Alternater not charging Help

[crazyhorse]

I put a new alternater and a new voltage regulator on my 72 ranger xlt
and it does not charge the battery.
I took the alternater,voltage regulater solenoid wiring harness off
& checked it to make sure it was good.
What do I need to check next ?.
It is a automatic, 429 2 wheel drive.

[STROKER69]

Just a thought, but are you sure the battery will accept a charge, if the battery is almost dead an altenator will not charge it .

[fordman]

if it isnt that the battery is too low it could be the wiring wasnt hooked back up properly. or the regulator was bad out of the box. or the alterntor isnt getting excited from the regulator. so it wont charge.

[Thunderfoot]

Check that you have power on the Green/red stripped wire at the Voltage Regulator with the key in the ON position, this is the signal to tell the alternator to turn on and start charging. If you don't have power on this wire then you need to follow it back to the ignition switch (it changes color on the way to violet) to find out where the problem is.

[fordman]

tags: exciter wire (Green with a red stripe from regulator to ignition switch).

[crazyhorse]

Finally I get to work a little on "old red" my 72 pickup.
Well I need more help.(lots more help)
Let me update . I took my new alternator & voltage regulator back to Auto Zone, they checked them said both were bad.
Gave me another new alternater (which he checked in the store) .
Also gave me a new voltage regulator (but DID NOT check it).
I put them on but it still does not charge.
I checked and DO HAVE FIRE on the battery wire at the alternator.
I checked the green with red stripe wire at the voltage regulator and DO NOT HAVE FIRE.
I cheked my fuse box, all good fuses.
I have started following the lavender (light purple) wire from my ignition switch (hope I am on the right wire)
it seems to be going out the firewall on the drivers side. Is this correct? I had to come in for supper, so will try again
one day when I get a little time.
Meanwhile I sure would appreciate all the help/advice I can get.
They DID NOT check the new voltage regulator. I may take it back for checking.
Also while working on it tonight I thought I need
to mention that approximately 6 months ago have installed MSD 6Al ingition box, MSD blaster coil,MSD distributer
and a Black Magic electric fan, but everything worked, so don't see any problems there.
I (think) I have the alternator hooked up right but would like to see a wiring diagram.
I would like to see a wiring diagram of the lavender wire from the ignition switch to eventually the green with red stripe wire to the
voltage regulator.(which is the middle wire on the voltage regulator).
I HAVE FIRE on the 2 yellow wires joined together that go in the voltage regulator.
I did not mean to make this so long, but am trying to give all needed information.
I hope this is o k .
Thanks in advance for any help/advice .
If any more information is needed please ask.

[fordman]

http://www.fordification.com/tech/wirin ... _quick.jpg the green / red joins the violet at the red firewall plug. and the violet goes otthe ignition switch. there is also a wire that branches off and goes to the instrument cluster charge indicator. here is a different version of the same diagram. 904 is the green/red wire 98 is the violet wire. http://www.fordification.com/tech/wirin ... rging2.jpg

[crazyhorse]

Thank you Mr Fordman, MR Thunderfoot, Mr Stroker and all the others for your time and help in this.
I wish I could post pictures but I can't .
I am not good at electrical so there in lies the problem.
I took the tape off my alternator, voltage regulator,solenoid wires.
Removed the instrument panel,heater hose, glove box, ignition switch and untaped the underdash wiring harness.
On the voltage regulator with the ignition switch on I have no fire at the green wire with red stripe which is the middle wire.
On the voltage regulator with the ignition switch on I have .01 at the red wire.
On the voltage regulator with the ignition switch on I have 12.60 at the 2 YELLOW wires that go together before plugging in.
I cannot find out why it does not charge but I am not giving up. (yet).
Thanks for all the help. It is not ya'lls fault . It is my falult, I just cannot follow the help/advice / diagrams enough to find my problem.

[fordman]

check to see if you have power coming out of the ignition switch on wire 98 the violet wire. it could be the connection is loose in the ignition switch plug. or the connection at the violet and green/red wire is loose or disconnected. alot of times the violet wire and or plug is melted at the ignition switch.

[crazyhorse]

My ignition wires are NOT exactly like the diagram.
This is from the back of my ignition switch.
1 A Violet wire from ignition switch goes to low brake warn switch.
2 A pink wire (which is a larger wire) goes from ignition switch into a factory molded "knot" and a red/green stripe wire goes to + on coil and a brown wire also exits the molded "knot" and goes to ?.
3 A Black/green stripe wire (which is a larger wire) goes from ignition switch to a molded factory "knot" & 3 wires exit the "knot" , 1 is a violet wire that goes to the printed instrument cluster, 1 is a black/green stripe wire also goes to the printed instrument cluster, 1 is another black/green stripe wire that goes to ?.
4 A yellow (which is a larger wire) goes from ignition switch to ?.
The other slot on the ignition switch is empty.

The green/red stripe wire (coming in from fire wall on passenger side towards the drivers side), runs into a factory molded "knot" and a solid blue wire too that is cut off very near the molded "knot", there is red/yellow stripe wire exiting
the molded "knot" going to ? A red/gold stripe wire also exits the molded "knot" that has been cut off.

I am trying my best to describe the wires going from my ignition switch, they are just not like the wires on the ignition switch
in the diagram.
my truck is a 72 ranger xlt short bed , automatic transmission, 390 engine, (which I replaced with a 429) . It DID NOT come with air condition, it has never been wrecked. The ignition switch is the original switch. The wires
are still taped with the factory Ford sealed tape.
Am I looking at something wrong?

One last question, in the diagram am I looking at the ignition switch side of the plugin or the back side of the plugin where the wires are entered into the sochet?
I appreciate all the help, I hope I have not confused or made a mistake on explaining this.
Don't give up on me yet.

[fordman]

72 reference picture is this the plug you have? i think it is. i need tiem to look at this and get in the right frame of mind to get this sorted out. i still have this plug for a few more days. let me see what i can decifer.some basics. the pink wireis the resistor wire to the coil. it stops at the connector (knot) and changes color to red green. and contiunes to the coil. the brown wire going into the (knot) connector. coems from the starter realy small rear teminal.

[crazyhorse]

Mr Fordman that is awesome.That is EXACTLY like mine. thank you.
Is that a red/gold stripe wire in the same socket as the pink wire ?
If it is (and it looks like it is) that is the wire that is cut off coming from the factory molded "knot" that the green wire with red stripe ran into.There is also a solid blue wire coming out of the same factory molded "knot" that is cut. I wonder where the solid blue wire went ?

Fordman thanks again and I think you STAY in the right frame of mind all the time.

[fordman]

i am having troubke because the 70 diagrams dont give a color for the wires. they are a little lcose in th epicture than the 72 diagrams are as to whayt you have. the red with green does hook in with the pink resistor wire. there is a blue wire that should come out of the firewall engine knot. that is to the carb solenoid. if it is still on the truck.

[crazyhorse]

My goodness Mr Fordman you da man.
Is that a red with GOLD or BROWN stripe joining the pink wire in the ignition socket plug?
If so that could be my problem since that is a red with gold or brown stripe that is cut off at the "knot'.

[fordman]

i can see going out to the passenger side inner fender a light green wire with a red stripe on it. but i can t find where it coems from or goes to. by visually looking at it. . on your harness what i would do is to look to see where the other end of the green wire with red stripe is at right near where it is cut off at. and reconnect it. you may have to peal tape to find it. that is the best i can do tonight.