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1992 dakota pcm #1325109 10/23/12 08:18 PM 10/23/12 08:18 PM
Joined: Oct 2006 Posts: 112 sw mo M meanmothermagnum OP member
meanmothermagnum OP member M Joined: Oct 2006 Posts: 112 sw mo	HELP!!! My pcm is flaking out and the battery charge goes from min to max in a split second. Is there a fix for this other than a new pcm? I have already tried a new alternator.

Re: 1992 dakota pcm [Re: meanmothermagnum] #1325110 10/23/12 08:42 PM 10/23/12 08:42 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Junkyard or ebay a used computer. Easiest way. I know on some computers guys have been able to convert to external voltage regulators.

Re: 1992 dakota pcm [Re: DaytonaTurbo] #1325111 10/23/12 09:01 PM 10/23/12 09:01 PM
Joined: Oct 2006 Posts: 112 sw mo M meanmothermagnum OP member
meanmothermagnum OP member M Joined: Oct 2006 Posts: 112 sw mo	I've called all the local yards and none to be had here. Ebaggers want way more than a new one costs for a used one. Thought I might try someone on here and see if they know of an alternative.

Re: 1992 dakota pcm [Re: meanmothermagnum] #1325112 10/23/12 09:15 PM 10/23/12 09:15 PM
Joined: Jan 2003 Posts: 10,585 Freeport IL USA poorboy I Live Here
poorboy I Live Here Joined: Jan 2003 Posts: 10,585 Freeport IL USA	Convert to an electronic voltage regulator and carry on, until something else craps out on the pcm. Use an ignition hot wire to power the regulator and wire it like the old race cars were done for the electronic regulator. Then disconnect the alt field wire out of the computer and tape it up good. Gene

Re: 1992 dakota pcm [Re: poorboy] #1325113 10/23/12 10:04 PM 10/23/12 10:04 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: Convert to an electronic voltage regulator and carry on, until something else craps out on the pcm. Use an ignition hot wire to power the regulator and wire it like the old race cars were done for the electronic regulator. Then disconnect the alt field wire out of the computer and tape it up good. Gene Just keep in mind the computer will be throwing codes if you do this.

Re: 1992 dakota pcm [Re: poorboy] #1325114 10/23/12 10:07 PM 10/23/12 10:07 PM
Joined: Jan 2003 Posts: 28,399 Posting from 1893 in NW FL TheBlueBeast Too Many Posts
TheBlueBeast Too Many Posts Joined: Jan 2003 Posts: 28,399 Posting from 1893 in NW FL	Quote: Convert to an electronic voltage regulator and carry on, until something else craps out on the pcm. Use an ignition hot wire to power the regulator and wire it like the old race cars were done for the electronic regulator. Then disconnect the alt field wire out of the computer and tape it up good. Gene If not already done this would make a good tech article for the archives. Pictures would be important with the directions.

Re: 1992 dakota pcm [Re: TheBlueBeast] #1325115 10/23/12 10:12 PM 10/23/12 10:12 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	The alternator will have two field wires. Wire it up like this diagram shows. Ignore the blue part, that's just what you would remove if converting from a 1 field alternator to a 2. I would imagine the two stock wires coming off the alternator could be taped up and set aside. At a minimum the computer is going to throw a charging circuit code.

Re: 1992 dakota pcm [Re: DaytonaTurbo] #1325116 10/23/12 11:57 PM 10/23/12 11:57 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Be aware that I have seen alot of Dakota's from 88 to about 94 get corrosion in the wire harness anywhere between the battery and the firewall on the hot feeds. Seen many a PCM's replaced because of this. Had one would overcharge because the PCM 12 volt sense wire was not seeing much more then 3 volts from corrosion in the harness that built up. Ron

Re: 1992 dakota pcm [Re: 383man] #1325117 10/24/12 10:12 AM 10/24/12 10:12 AM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	Also in reference to the above,strip the harness at the Y under the power distribution box next to the battery.There are three wires crimped to one,you will probably find the crimp is corroded to the point it will fall apart if you move it.Regardless,strip the wires and solder and heat shrink them,it will save you a problem later. Also,trying to find a 2nd generation PCM in a junk yard is not easy if you have a 5.2

Re: 1992 dakota pcm [Re: meanmothermagnum] #1325118 10/24/12 10:35 AM 10/24/12 10:35 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	http://shop.advanceautoparts.com/webapp/...?searchTerm=pcm I'm having issues w/ my 88 Ramcharger as well. Good luck at least yours is starting. I'm going to recheck all my wires after work today. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: 1992 dakota pcm [Re: Mr.Yuck] #1325119 10/24/12 11:14 AM 10/24/12 11:14 AM
Joined: Jan 2008 Posts: 2,250 ILLINOIS V volaredon top fuel
volaredon top fuel V Joined: Jan 2008 Posts: 2,250 ILLINOIS	To both OP and Mr Yuck I have computers here for both of those collecting dust... I have 1 for the 88 RC and should have 2 or 3 for the Dakota I know I have a 93 Dak V8 one, and "should" have both a 92 and a 94 V8 in the attic have to dig a bit; I also have a 94/95 3.9 one. the good part is that from 92-95 you can interchange different year computers between them. I am running a 94 M/T one on my 93 Dakota that I converted from an A/T

Re: 1992 dakota pcm [Re: volaredon] #1325120 10/24/12 11:24 AM 10/24/12 11:24 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: To both OP and Mr Yuck I have computers here for both of those collecting dust... I have 1 for the 88 RC and should have 2 or 3 for the Dakota I know I have a 93 Dak V8 one, and "should" have both a 92 and a 94 V8 in the attic have to dig a bit; I also have a 94/95 3.9 one. the good part is that from 92-95 you can interchange different year computers between them. I am running a 94 M/T one on my 93 Dakota that I converted from an A/T Thanks. I let you know if I need it. I know on my 95 Dak the MP computer really woke up the engine. If the 95 works on the 92 I'd get one.

Re: 1992 dakota pcm [Re: Mr.Yuck] #1325121 10/24/12 05:44 PM 10/24/12 05:44 PM
Joined: Oct 2006 Posts: 112 sw mo M meanmothermagnum OP member
meanmothermagnum OP member M Joined: Oct 2006 Posts: 112 sw mo	I would welcome a performance pcm if I could find one. They don't make them anymore and are hard to find in good/usable condition. If you do find one they are stupid expensive and I'm on a cheep beer budget!! Last edited by meanmothermagnum; 10/24/12 05:45 PM.

Re: 1992 dakota pcm [Re: Mr.Yuck] #1325122 10/24/12 07:48 PM 10/24/12 07:48 PM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	Quote: Quote: To both OP and Mr Yuck I have computers here for both of those collecting dust... I have 1 for the 88 RC and should have 2 or 3 for the Dakota I know I have a 93 Dak V8 one, and "should" have both a 92 and a 94 V8 in the attic have to dig a bit; I also have a 94/95 3.9 one. the good part is that from 92-95 you can interchange different year computers between them. I am running a 94 M/T one on my 93 Dakota that I converted from an A/T Thanks. I let you know if I need it. I know on my 95 Dak the MP computer really woke up the engine. If the 95 works on the 92 I'd get one. I have a 92/93 5.2 Mopar Performance PCM if anyonwe needs/wants one.

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