Re: Denso upgrade prob
[Re: MNobody]
#1851122
06/17/15 03:29 PM
06/17/15 03:29 PM
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Joined: Feb 2003
Posts: 1,142 Tucson, AZ
cruzin
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I ran both the "Sense and the Bat +" wires to the main lug on the starter relay. The alternator's "Ign" I ran to car's Ignition run wire at the bulkhead. Not using the "Lamp" wire coming off of the Denso alternator.
Last edited by cruzin; 06/17/15 04:30 PM.
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Re: Denso upgrade prob
[Re: cruzin]
#1851131
06/17/15 03:46 PM
06/17/15 03:46 PM
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Joined: Jan 2003
Posts: 10,666 North Dakota
6PakBee
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I ran both the "Sense and the Bat +" wires to the main lug on the starter relay. The alternator's "Ign" I ran to car's Ignition start wire at the bulkhead. Not using the "Lamp" wire coming off of the Denso alternator. This is interesting. I just put a Denso alternator on my tractor and it had only three connections, ignition (or sense), the output (battery), and the idiot light. With this alternator if you don't switch the ignition wire, the battery goes dead. DAMHIK.
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Re: Denso upgrade prob
[Re: MNobody]
#1851197
06/17/15 05:16 PM
06/17/15 05:16 PM
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Posts: 25,618 Rio Linda, CA
John_Kunkel
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Not all Denso's are the same, the Mopar version of the Denso wires just like a roundback/flatback Mopar alternator.
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Re: Denso upgrade prob
[Re: MNobody]
#1851294
06/17/15 08:22 PM
06/17/15 08:22 PM
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Posts: 7,664 IN
ahy
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Thanks guys, much appreciated. Looking around for a place to hook it under there, how about the switched wire to the MSD box? Should be able to sense something there eh? Sounds like a good spot...
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Re: Denso upgrade prob
[Re: MNobody]
#1853045
06/20/15 07:50 AM
06/20/15 07:50 AM
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ruderunner
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The alternator is not internally regulated. You need to connect the regulator wiring like stock, just change the terminals to fit the alternator. IIRC two small ring connectors and one large charge wire.
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Re: Denso upgrade prob
[Re: John_Kunkel]
#1853070
06/20/15 09:52 AM
06/20/15 09:52 AM
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Joined: Jan 2003
Posts: 10,666 North Dakota
6PakBee
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Not all Denso's are the same, the Mopar version of the Denso wires just like a roundback/flatback Mopar alternator.
The Denso I used had the internal regulator. If this is the stock '98 Mopar Denso John had the answer all along.
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Re: Denso upgrade prob
[Re: MNobody]
#1853410
06/20/15 08:54 PM
06/20/15 08:54 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
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How do you have it wired?
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Re: Denso upgrade prob
[Re: MNobody]
#1853598
06/21/15 01:19 AM
06/21/15 01:19 AM
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6PakBee
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Okay, let's start at the beginning. What car are you installing this on and what voltage regulator are you using?
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Denso upgrade prob
[Re: MNobody]
#1854181
06/22/15 08:21 AM
06/22/15 08:21 AM
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Posts: 10,666 North Dakota
6PakBee
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Okay, we have the car and regulator identified, is this the alternator you have? Mopar Alternator
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Re: Denso upgrade prob
[Re: MNobody]
#1854376
06/22/15 03:35 PM
06/22/15 03:35 PM
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6PakBee
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Okay, we got this puppy whipped. I hope the attached sketch covers what is going on. Your stock 1969 setup uses an alternator with a single wire field terminal. The regulator supplies a variable voltage to one end of the field winding through the exposed terminal. The other end of the field winding is internally grounded in the alternator.
The externally regulated Denso (and I hope I got the right diagram, the plug has two wires, a dark green and a dark green with orange?) has an isolated field, both terminals are brought out through the plug. With this arrangement one end of the field is always energized at battery voltage through the first terminal and the regulator grounds the other end of the field through the second terminal to control field excitation.
So the secret is to make the Denso look like the original from a wiring standpoint. You need to ground either one of the two leads coming out of the plug (doesn't matter if it's the dark green or the dark green with orange, the field isn't polarity sensitive) and connect your original green alternator field lead to the other wire. Connect the battery terminal and you should be good to go.
Good luck.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Denso upgrade prob
[Re: MNobody]
#1855131
06/23/15 01:13 PM
06/23/15 01:13 PM
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6PakBee
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Okay, how much voltage do you have on the green lead in the harness? Best to measure it at the alternator but the voltage regulator would work also.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Denso upgrade prob
[Re: MNobody]
#1855591
06/23/15 11:21 PM
06/23/15 11:21 PM
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6PakBee
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Same diagram I found. Look at the diagram I posted. Your electromechanical regulator has no voltage source with the key off. At least the key has to be on for the voltage reading I mentioned. Running would be better as the regulator is then trying to regulate. Grounding through the mounting should be sufficient. But one step at a time.
Last edited by 6PakBee; 06/23/15 11:22 PM.
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Re: Denso upgrade prob
[Re: John_Kunkel]
#1855732
06/24/15 05:25 AM
06/24/15 05:25 AM
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6PakBee
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Electronic regulator upgrade? Oh, boy. Totally different situation. What you need now is exactly what John Kunkel posted replies ago. The Fld(+) and Fld(-) wires in John's sketch are the dark green and dark green w/orange wires from the Denso plug.
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Re: Denso upgrade prob
[Re: MNobody]
#1855932
06/24/15 02:46 PM
06/24/15 02:46 PM
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6PakBee
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Just like eating an elephant, one mouthful at a time. I notice you have the Mallory version of the regulator. I have no idea what the voltage setpoint is on that version. Others I have seen vary from 13.5 to 14.5 so maybe 14.9 isn't unreasonable. I'd try another regulator if you have concerns. The fact that the system voltage is at 14.9 is a good sign that the regulator is regulating. As a note be sure the regulator case is grounded well, a poor ground connection will tend to produce a higher regulated voltage.
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