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Thread: Broken down and need to get to work tomorrow please help

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    Broken down and need to get to work tomorrow please help

    Had a friend try to help me fix my front axel, he welded something and now Jeep won't start (2007 Jeep Liberty)
    Apparently he/we did not know about disconnecting the battery before welding, I'm being told I most likely need a computer
    Anybody have one, I'm in desperate need , please help if you can!!!!!!!
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    Broken down and need to get to work tomorrow please help

    Have you disconnected the battery now and allowed the computer I reset itself ?
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    Yea, we tried that, I even tried to reset with an ODBII reader, no go!!!

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    Take Barbie instead
    IM GOING TO FECAL IN YOUR GARDEN

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    Battery has full volts and you've tried to jump it? Key may have been de programmed, does it have the SKIM system?
    And im assuming you've gone through all your fusing?
    Last edited by gnomeo; 07-20-2014 at 03:47 PM.

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    Maybe its mad cause it hasn't had a car wash

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    Assuming you haven't done all of these steps:

    Disconnect the battery terminals. Touch them together. Let the battery sit disconnected for a bit while you do the rest.

    Start looking for blown fuses.

    I'd also consider swapping the horn relay and starter relay.

    Then connect the +, followed by the - battery terminals.

    Try starting it.

    If still no go, try in neutral (I'm assuming it's an auto).

    There's generally a diode that prevents running current the wrong way through the computer. That being said, your buddy might have fried it when he welded on it, but I don't think that's likely. If you still have your stock control arms the front axle is at least somewhat isolated from the body by Clevite control arm bushings.

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    Hustler, tried all of that, but thanks for the reply

    Gnomeo, shouldn't you be in bed, don't you have a panel to get finished EARLY tomorrow.

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    Quote Originally Posted by YjCrazy View Post
    Gnomeo, shouldn't you be in bed, don't you have a panel to get finished EARLY tomorrow.
    No panel here

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    If you are communicating with ECM (are you?) and there are no codes, that is a good sign. First things first. Do you have spark and can you hear the fuel pump (do you have fuel pressure)?

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    Quote Originally Posted by hustler View Post
    That being said, your buddy might have fried it when he welded on it, but I don't think that's likely.
    I have seen this happen on our engines before. I tell all my customers to completely disconnect the ECM when welding.
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    Update: Vehicle has gone to the stealership.

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    this is about to get very expensive
    a learning experience is one of those things that says, you know that thing you just did...don't do that again.

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    Broken down and need to get to work tomorrow please help

    Yup. ECM. 4-5 hundo easily.

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    Broken down and need to get to work tomorrow please help

    ^ I'm going to guess more. I called about a PDC and FCM for the Caravan the other day (common problem parts on mid 2000s Chrysler vehicles and dealer only - no aftermarket replacements as of now) and they want $740 for a PDC and $500 for the FCM, I would expect an ECM to be more than those and we aren't even talking labour yet.
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    Re: Broken down and need to get to work tomorrow please help

    Quote Originally Posted by igotafrigginjeep View Post
    ^ I'm going to guess more. I called about a PDC and FCM for the Caravan the other day (common problem parts on mid 2000s Chrysler vehicles and dealer only - no aftermarket replacements as of now) and they want $740 for a PDC and $500 for the FCM, I would expect an ECM to be more than those and we aren't even talking labour yet.
    And with that from now on I'm following Joe's instructions.
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    Listen to the wise Drizit
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    There Must have been a time when we could have said no.

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    Quote Originally Posted by Drizit View Post
    And with that from now on I'm following Joe's instructions.
    The scary shit is, in our case it has nothing to do with welding or anything we did, just a common issue on Chrysler vehicles in the 2000s (not sure exact range of years but ours is a 2007, the model year range is 02 - 07 and I have read they are all affected - Intrepids are another one I have read about with the same issue)...internals on the PDC go for a shit, printed circuit board (no wiring inside at all) with traces that burn out). Our main issue right now is a lack of horn function, I was able to trace wiring from the horn switch all the way through the PDC to the FCM and there is no issue there, tracing the wiring from the PDC to the horn shows the same thing - no issues...from the pins for the FCM (soldered direct to the cicuit board inside the PDC) to the output of the horn relay (also soldered direct to the circuit board) there is no continuity, meaning broken trace.


    To give an idea of how common it is, when I called the dealer to price it out (small town dealer close to the northern ranch) they had the PDC in stock...if you ask me a PDC is a VERY odd part to keep IN STOCK. I have since spoken to a family friend who owns a repair shop and he says he replaces 3 or 4 Chrysler PDCs a month.


    Not really related to the issue in this thread, just wanted to clarify our issue had nothing to do with welding and my previous comments about pricing was just to put into perspective what the potential cost of repair would be in this case...however, I really hope the PDC issue doesn't affect the TJ/LJ.


    Following Joe's advice is probably best...I would probably disconnect the BCM as well.

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    Didn't think the issue with the mystery machine were from welding... Its just the price that made my jaw drop a bit. And of course with our delightful new odb2 etest a pdc from a part out or scrap yard is probably going to cause issues as the vin won't match

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    Quote Originally Posted by igotafrigginjeep View Post
    Following Joe's advice is probably best...
    That'll eventually make it into my sig...

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    Quote Originally Posted by EngineerJoe View Post
    That'll eventually make it into my sig...
    You should, it has a nice ring to it

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