One
up now. How to Test the Battery & Voltage Regulator on a Harley Davidson by Kat Oakley . Again, the voltage regulator … Which one does not matter for this
periods of time then it may 'boil' dry unless the battery fluid
Switch on the power supply and increase the voltage to say 10
See the complications
You DO polerize Generators. Connect the power supply positive to the battery
regulators (Motor Guzzies, pre 1975? Well when the actual battery is hot it cannot be charged to as
For a better experience, please enable JavaScript in your browser before proceeding. ]{The load is required to eliminate leakage currents
voltage so the output just comes back. You could try to get someone else to help. The last connection goes to one of the brushes. Step 1. Temperature test. DC generators were used prior to 1963 production (at least on Chevys). The amount of voltage that a generator produces, varies from type to type, making it essential to ensure the regulator falls into the range that can control the amount of voltage being generated. Test procedure: The output from the regulator is monitored while
A new 3-wire regulator is something like $150 if you were to replace the old one, but it may not even be a regulator problem. Hit the regulator with the plastic end of a
If the regulator isn't receiving sufficient voltage, of course it will not be able to output its rated regulated voltage. volts, the indicator on the load should show an output ie LED lit
If you do have output then increase the supply voltage until the
Take a test light and clip it to the negative terminal of the battery and then touch first one pin and then the other on the plug that goes to the regulator. This is to make sure that voltage is, in fact, being supplied to the regulator. Purchase a multimeter. Set the supply voltage so the output indicator is
This is a connection problem that needs to be fixed because the BROWN wire should only have voltage on it with the key on. regulator is faulty. A good alternator should maintain battery voltage between 13.9 and 14.8 volts (14.2 is optimum). These are for vehicles that have a very
Bench testing a regulator is not straightforward. For an airhead or older bosh type external regulators see the diagram above. If your meter allows you to set a voltage range, then set it between 0 and 10 volts. If it is higher than it read before putting it in, replace the regulator. zero. All the regulator does is connect the brushes to the supply until
About
Check for voltage drop between cover of voltage regulator and body on low voltage scale of voltmeter. If it's a digital meter, input the setting to measure volts. bike/car/truck. If the VR seems to be charging the battery correctly then a full-field test of the alternator should be performed. I did this by the following test. If indicator shows charge-trouble is in the regulator. vehicle. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. indicator. To check the regulator unplug it from the stator. flickering permitted. Others follow the detailed instructions below. The voltage regulator maintains the voltage from the battery while the vehicle is running. Increase the engine speed. vehicles). Hello, How do I bench test a Delco Remy 6 volt voltage regulator using just a volt/ohmmeter? The load with indicator is connected across the brushes. If your voltage regulator is mechanical you should feel it clicking. Yes and No. The issue may not be the regulator and might be the generator. If the stator checks out, and you're not getting sufficient voltabe back to the battery, the regulator is shot. This meter will be able to read the voltage running through your battery and will indicate whether your regulator is working properly. If you get even the slightest amount of light from the test light the regulator is toast. one)
connections! Well it will go to one of the
I am familiar with off car testing Bosch regulators, but am a bit stuck with this one! --- try this first, take 12 volt test light and place it in where you removed the 30 amp fuse -- if the test light lights up, the red wire going to the reg. Paul, None of the gauges were working. A LED with a series 850 ohm resistor as a load with
Just as electrical systems powered by an alternator, 6-volt systems require a voltage regulator to prevent the battery and generator from burning up light bulbs, blowing fuses and melting the electrical system. Test 3. On my 48 the ammeter shows no charge at idle or at higher speeds. Connecting a test load. [4] X Research source A multimeter is often much less expensive than other complex diagnostic tools and can cost from anywhere from $14 to over $… certain. Simple? other regulator's connectors. Does anyone know if you can bench test a constant voltage regulator (instrument voltage regulator) to figure out what is going on? regulator. If you don't uderstand the above items and descriptions, give
some voltage (between 13 and 14 volts) is reached. Before starting
Step 1: Identify the regulator connections. I recently purchased a new regulator/rectifier for my 23 hp Kohler engine (12/15A part# 25 403 35-S) Before installing the regulator/rectifier and replacing the Blower Housing, I decided to first test the voltage regulator to make certain that it was going to output the required 12+ volts. Common alternators have internal voltage regulators. Check the that output remains constant, no
is replenished. Testing A Voltage Regulator. hi does someone here know how to bench tets a voltage regulator?? This should occur when the
connection to the regulator), turn on the supply and confirm the
vehicle dash board and the smaller diodes in the rectifier. As used on BMW Airheads, Motor Guzzies and older cars. other brush goes to the other side of the load with indicator. YOU must correctly identify all the connections on the regulator. If it is lower than before putting it in, repair or replace the alternator. I'm on my way out the door and don't have time to dig up the exact specs, but stator output should be something like 16 to 20 volts AC per 1000 rpm. And how correct is your voltmeter? VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Voltage Regulator Voltage Range-20 F 14.3—15.3 80 F 13.8—14.4 140 F 13.3—14.0 Above 140 F Less than 13.8 (6) If the voltage is below limits, proceed as follows: (a) Check for a good voltage regulator ground. I think Mitsubishi build the alternators and I attach a photo, hopefully below, cribbed from a well known auction site advert! output stops (drops to zero, or near zero). Test leads - 4 off minimum. Turn the dial on your multimeter to measure voltage. Modern regulators have three connections. terminal of regulator and connect to ground. You need knowledge of electronics or electricity. Where does the other brush go? indication of 'output'. between 13 and 14 volts) where the output voltage drops to near
Does it really matter what voltage the battery is charged to? Water temp and fuel guages aren't working. the input voltage is varied from 10 volts upwards. Luckily, testing the voltage regulator is a fairly simple task. Step 0: Equipment required. Some Harley owners like to fix their own bikes, thereby saving both money and riding time. This kit lets you safely test charging systems under normal operating conditions because it bypasses only the external wiring, not the voltage regulator. If no indication switch off the supply and recheck. Regulator/Rectifier Test #2: Reverse Bias of Positive Circuit Diodes. test, the results are the same! Please read the entire procedure before starting. Older Bosh Regulator viewed from the connector. Step 3: Testing. Next, put the multimeter's negative lead on all three terminals of the gray three-terminal connector individually. Connecting the power supply
01 Test voltage across the battery terminals with the engine running. That is ALL! Be careful not to dislodge any of the electrical
you DO NOT polerize alternators. diagram is for BMW R airheads and other older bosh type external
JavaScript is disabled. indicator load by disconnecting the regulator totally, then
A lower or higher
higher voltage as when the battery is cold. DISCONNECT ONE BATTERY CABLE BEFORE REMOVING WIRES FROM THE REGULATOR..... To check a Delco-Remy regulator...Remove wire F or Fld. Slightly reduce the
from the regulator giving faulse readings.} With the regulator unplug have you put the fuse in to see if doesn't blow. section if you want to hit the thing. body of the alternator or vehicle. It will be the same wire colour throughout the
A dc volt meter (if the above power supply does not have
The following
When testing the voltage of a voltage regulator, we first check the voltage from the input pin to ground. Check the stator output, and check the stator for shorted or grounded. Your battery should be charged, … You'll find that the mechanical voltage regulators have trouble keeping the voltage right at 14V when the system is under load. Why is the voltage not more precise? Alternator = AC generator. Warm the regulator up (use a hot air gun (hair
The British police airheads were fitted with these when the bikes
1. [You could also use a resistor between 180 and 1k
Another connection goes to both the battery warning lamp on the
one to identify. Set your multimeter to DC Voltage and select the 20 Volts in the scale. indicator. If you have dim headlights or other abnormal electrical issues with your vehicle, you should test the voltage regulator. warning lamp connection of the regulator. After testing the batteries for shorts, perform the "Diode Trio Test" procedure in this bulletin, followed by "Voltage Regulator Adjustment" procedure, if necessary. Step 1. marginal electrical system for the duty to which they are put. Test the regulator. If the battery is only brought to a low voltage
(b) Turn off ignition switch and disconnect voltage regulator connector. brush is connected to one side of the load with indicator, the
(or voltmeter indicating). 0.2 Amps max required. Test Result: The output should be close to the input voltage
I have some old regulators in a box that I took off of various old cars in the past. OK, the regulator might test OK, but you should make
When I ground the field winding and rev up the engine the generator output increases to 6+ volts. That is all this procedure checks. For UNDERCHARGE Condition To avoid unnecessary work, always check for loose belts, a defective battery, and damaged or corroded wires and connections first. diagram above. supply voltage is between 13 and 14 volts. Then retest. Set the parking brake and shift the transmission to Neutral (manual) or Park (automatic). In fact, the JIMCO setup for testing common Chrysler systems substitutes its own solid-state voltage regular in place of the ECM. une harley image by Géraldine Royer from Fotolia.com. Some regulators are called 'high output' and are set to a higher
Check the
It may be connected by a bolt/screw hole to the
ohm as the load and a dc voltmeter across the resistor as the
If you don't then you can damage the regulator. Simple eh? voltage means the regulator is faulty. Can anyone tell me how to bench test a voltage regulator from a 67? If the battery is left at a high voltage for long
Testing the generator and regulator on a 6-volt electrical system is … For an airhead or older bosh type external regulators see the
This will give you a very accurate reading. for a short period then it will not reach full charge. Connect the power supply negative to the earth connection of the
If the voltmeter reads above 16 volts during this test, then the regulator is not properly grounded. Step 2: Connections. I suspect the voltage regulator … i have a 2008 v rod night rod special i know its a 3 phase regulator and iknow how to test them with a moltimeter on diode mode and its not giving me a reading on the negative side. were used in the cities. voltage than is usual. So the regulator may
sense the temperature and adjust its output voltage to suit. Set your multimeter to 20 volts DC (Direct Current) and connect the positive (+) and negative (-) leads to the corresponding battery terminals. rotor or worn-out brushes. on (say 13 volts). Test circuit shown on the left of the regulator. I've traced wires from the grounds through the sensors to the guage cluster connector, all are good. A multimeter can be purchased at a hardware store, online, or at an automotive store. Thanks. Put the multimeter's positive lead on the positive terminal of the black two-terminal connector. drier)) but not too hot (you must be able to hold the regulator). remove the regulator from the vehicle. When I bought it did come with a new "circuit board" to go on the back of the cluster. If no indication and the load indicator is working, your
Make certain you have these connections right! Voltage on the ORANGE wire might be a diode problem. bench testing instrument voltage regulator Bronco Tech. You now have checked the complete field circuit and the voltage regulator has the same effect as shorting the field at the generator directly to ground. Most regulators have the voltage and amperage listed on the regulator for identification. Modern regulators have three connections. Battery charging issue seems to be a common problem with our vintage British cars. Voltage on the BROWN wire on the first test means the regulator has power to it all the time, and that causes a battery drain. So the ideal voltage depends on temperature and the use of the
DISCONNECT ONE BATTERY CABLE BEFORE REMOVING WIRES FROM THE REGULATOR...................... 67's use alternators not generators. until the input voltage reaches some set voltage (should be
Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Congratulations. One connection is ground/earth/chassis this should be the easiest
connect the load indicator directly across the supply (no
is grounded. To test if the regulator needs to be replaced, you put a small screwdriver into the D shaped hole on the back and read the voltage. First thing I would try is opening up the regulator and cleaning the relay contact surfaces. A dc variable voltage power supply, 10 to 15 volts. Vibration test. Connect the meter's red lead to the battery's positive (+) post and the meter's black lead to the battery's negative (-) post. I think I have a bad 6 volt regulator on my 48 Ford flathead engine because the voltage at the battery jumps all over the scale and the points in the regulator look burned. The alternator and voltage regulator make up the charging system of your vehicle. screw driver. I have a variable voltage, variable current bench supply and a 5W 12V bulb as a load.
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