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Recent content by CotterFCattle

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    Cat 257B Aux hydraulics only work in one direction

    Hey everyone just wanted to give an update. My new ecm came, I plugged it in, and it works like a dream cause glad our diagnostics panned out! Thanks for your help, hopefully with having the resolution and everything someone else can use this thread to fix theirs. Also just fyi….. a...
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    Cat 257B Aux hydraulics only work in one direction

    I have a feeling there will be some sort of cover on the plug that, once tampered with, will void returns. I made sure to buy one preprogrammed, I gave them my machine info so they could program. Crossing my fingers, I will let you know the result!
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    Cat 257B Aux hydraulics only work in one direction

    Thank you that gives me a little more confidence. I forgot to report back but I bit the bullet and ordered an ECM. $1200 but they do offer returns surprisingly. I am crossing my fingers that fixes it. Even with all our testing I feel nervous!
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    Cat 257B Aux hydraulics only work in one direction

    What other functions does that ecm control?
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    Cat 257B Aux hydraulics only work in one direction

    And yes I know this is not a fix anyone would probably recommend. I would like to do it in a way that I could easily restore it to factory and replace the ecm down the road but not have to spend $1200 or more right now. Feel free to tell me if I’m totally wrong.
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    Cat 257B Aux hydraulics only work in one direction

    Ok heres where we’re at: I disconnected the connector at the ecm and used my 12 volt battery to pin 42 and 40, then 42 and 58. Both solenoids function properly so I have determined that the wiring from the ecm to the solenoids is functioning correctly. I also retested and the wiring from the...
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    Cat 257B Aux hydraulics only work in one direction

    I am having trouble with the function that typically worked acting strange now, I am going to run jumper wires from the ecm to those two solenoids to make sure there isn’t a wire issue between the ecm and the solenoid. Sound like a good idea?
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    Cat 257B Aux hydraulics only work in one direction

    Sorry for the delay, I wasn’t able to work on it yesterday. Here’s where I’m at: Took a 12 volt battery and energized both solenoids. One was working the other was not. I took the non working one apart and cleaned it up and that solenoid now works. I started the machine and used my outside...
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    Cat 257B Aux hydraulics only work in one direction

    Yes, I made sure to test on the side of the plug that would go up to the handle. This machine has 4 buttons left and two buttons and the thumb wheel on the right. Will that switch not working on the left handle affect the thumb wheel though? Yes they tested good. The grapple is on, I will run...
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    Cat 257B Aux hydraulics only work in one direction

    Ok I am beyond confused now. Here’s what I found tonight in following your directions: Disconnect the 12 pin connection LH handle and test for continuity on pins 11 and 12. No continuity with the bottom left joystick button pushed or released. Suggests that switch is bad. I did however get a...
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    Cat 257B Aux hydraulics only work in one direction

    Correct, the past owner told me it didn’t work and at the time I was not too concerned. He acted like it wasn’t worth fixing for him but wouldn’t say how much he looked into it.
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    Cat 257B Aux hydraulics only work in one direction

    Ok so to test this I can have the 12 pin disconnected for both these tests? Or I need to probe from the back and leave them connected?
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    Cat 257B Aux hydraulics only work in one direction

    Ok I will do that. So you’re saying if it worked differently with those disconnected there could be a solenoid issue right? What is that specific ecm called and what is the part number for it?
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    Cat 257B Aux hydraulics only work in one direction

    Ok these numbers line up with what I am seeing as well. Between 40 and 42 it shows nothing in the center position. When I push the switch down it shows -2.65. When I release the button it does not return to 0. When I push the button up it returns to 0 Between 42 and 58 it shows 0 with the...
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    Cat 257B Aux hydraulics only work in one direction

    ok, we tested as you specified. Pins 2 and 3 deliver: - 4.04-4.09 in center position - 1.9 in down position - 6.28 in up position Testing between pins 52 and 53 I get the exact same numbers with several repetitions and very minimal change. What pins do I use to check coming out of the ecm? Philip
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