Why is my focus alternator not charging battery?
Why is my focus alternator not charging battery?
You yank the back cover and study the diode solder points close, you will almost always have at least one cracked and often more if still using that type diode plate and the alt is giving trouble. Some of the cracks can be very hard to see, the evidence though shows in the charging, they will appear to charge fine but it comes and goes.
What to do if your alternator is not charging?
Use a DMM (Digital Multi-Meter, about $12.00 at harbor freight)and make sure that there is continuity from the battery to the starter and then to the alternator. If there is not, replace the battery cable. This being said, I totally agree with Alex about the alternator pigtail connector. The ECU (PCM)regulates the voltage output to the battery.
Where does the power output from an alternator go?
First thing is first, the alternator power output wire goes from the back of the alternator down to the starter then, from the starter to the + positive side of the battery. Make sure that every connection point is tightened down. This is the cheapest option.
Can you change the battery light on a Ford Focus?
Had mine change and totally different car, runs quicker, no turbo lag, start quicker and much smoother, have you got obd2 and forscan will bring up code or try the in car code check ot sure how to doit but google will tell you i imagine i take that on board when checking glad you did not have a fire not nice
How to stop battery drain in Ford Focus?
Here is more information/steps to help out https://www.popularmechanics.com/cars/car-technology/amp5859/how-to-stop-car-battery-drains/ the problem you might have with leaving the door closed is the fuse box, unless your a contortionist getting in the window, down in to the footwell, upside down. might be a challenge!
What to do if your Ford Focus alternator fails?
Check the Blue (BU) wire and the Grey (GY) wire for continuity between the alternator and the Powertrain Control Module (PCM) pin 14 and 15 , as well as for either circuit, indicating a short to ground. If all checks show to be OK, replace the alternator with one from dealership before condemning the PCM for failure.
Why does the battery light come on on my Ford Focus?
If your Ford Focus’s battery light is on, it means a few things. It is trying to warn you that there is an issue with the charging system. The charging system itself is relatively simple. It’s almost always going to be caused by a bad battery or alternator. The battery light comes on when it detects that the voltage in the battery is too low.
Why did my Ford Focus ZX3 battery fail?
Ford focus 2006 zx3 alternator and battery failed. new alternator and battery wont charge system. Ford focus 2006 zx3 alternator and battery failed. new alternator and battery wont charge system. – Answered by a verified Ford Mechanic
How can I check the voltage of my alternator?
Check the circuits of the alternator. The heavy Red (RD) wire at the alternator should show full battery voltage (fed off of the battery (+) cable) as should the small RD wire (fed from Battery Junction Box (BJB) fuse 10) on the voltage regulatorconnection.
You yank the back cover and study the diode solder points close, you will almost always have at least one cracked and often more if still using that type diode plate and the alt is giving trouble. Some of the cracks can be very hard to see, the evidence though shows in the charging, they will appear to charge fine but it comes and goes.
How to replace alternators with a new battery?
P1246 I Replace Several Alternators, New Battery Checked Wiring P1246 I replace several alternators, new. have the same problem? Possible causes GEN-MON circuit short to GND. GEN-MON circuit short to B+. GEN-MON circuit open. GEN-COM circuit short to GND. GEN-COM circuit short to B+. GEN-COM circuit open. ILC circuit short to GND.
What causes a battery light to come on after an alternator is installed?
The most common is, again, a loose connection either with the control plug (aka “relay” plug-in), charging line connection, or the ground. The other is a blown fuse or defective connector or relay, which could have been broken or shorted when the alternator was installed or on the first start-up after its installation.
How can I tell if my alternator or battery is OK?
As with most electrical issues, if you know the battery or alternator is OK (because you had it tested), then diagnosis comes down to tracing and testing for continuity from one portion of the circuit (s) involved to the next.
Where is the voltage sensing wire on a focus?
The ECU (PCM)regulates the voltage output to the battery. The connector has 3 wires. The middle one is blue and is called the voltage sensing wire. It goes to pin # 72 on the ECU (on a Zetec equipped Focus for sure).
Use a DMM (Digital Multi-Meter, about $12.00 at harbor freight)and make sure that there is continuity from the battery to the starter and then to the alternator. If there is not, replace the battery cable. This being said, I totally agree with Alex about the alternator pigtail connector. The ECU (PCM)regulates the voltage output to the battery.
The ECU (PCM)regulates the voltage output to the battery. The connector has 3 wires. The middle one is blue and is called the voltage sensing wire. It goes to pin # 72 on the ECU (on a Zetec equipped Focus for sure).
First thing is first, the alternator power output wire goes from the back of the alternator down to the starter then, from the starter to the + positive side of the battery. Make sure that every connection point is tightened down. This is the cheapest option.
Why is my Ford F-150 not charging?
Please try again later. On many Fords the alternator has a ‘smart charge system’ that regulates the output of the alternator to ensure the battery is being charged efficiently, reducing emissions and improving performance. So let’s come along with Eric O. at the SMA shop as he diagnoses this F-150 that came in with a no charge condition.
How do you remove an alternator from a Ford Focus?
Loosen and remove the bolts for the wiring harness and move the harness aside. Loosen and remove the mounting bolts that secure the alternator to the vehicle. Move the alternator aside. You can now disconnect and remove the wiring harness from the alternator. Lift and remove the alternator. Reinstall in reverse,…
How can I tell if I have an alternator problem?
To differentiate an alternator problem from the battery, you will need to use a voltmeter to check for voltage. First, turn off the engine and check the battery voltage. A fully charged battery should have a reading of 12.65 volts. Next, turn on the engine and recheck the voltage. You should have a reading of 13.5 to 14.5 volts.
Why does the battery warning light come on after replacing the alternator?
A relatively common “side-effect” of replacing a battery and/or alternator in a car is to have the voltage (battery) warning light come on. This is especially true in late-model vehicles with their more sophisticated internal diagnostic systems.
Why does my 2004 focus not charge the battery?
My wife’s 2004 Focus has a problem with the charging system. The alternator checks out fine and the battery is good. The problem is the car runs off the battery when running and the alternator isn’t recharging the battery. Is there something in line between the alternator and battery that’s causing the problem?
