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Old 08-30-2005, 10:12 AM
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Follow Up; "Alternator or other electrical problem"

After looking at the wires and the wiring schematic that came with the wiring harness and where they were routed I noticed the following. The alternator has one wire (spade connector) that comes from the voltage regulator. From the terminal block there are two purple wires joined together; one goes to the alternators voltage regulators spade connector, the other purple wire goes to the ballast resistor. One the opposing side of these purple wires, a purple wire continues on to the voltage gauge. There is an orange wire that goes to the output side of the alternator post. This wire ends at the terminal block. There isn't any wire(s) coming off of the opposing side of the terminal block for this orange wire. I looked at the starter solenoid with a mirror and noted one of it's posts was marked with an "R" and no wires going to it. I noticed that with the ignition key in the OFF position there wasn't any power to this orange wire or the purple wires. With the ignition key in the ON position there was power at the terminal block for the purple wires. With the engine running there was power to this orange wire and purple wires.

Is this orange wire suppose to be attached to the solenoid post marked with the "R" ? According to the diagram this orange wire is the "Alt Charging wire".

Original post dated; 8/27/2005 "Alternator or other electrical problem"

Any help would be appreciated. Thanks

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Old 08-30-2005, 03:12 PM
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Wiring issue...

Hard to sort out the wires based on your post.
Here's how the "R" post on the starter SHOULD be wired:

A wire from the "R" post should connect to the (+) post on your coil. The (+) post also has another wire from one end of your ballast resistor. The role this wire from the "R" post plays is to BYPASS or SHORT OUT the ballast resistor when the ignnition key is in the CRANK position (your're trying to start the motor). This is done to give the coil FULL VOLTAGE when you're cranking to aid with starting. Then, when not cranking, the ballast reduces the current the points see while running to extend their life.
The other end of the ballast resistor should only have power when the ignition key is ON.
Obviously the "S" lead on the starter gets power when the key is on CRANK position.

Hope this helps.

Tom
Quote:
Originally Posted by Claude
After looking at the wires and the wiring schematic that came with the wiring harness and where they were routed I noticed the following. The alternator has one wire (spade connector) that comes from the voltage regulator. From the terminal block there are two purple wires joined together; one goes to the alternators voltage regulators spade connector, the other purple wire goes to the ballast resistor. One the opposing side of these purple wires, a purple wire continues on to the voltage gauge. There is an orange wire that goes to the output side of the alternator post. This wire ends at the terminal block. There isn't any wire(s) coming off of the opposing side of the terminal block for this orange wire. I looked at the starter solenoid with a mirror and noted one of it's posts was marked with an "R" and no wires going to it. I noticed that with the ignition key in the OFF position there wasn't any power to this orange wire or the purple wires. With the ignition key in the ON position there was power at the terminal block for the purple wires. With the engine running there was power to this orange wire and purple wires.

Is this orange wire suppose to be attached to the solenoid post marked with the "R" ? According to the diagram this orange wire is the "Alt Charging wire".

Original post dated; 8/27/2005 "Alternator or other electrical problem"

Any help would be appreciated. Thanks
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Old 08-30-2005, 04:46 PM
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Fleet 49...Regarding the output side of the alternator. Once I attached a 10 ga. wire to this post, where do I attach this alternator charging wire? Do I attach it to one of the posts on the solenoid or where the battery cable is attached to the starter. I am new at this electrical stuff, but learning the hard way. Thank you.
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Old 08-30-2005, 06:50 PM
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Wiring

Quote:
Originally Posted by fleet49
Hard to sort out the wires based on your post.
Here's how the "R" post on the starter SHOULD be wired:

A wire from the "R" post should connect to the (+) post on your coil. The (+) post also has another wire from one end of your ballast resistor. The role this wire from the "R" post plays is to BYPASS or SHORT OUT the ballast resistor when the ignition key is in the CRANK position (you're trying to start the motor). This is done to give the coil FULL VOLTAGE when you're cranking to aid with starting. Then, when not cranking, the ballast reduces the current the points see while running to extend their life.
The other end of the ballast resistor should only have power when the ignition key is ON.
Obviously the "S" lead on the starter gets power when the key is on CRANK position.

Hope this helps.

Tom
=================================================
Doc here,

DO NOT wire The Alternator<---READ) "R" wire in this fashion!!!!!!!!!

The "R" wire from the alternator<---READ) is for the resistor on the original Charge light system ONLY!!!

If you hook it up to the ballast resistor <---READ) or coil...It will start JUST fine...and NEVER SHUT off .. until the Alternator burns up...

The Ballast resistor serves one and one purpose in life only...to reduce the impact of current on a points type ignition and coil during "Points Closed mode" (a dead short to ground)..and is present in BOTH Crank and run modes..

Instead of the Ignition getting a full 12 volts at 6 or so amps the ballast knocks it down to (under load, points closed) 6 to 9 volts at somewhat lower current so as not to pit the points, or overheat the coil...If your HEI, you don't EVEN require one...nor should you require a secondary Ignition wire unless the new source voltage to the HEI drops out under crank..then you will need it OR to move your HEI BATT terminal to a new source voltage that remains constant under "Crank" modes..

Doc
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Old 08-30-2005, 08:37 PM
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Thanks Doc; How do I get this alternator to charge the battery? Do I run a wire from the output post of the alternator to the solenoid (not the post marked with an "R") or to where the battery cable is attached to the starter?
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Old 08-30-2005, 09:59 PM
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wiring

Doc here,

This should be what you need...



If it's the 4 wire...

This is a Delco right ... not some import??

Doc
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Old 08-31-2005, 05:54 AM
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Sorry for confusion!

I was NOT referring to the alternator when discussing the "R" lead, but the STARTER.

Diagram helps for sure.

10GA charging wire should go from alternator output to battery stud on the starter.

Tom
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Old 08-31-2005, 08:21 AM
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Here is a photo of the alternator. It is a Motorola.
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Last edited by Claude; 08-31-2005 at 08:32 AM. Reason: Photo being inserted
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