Question about 1988 Dodge B350

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Alternator not charging: 1990 B-350, 5.9

I get a code 41 from a scan. replaced the alernator, all wire connections clean and good. what can I do?

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  • rwil Dec 31, 2008

    Brand new. I even took one back because it didn't work.

  • rwil Jan 01, 2009

    I believe the voltometer is working correct.It read charging before this problem. When I scanned the computer I got the 41 code. I hadn't had that code before. I think the alternator is new although the original was a Boshe. I recharged the battery the other day and when I ran the truck today the voltage didn't drop very much after running for half an hour w/ the headlights and heater blowing on high. Also, one site said that there's a voltage regulator seperate from the alternator. It's supposed to be "under the engine cover, on the passenger side firewall". I couldn't find it inside or outside on the firewall. Any ideas?

  • sagittario22 Jan 01, 2009

    same problem on a '91 15 passenger., new (rebuilt) alternator, new battery,,, won't recharge at all. don't know about the wiring.

  • Anonymous Jan 04, 2009

    I have a 1991 dodge dakota with the same problem.

  • rwil Jan 08, 2009

    I checked the main (dark green) fusible link, it's still in tack. I misplaced the wiring schematic but I know there are 4-5 fusible links that spur off of it. My plan is to check the other links. Seems like it has to be a bad connection in that area.

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  • 176 Answers

Three sticks of dynamite might help..just a litlte humor..have no idea...then again all the codes from the computers can't be trusted

Posted on Dec 29, 2008

  • 1 more comment 
  • Terry Engel Dec 31, 2008

    When you replaced the altyernator was it rebuilt or brand new, or form a bone yard?

  • Terry Engel Jan 01, 2009

    When you bought this curent alternator.did you have them bench test the piece and make sure it was working?



    If the alternator is good, it could be your guage is defective...electrical problems are the most dificult to solve, but don't give up..



    Let me know what brand alternator you have, and if it's been rewound, or if it comes straight from the manufacturer...please make sure you ask if it's new or refurbished......that one question can save you alot of headaches.



    I'll work on this one, and get back to you when you let me know what you have.



    Thanks for letting us at FixYa.com help you.

  • Terry Engel Jan 01, 2009

    This one is gonna take me a little while to figure out, and as far as the regualtor position, I'll check that as well and get back to you.



    Sorry I can't give it to you right now, but I will get the answer to you..that I promise.



    Thanks again from FixYa.com



    Terry

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1 Answer

Code 41


the computer controlled alternator is a very good and reliable circuit-if your engine ground is good from the battery negative terminal and your positive charge wire and field wiring tiny hold down nuts are not loose for some reason-and your alternator belt tensioner is not stuck in a loose belt position-you probably just need a replacement alternator

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I have a 41 code what do i need to check to fix


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so it can be BAD PCM , bad ALT or bad wiring.
id check the fuse link,, for blown, and connections, then test the alternator. PCM last

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I have a code 41 on my 93 grand chorkee 5.2 4x4


Fault Code 41

Description: Alternator field control circuit open or shorted
Power loss light: Off
Limp-in mode: None

Possible Causes
* Bad connection or wiring - Check the wiring and connections between the logic module and the power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

* Bad voltage regulator circuit - See Diagnosing Your Charging System

Diagnostic Method:
* Trigger Parameters
- Near 0V or near 12V not detected when the field coil driver is turned on or off, respectively

* Results If Component Fails
Fault code 41 is stored. If the condition persists, it will eventually result in a fault code 46 or 47.


Good luck.

Apr 12, 2011 | 1993 Jeep Grand Cherokee

1 Answer

I have a code 41


Fault Code 41

Description: Alternator field control circuit open or shorted
Power loss light: Off
Limp-in mode: None

Possible Causes
* Bad connection or wiring - Check the wiring and connections between the logic module and the power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

* Bad voltage regulator circuit - See Diagnosing Your Charging System

Diagnostic Method:
* Trigger Parameters
- Near 0V or near 12V not detected when the field coil driver is turned on or off, respectively

* Results If Component Fails
Fault code 41 is stored. If the condition persists, it will eventually result in a fault code 46 or 47.


Nice Jeep, I have the same 5.2L V8; Good luck (remember to rate this answer).

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