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I replaced my alternator and battery. Now the heat stays on all the time. I have read in other places that after replacing the alternator, other people havethe same problem with the heat staying on.
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would need a little more clarity on what you mean by stay charged. However if you mean that the battery runs down and dies after a period of time with the radio and heat on, then I would go to a car parts place like auto zone, oreilys, or advanced auto parts. They will be able to test your battery and your alternator. It could be that your battery is weak and needs to be replaced, or that your alternator is not charging your battery fast enough. Hope this helped.
there is a power leakage in the electrical system
disconnect the earth cable from the battery and place an amp meter in the circuit ( terminal to lead end) and check for current reading. the amount of current flowing will give an indication of the drain and what is likely to be still on. ( glove box light,boot light,interior light,relays,fuel pump, faulty ECM radio amp or booster diode in alternator etc)
There are two things that generally cause a battery warning after an alternator replacement. The most common is 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. You can check that the alternator is supplying enough power by starting the car and disconnecting the battery. If the car dies, the alternator isn't working properly (or a wiring/relay/fuse issue).
Loose drive belt---loose wires or connections on alternator--- Dirty battery terminals--clean to shiny metal both battery and leads.---- faulty rectifier in alternator.. Pace a multimeter across the battery terminals and set to dc volts reading Place revs at around 1500 rpm and read voltage . if no reading set to ac voltage and repeat. If you get an ac volts reading replace the alternator.
You should use a motorcraft alternator , Not aftermarket ! Do you know how to do automotive electrical circuit testing ? Voltage drop testing , How to read an use a wiring diagram to pin point places in a electrical circuit to do tests ? Do a charging system voltage drop testing , test engine ground etc... The Trainer 47 What measuring voltage on the ground side means
REPLACE BATTERY CABLES THE POSITIVE BATTERY CABLE COULD BE SHORTING TO GROUND.REPLACE STARTER SOLENOID IF NOT BEEN REPLACED.BESURE TO PLACE BACK FLEXIBLE CONDUIT THAT GOES AROUND POSITIVE BATTERY KEEP FROM SHORTING TO GROUND. LAST TIME I SEEN BATTERY CABLES OVER HEAT WAS EITHER STARTER AND SOLENOID SHORTING OUT OR VERY LOOSE BATTERY CABLES CONNECTIONS. REPLACE BATTERY CABLES IF THEY ARE MELTED HAVE STARTER CHECKED OUT YOU COULD HAVE FAULTY STARTER STILL.
Did you get the wires all back in place? What voltage do you have at the output of the alternator? Measure the voltage with the engine running and not running.
No such thing. If you have a new battery, and the alternator's testing fine then there's obviously something draining the battery. You'll need a multimeter for this. First off, once started, test the battery voltage at idle. Then increase RPM to about 2000. The idle reading could be as low as 10 Volt(since you just put a massive drain on the battery but should pick up with RPM to aboout 13 Volt at least. It could even go up to 14 Volt. If that is fine, shut down. Disconnect the neg pole on the battery. Switch your multimetre to Amps(You may have to move one of the meter wires to a current measuring connection on the meter.) Connect the leads between the neg of the battery and the cable that came off it. A reading any larger than 0.5 amps (500mA) could mean trouble. First thing I always check for is trunk and glove compartment lights. They may not be turning off with the lid closed. Next is aftermarket amplifiers. If incorrectly installed it does not shut down and drains the battery in no time at all.
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