Just another day with this ISX

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by HoneyBadger67, Oct 17, 2020.

  1. HoneyBadger67

    HoneyBadger67 Road Train Member

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    Checked fuses, (both under hood and in batt box), with ohmmeter and they all say they're ok. Not sure how to check for proper amperage.
     
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  3. pushbroom

    pushbroom Road Train Member

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    4 wire plug in top left of ecm. 2 are power two are ground. Check those out with a test light.
     
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  4. HoneyBadger67

    HoneyBadger67 Road Train Member

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    Any idea what the voltage should be? I have a multimeter but no light and, of course, the fuel stop doesn't sell them
     
  5. HoneyBadger67

    HoneyBadger67 Road Train Member

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    Having batteries disconnected for 20min didn't help
     
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  6. Goodysnap

    Goodysnap Road Train Member

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    Should match battery voltage and good ground on each pair.
     
  7. HoneyBadger67

    HoneyBadger67 Road Train Member

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    Update on no ECM:

    Wife reminded me of when freightliner wouldn't start after a visit to speedco. SO...I went through the fuse panel *again* and found one fuse with corroded blades. Changed that fuse and truck starts/runs again. I want to thank all of you for your suggestions and assistance. If my hair wasn't so short, I'd have been pulling it out.
     
  8. Raffito

    Raffito Light Load Member

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    Good that you find the problem! Word of advice: Buy a GOOD test light, it comes in handy when checking fuses or power source. Multimeters can be tricky to use. Be sure to check all fuses.
     
  9. pushbroom

    pushbroom Road Train Member

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    Dont buy a led test light either. The whole point of a test light with an incandescent bulb is to load the circuit which a multimeter or led cannot do.
     
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