I'm trying to get as many volts to the rear of my vehicle, to a seperate battery bank as well, to read around 14.4 volts. 15 volts will be great as well. I don't want to fry any electronics, so what do I need to do? My car is PCM regulate at what seems to be 13.5-7 volts. I would like to take advantage of my High Output alternator. What can I do to raise the voltage my alternator puts out?
David,
The high output alternator you have puts out higher amps - not volts. 13.5 volts out is more than enough to keep your car battery charged. Excessive voltage will damage a battery.
If your car requires more amps than the original alternator was able to provide to (1) run the car and (2) all the electric accessories; then a higher output alternator is needed (the battery is only needed to start the engine, that's it - they are designed to provide a large amount of current (amps) for a short period of time as when starting). Otherwise, the battery would have to make up the difference between the what the alternator can provide and the actual amount of amps needed / used. Used this way, the battery lights would dim, engine slows and everything would just stop and go dark.
If you're running a powerful audio amplifier, the current it might need may be so much current that it may be too much for the alternator alone to provide - hence the high output style was installed. You can use one or more large value capacitors - or additional batteries to "fill" in whenever the amplifier briefly needs more current than the alternator can provide - without drawing on the main car battery.
Your alternator is probably just fine.
SOURCE: Alternator or Voltage regulator
if you can carefully put a metal wrench on the rotating pulley of the alternator and felt a magnetism attracting the metal wrench, then your alternator is charging. if there is no magnetism, then the alternator is not charging...
another test is to measure the voltage on the small wires that went in to the alternator that says "F" for field, it should measure battery voltage...that is the voltage from the regulator..that means your regulator is working...but the altrntor is not..
without that battery voltage, then the regulator is he culprit...
pls be carefull...
hope i was able to solve ur problem..
pls rate me.. tnx, drcool..
SOURCE: 97 Subaru Legacy GT Alternator Voltage Output
Battery is probably on it last legs... alternator sounds normal.
SOURCE: Battery light still on after changing alternator and battery.
i have a 2003 chevy silverado the riverse has not worked for 10.000 miles any sugesstionswhat this might be and or how much.
SOURCE: Overcharging Alternator
Very short lesson on the charging system. Remember this, The higher the voltage the less the amps.in turn low voltage, high amps. When the Alternator is charging at or above 15v, It is virtually pure voltage and as a charging device is cooking your battery, not charging it. The alternator, though defective, is safe and your battery is in harms way. When an alt. is charging at or below13 volts, The charging amperage is approaching max output of the alternater, which, if maintained at that rate will overheat and cause alt, failure, The proper charging range is 13.6 to 14.2. Each end is the limit just short of maximum and eminent failure. Example: charging at 12v means the alternarer is at max output and is in danger of sling solder, litteraly. When you smell dulphur coming from the battery, The alt. is running wide open on the voltage and your batt ison death row. So, back to your problem. One more thing. All accessories that are designed to operate on 12v are art risk of being damaged from excess voltage. Some have a voltage limiter to protect against surges but not all. Oh, That is one heck of a hot alt at 140 amps. Is that original equipment? Well, I know I may have rambled a bit but I hope it helped you understand how it works so you can come to the conclusion I have. The Alternator has a bad regulator and is in whole or part defective. Good Luck, Ned
SOURCE: 1998 isuzu trooper 3.5L
Hi! Yes this can be caused by a bad powertrain control module. YOu may need a replacement to resolve this.
?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.
?€¢
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
?€¢
The ignition is on, with the engine off.
BATTERY NOT CHARGING
The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
?€¢
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
?€¢
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.
Your best is to have a qualified repair shop check it out ! Could have DTC'S - diagnostic trouble codes stored !
DTC P0562
The powertrain control module (PCM) continuously monitors that the system voltage stays within the proper range. If the PCM detects an excessively high system voltage, DTC P0563 will set. A high voltage condition may cause a stalling condition or other drive ability concerns.
DTC P0621
The powertrain control module (PCM) uses the generator turn on signal circuit to control the generator. A high side driver within the PCM allows the PCM to turn the generator ON and OFF. When Generator operation is desired, the PCM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the Generator is enabled by the PCM, the voltage regulator controls generator output independently of the PCM. Under certain operating conditions, the PCM can turn Off the generator by turning Off the 5 volt signal on the generator turn on signal circuit. The PCM has fault detection circuitry which monitors the state of the generator turn on signal circuit. If the fault detection circuit senses a voltage other than what is expected, this DTC will set. The voltage regulator also contains fault detection circuitry. If the regulator detects a problem, the regulator will ground the generator turn on signal circuit, pulling the voltage low. This also causes the PCM to set the DTC.
DTC P0622
Checking for codes an voltage drop testing the connections an using a scan tool to check data parameters is the only way to solve your problem . Which means taking to a qualified repair shop !
478 views
Usually answered in minutes!
×