wiring

Discussion in 'Magnum Engine Swaps' started by rbkt65, Dec 25, 2017.

  1. rbkt65

    rbkt65 New Member

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    who is doing wiring harnesses? have a 98 ram 1500 and thinking of swapping 5.2 into duster/dart. not sure about removing wires myself. have ordered a used 98 service manual to have on hand. What about the pcm? have heard than manual one is needed. new to this kind of action. thanks in advance.
     
  2. Bobzilla

    Bobzilla Well-Known Member

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    There is a lot of these swaps out there, and many are done different ways. The factory PCM from an automatic truck will work fine to run the engine without the trans plugged into it, it will just have codes stored. SCT software has the capability to turn off the transmission functions in the PCM too, so talk to someone who does the tunes and see if they will do it this way. The harness seams to scare people sometimes, but really all you need is the wiring diagrams for engine controls and connector end views. Any wires for four wheel drive or any such feature you are not using can be removed. You must keep all sensors used to run the engine such as as TPS, MAP, O2, ECT, IAT, crank sensor, cam synch sensor (distributor), and outputs such as IAC, fuel injectors, etc. Not that bad to do the harness yourself, and if you make a mistake, just splice it back in. I suggest for the first one you do, remove the covering and identify the wires you want to keep with masking tape, then write the function of that circuit on the masking tape, such as TPS ground, TPS 5 volt reference, and TPS signal. Saves rework this way.
     
  3. JDMopar

    JDMopar Well-Known Member

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    When you get the factory service manual, if you will make me some good, clear copies of the wiring diagrams and pinouts.....I'll be more than happy to shoot you some $$ for the trouble. I have a 98 model 5.9 and all of the under hood wiring from a 3500 manual transmission truck. I'm wanting to put it in my old beater truck. If you just want to buy a harness, I think Hotwire Auto in Arkansas is the only ones doing it right now. Someone said Magnum Mopar went out of business.
     
  4. Bobzilla

    Bobzilla Well-Known Member

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    You can buy digital service manuals including wiring diagrams from sources such as Rockauto.com. I would not recommend anyone offer or request buying or selling copies out of published service information, in case that is copyright protected information. Just buy it from a legit source.
     
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    • aaadave

      aaadave Well-Known Member

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      iv'e heard some people have trouble with an auto computer, but iv'e been running my 01 5.2 in a 72 dart with the 904 for 3 years now without any problems, and no, i never hooked my oil sending unit to the computer, so it doesn't need to see the pressure. then again, easy rider never could get his right till he got a manual computer. go figure. lol. mine's a 5.2, so maybe there's a difference in the 5.9. i will tell you this, if you have a factory security system, you'll have to get that taken out. if i can help, just ask. dave.
       
    • 67Dart273

      67Dart273 Well-Known Member

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      You are gonna find that "making copies" of the factory diagrams is not that easy. They are drawn over many many pages, strewn all over 'ell. SOMEWHERE, someone on here came up with a "condensed" diagram of just the ECU related.
       
    • JDMopar

      JDMopar Well-Known Member

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      Thanks Del. I'll dig around some more when the time comes. I just need it good enough, that my old tired eyes can figure out what needs 12v, what needs 12v switched, etc.
       
    • Bobzilla

      Bobzilla Well-Known Member

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      Look up the donor vehicle on Rockauto.com, then I think it was listed as literature under the tools tab. Around twenty five bucks typically, then you can zoom in on your computer and print copies for your personal use.
       
    • Tooljunkie

      Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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      So am i getting this right, a manual trans computer would be a better choice? I bought a 94 2500/5.9 annd manual trans. If i transplant it into my power wagon then i free up a solid engine for my dart. Sorry, didnt mean to hijack but i would love to see a thread that covers this. Including retaining stock efi.
       
    • aaadave

      aaadave Well-Known Member

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      the 92-95 was obd1 system. the transmission wasn't computer controlled other than lock up and overdrive. i dont think a 94 computer cares if it's auto or not.
       
    • onefine89

      onefine89 Member

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      From what I'm seeing of the manual is green wire with brown stripe is 12 volts key on and there's a red wire with white stripe 12 volts constant and a few grounds.I don't remember the fuel pump color .I haven'tdone this yet but that's what I'm going to try .
       
    • onefine89

      onefine89 Member

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      Also if someone needs a vin number to get a pcm flash for a manual transmission let me know.I've also go a pdf of fsm for 2001 I'll gladly email to anybody. Take note it's a huge file at least 2600 pages
       
    • Bobzilla

      Bobzilla Well-Known Member

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      PCM fuel pump relay control for 1999 model year is listed as brown with white tracer. Don't remember if it was same color for different years. Also, I don't recommend trying to share VINs for reprogramming. Just use the VIN that is already programmed into your PCM.
       
    • rbkt65

      rbkt65 New Member

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    • rbkt65

      rbkt65 New Member

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      No onefine89, have not gotten anything done as I had to prepare to get a complete new left knee installed. Arthritis ate it up from 50 yrs of mechanicing. Hope to get back on it in 4 to 6 weeks or when doctor releases me. Will update on conversation as I get more info.
       
    • 71d

      71d New Member

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      Is there a company that takes a wiring harness for a 5.9 Dakota RT and matches it up to a 1971 Dodge Dart?
       
    • jedrattle

      jedrattle Well-Known Member

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      There used to be a company that did it for Abodies. But I can't seem to find them now