Question about 1981 Ford F 100

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Wiring Motorcraft alternator internal regulator What does terminal D+ require is it switched 12 volts or something else

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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MobyMech
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SOURCE: alternator not charging

Hi

If you have a volt meter, set it to volts and hold the negative probe to the alternator body and the positive to the battery positive. If you don't get battery voltage then the alternator isn't grounded and the probable cause is the main engine ground cable either breaking or coming loose.

Very best regards

Geordie

Posted on Jun 10, 2008

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SOURCE: home wind generator early model chev alternator need schematic

Ok I'm going to try this from memory...last time used it was a few years back when wiring up a big boat. Large (B+) wire goes from battery to large terminal on alternator back. Facing the rear of the alternator, top spade connector on alt goes to a switch (there was supposed to be a resistor in that wire, but I never used one) switch connects to (+) on battery. Terminal on right goes to the (B+) terminal on alternator. Alt case is ground.
I can't find my old chiltons electrical book but that is how I remember it.

Posted on Apr 07, 2009

  • 173 Answers

SOURCE: Chevy G20 1985 wiring (charging problem)

http://wareznuke.com/apps/3872/all-1979-2007-vehicle-wiring-diagrams-v42-rapidshare-warez


Posted on Jul 08, 2009

  • 1071 Answers

SOURCE: wiring an amp meter diagram

put the meter in series remove wire gointo back of alternator put one lead on wire and one on alternator that should give you your reading

Posted on Jul 23, 2009

wilsodfarm
  • 986 Answers

SOURCE: wiring ??? I'm installing dual 12 volt battery's

pos to pos and neg to neg for 12 volt but if your system is 24 volt thats a different story it will be pos to neg.and pos to neg

Posted on Nov 02, 2009

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Replaced alternator 3 times and battery 2 times and still getting various readings from alternator voltage on a 2006 mitsubishi galant 4 cycindler ?


depending on the variations
after starting or cranking for a while the voltage will read 14.5 to 14.8 volts as the battery charges up that reading will drop back to 13.2 volts
it will be lower at idle 12 >13 volts as the alternator speed has to be around 1,500 rpms to get the alternator to charge
using the lights and any extra power requirements the voltage will go up to max of 14.5 -14.8 volts to compensate for the extra current required
drive belt condition and tension will cause variations if it is not correct
bad connections ( dirty terminals , loose harness fittings , corrosion) will all affect the ability of the alternator /regulator to produce constant voltage
you will have to ask an auto electrician if the regulator is part of the ECM as most have the regulator in the alternator or a separate unit on the fire wall
If it not part of the ECM then the ECM will have no bearing on the readings

Dec 05, 2016 | 2006 Mitsubishi Galant

2 Answers

The battery on my rhino loses volts when driving .battery dies then i have to boost it..something is drawing on the battery when the key is off ?????????


If the battery is not being properly charged while unit is running, it will go dead. You may have a problem with the voltage regulator or magneto causing the no charge issue

Mar 10, 2016 | Cars & Trucks

1 Answer

What is causing the battery to drain?


Running the car will drain the battery it if it's not charging ! An if your charging light is on it isn't charging ! Did you check power an grounds on the alternator ? There is a single heavier wire on the back of the alternator, this should have battery voltage ! You may want to take this to a ASE certified repair shop !
Functionality
With the ignition switch in the RUN position, voltage is applied through the warning indicator I circuit 904 (LG/RD) to the voltage regulator. This turns the regulator on, allowing current to flow from battery sense A circuit 35 (OG/LB) to the generator field coil. When the engine is started, the generator begins to generate alternating current (AC) which is internally converted to direct current (DC). This current is then supplied to the vehicle's electrical system through the output (B+) terminal of the generator.
Once the generator begins generating current, a voltage signal is taken from the generator stator and fed back to the regulator S circuit 4 (WH/BK). This voltage feedback signal (typically half the battery voltage) is used to turn off the warning indicator.
With the system functioning normally, the generator output current is determined by the voltage of the A circuit 35 (OG/LB). The A circuit 35 (OG/LB) voltage is compared to a set voltage internal to the regulator, and the regulator controls the generator field current to maintain the correct generator output.
The set voltage will vary with temperature and is typically higher in cold temperatures and lower in warm temperatures. This allows for better battery recharge in the winter and reduces the chance of overcharging in the summer.
Battery Positive Output (B+) Circuit 38 (BK/OG)
The generator output is supplied through the battery positive output (B+) terminal on the back of the generator to the battery and electrical system.
I Circuit 904 (LG/RD)
The I (ignition) circuit 904 (LG/RD) is used to turn on the voltage regulator. This circuit is powered up with the ignition switch in the RUN position. This circuit is also used to turn the charging system warning indicator on if there is a fault in the charging system operation.
A Circuit 35 (OG/LB)
The A (battery sense) circuit 35 (OG/LB) is used to sense battery voltage. This voltage is used by the regulator to determine generator output. This circuit is used to supply current to the generator field (rotor). The amount of current supplied to the rotor will determine generator output.
S Circuit 4 (WH/BK)
The S (stator) circuit 4 (WH/BK) is used to feed back a voltage signal from the generator to the regulator. This voltage is used by the regulator to turn off the charging system warning indicator. The S circuit is fed back externally on external mounted regulator generators.
Visual Inspection Chart Mechanical Electrical
  • Battery case, posts, hold-down clamp, cables and connections
  • Generator drive (serpentine) belt for condition and tension to make sure there is no slip between the belt and the pulley. For additional information, refer to Section 303-05 .
  • Battery charge
  • Generator pulley
  • Battery junction box (BJB)Mega Fuse
  • Battery junction box fuse:
    • 11 (20A)
  • Central junction box (CJB) fuse:
    • 30 (30A)
  • Circuitry
  • Charging system warning indicator
  • Cables
  1. Check the operation of the charging system warning indicator lamp (instrument cluster). Normal operation is as follows:
    • With the ignition switch OFF, the charging system warning indicator should be OFF.
    • With the ignition switch in RUN and the engine off, the charging system warning indicator light should be on.
    • With the engine running, the charging system warning indicator light should be off.
  1. Verify the battery condition. Refer to Section 414-01 .
Normal Charging System Voltages and Charging System Warning Indicator Operation Ignition Switch Position A Circuit 35 (OG/LB) S Circuit 4 (WH/BK) I Circuit 904 (LG/RD) Generator B+ Circuit 38 (BK/OG) Battery Engine to Battery Ground Charging System Warning Indicator Operation OFF 12 volts 0 volts 0 volts 12 volts 12 volts 0 volts Off RUN-engine off 12 volts 0 volts 1-3 volts 12 volts 12 volts 0 volts Illuminated RUN-engine running 13-
15 volts 1/2 battery voltage 13-
15 volts 13-
15 volts 13-
15 volts 0 volts Off
  1. If the customer concern is verified after the initial inspection, refer to the Symptom Chart to determine which tests to carry out.
    • The charging system warning indicator is on with the engine running (the system voltage does not increase)
    • Circuitry.
    • Voltage regulator.
    • Generator.
    • GO to Pinpoint Test B .
    Your whole problem is the alternator is not charging , a couple tests with a volt meter would tell you !

Aug 16, 2015 | 2001 Ford Expedition

1 Answer

Alternator Wiring Diagram


Usually the alternators possess one thick white colored wire directly coming out of the battery positive terminal (+) which is around 8 mm (outer diameter) and connects the battery with alternator and white or black 3 wires connector which is inserted at the rear of the alternator. If you look carefully at the rear of the alternator you will find the embossed letters there. Some time the letter may vary depending upon model year of the vehicle. Normally the letters describe L= Alternator warning LAMP in the in the instrument panel of the speedometer. B= 12 Volts coming out of the ignition switch on the ON position. G= Ground or chassis ground.

Nov 25, 2013 | Toyota Land Cruiser Cars & Trucks

1 Answer

I have a old tow motor w/ a wisconsin air cooled engine . I'm looking to change the 6 volt system to 12 volt system. looking for a basic 12 volt wiring diagram for GM alt. and wisconsin parts?


to change the points to electronic you will need to get the manufacturer of the distributor and contact them for a compatible electronic kit to replace the points or replacement distributor
to fit an alternator , get one with an internal voltage regulator ( talk with an auto electrician for the best unit --it is not necessary to go big amperage units so one about 35-60 amps will suffice and cheaper as well)
wiring will be the same as will fuses (neither volt sensitive)
gauges will have to be changed to 12 volt units
bulbs changed from 6 volt to 12 bulbs and switches will be the same as they are no volt sensitive
basically the same circuit can be used and the only place to be careful is the alternator wire to the battery and the charge light or volt gauge ( auto electrician can advise here )
starter motor will have to be changed to 12 volts and you will again have to get the replacement unit from an auto electrician as the bendix pitch , movement and mounting neck will be critical
wisconsin did not make electrical components but used off the shelf companies such as delco remy, lucas , bosch, ac etc for the accessories to the engine
it is an interesting project so collect as much information from auto electricians and web sites to help you

Jun 06, 2017 | Cars & Trucks

2 Answers

There is a ground some were that is causeing the battery not to charge put new selinoid ,new battery,alternater,new key lock cylender check wirers fuses relay switches and battery still wont charge


It sounds like you have done a whole lot of replacing and not much "diagnosing". Did you chech for battery voltage at the alternator? There should be battey voltage at the large Black/Orange wire that is on the B+ terminal of the alternator. This wire should have voltage all the time. If there is no battery voltage, you most likely have a burned fusible link at the starter relay area.
There should also be voltage at the "S" terminal with the ignition on. If there is no voltage, then check for voltage at the "S" terminal of the voltage regulator. If there is no voltage at the "S" terminal on the voltage regulator then check the "I" terminal on the regulator for voltage.

NOTE: The voltage on the "S" terminal should be 1/2 that of the voltage on the "I" terminal.

If there is voltage on the "I" terminal, make sure your voltage regulator is grounded properly to the fender and retest to see if it is charging the battery. If it is still not charging, disconnect the regulator connector and connect a jumper between the "A" and "F" terminals of the connector. Start the engine. The alternator should now be charging the battery at high voltage (usually over 15 volts) If it does, replace your voltage regulator. If it does not, then you need to check your wiring between the voltage regulator and the alternator.

Please also review this article:

What Else Could Be Wrong?

Jun 15, 2011 | 1987 Ford F 150

1 Answer

Alternator replaced


REMOVAL & INSTALLATION

The different engine applications that the Ford Taurus and Mercury Sable are equipped with utilize different types of alternators. The following is a list of vehicle applications. For 1986-90 vehicles:

The 3.0L and the 3.8L engines utilize a side terminal alternator.

The 2.5L and the 3.8L (with Police Package only) engines utilize an alternator with an integral rear mount regulator and an internal fan.

The 3.0L SHO engines utilize an alternator with an internal fan and regulator.For 1991-93 vehicles:

The 2.5L, 3.0L and 3.8L engines utilize an alternator with a rear mount regulator and an internal fan.

The 3.0L and 3.2L SHO engines utilize an alternator with an internal regulator and fan.For 1994-95 vehicles:

The 3.0L, 3.8L and 3.0L SHO engines utilize an alternator with a rear mount regulator and an internal fan.

The 3.2L SHO vehicles utilize an alternator with a internal regulator and fan.


1. Disconnect the negative battery cable.
2. Loosen the alternator pivot bolt, then remove the adjusting bolt.
3. Remove the alternator drive belt from the drive pulley.
4. Tag and disengage the wiring terminals from the back of the alternator. The stator and the field wiring are the push-on type of retainer. After depressing the lock tab, the connector should be pulled straight off of the terminal to prevent damage.
5. Remove the alternator pivot bolt, then remove the alternator from the engine.
6. Position the alternator on the engine.
7. Install the alternator pivot bolt and the adjusting bolt, but do NOT tighten the bolts until the drive belt it tensioned.
8. Engage the wiring terminals to the alternator, as tagged during removal.
9. Install the drive belt over the alternator drive pulley, then adjust the belt tension using Belt Tension Gauge 021-00019, or equivalent.

When adjusting belt tension, apply pressure on the front housing only.

10. Tighten the adjusting bolt to 30-45 ft. lbs. (41-61 Nm), then tighten the pivot bolt to 50-70 ft. lbs. (68-94 Nm).
11. Connect the negative battery cable.


Hope helps.

Jan 07, 2011 | 1990 Ford Taurus

3 Answers

How to check truck altornator


start engine unhook positive cable if it dies its bad alternator or fuesable link between batt and alternator also a volt meter will tell u if its charging a good alternator will charge 13.50 to 14 volts

Mar 18, 2010 | 1988 Chevrolet C1500

2 Answers

Dead battery. Alternator is charging, but the juice is not getting to battery. 1998 Slk 230. There is a relay p/n 002 542 20 19 05 3905 00, by the battery, (G) from the alternator has 19.8 volts, battery...


19.8 volts is too high. the alt regulator is not working. The regulator needs a battery source feed to work. Both the feed for the regulator and the connection between the output post and the positive battery terminal should go through an ALT fuse. Start by checking that.

Feb 28, 2009 | 1999 Mercedes-Benz M-Class

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