light has failed. If the bulb has failed, I would recommend having it replaced and see if your results change. If the bulb is not faulty, it is possible that something was installed incorrectly during the most recent repair. I would recommend retracing your steps to determine if any steps were skipped over or done improperly. This will help to determine the cause of why the check engine light will not work. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect your electrical system for you, and make or suggest any repairs as needed.

My car shows the Check Engine Light and DPF lights and coil light on the dashboard. What action should I take?
ANSWER : Hi. The EGR valve needs to be replaced and the passages to the EGR need to be cleaned. The EGR location is very tricky to get to so you may need a professional technician (such as one from YourMechanic) who can complete this repair. The diesel particulate filter (DPF) filter should also be replaced and the housing for the filter should be inspected for damage due to the people stealing your filter.

Abs light, emergency brake light, steering wheel assist light, engine light, EPC light, traction control light
ANSWER : Hello, thank you for writing in. The vehicle does utilize a lot of the same sensors for these systems. Are there any other codes that are coming up when this code appears? If so you will want to take these into consideration when processing the repair and making a diagnosis. The module may be bad, and replacing it should fix the problem. The lights should turn off once the main computer recognizes the new module and the sensors sync up. If you believe the sensors need to be cleaned you may do so. Do as minimal as possible to make sure you are not damaging the sensor or disrupting the wiring inside. A bad connection would make the lights stay on. With so many lights that are effected by the module being illuminated, the module is likely bad or does not have a connection. Check the connection first and then resort to replacing the unit. For more help with these electrical tests, contact our service department.