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09 GMC 3/4 electrical battery, everything issue

Discussion in 'Chevy Trucks' started by jvm81, Jan 23, 2016.

  1. jvm81

    jvm81 Senior Member
    from Midwest
    Messages: 381

    2009 GMC 3/4 regular cab. SnowEx sander. Boss V plow. Everything works great until...

    First issue - sander would come on / off again. Spoke with snowex and really did nothing but take out the motor, lube gear box, put back together and all was good.

    Second issue. Always dead and when you go to run sander with vibrator on the battery gauge would go way down. Then the plow started acting up that it would hardly lift and dim the lights and about kill the truck. So replaced the battery with a new interstates and that seemed to help.

    Third Issue - today. Truck was dead. Not a light would come. Thought well must have left something on, interior light or something. Put the jumper on it and just like that the lights came on and started right up. Went to lift plow, almost killed the truck. Sander works. Shut truck off, dead. Jumper back on, truck starts. Lift plow, ABS lights up, service trailer wiring lights up, battery gauge drops to nothing. All fuses are good. Checked and rechecked. All wires are good. Battery cables are all tight, rechecked and checked again. Then the funny thing, went to shut truck off, got out and it was still running. I couldn't put in drive or anything but I put the key back in and turn it to the on position - off we go. I shut it off, took the key back out and THEN opened the door to get out - truck shut off. So right now that is how it is working.

    Any Ideas??
     
  2. rjigto4oje

    rjigto4oje PlowSite.com Addict
    Messages: 1,289

    Check all of the grounds and coonections physically take them off and clean them .even look at the alternator and starter connections just to be sure. And whats the alternator putting out
     
  3. rjigto4oje

    rjigto4oje PlowSite.com Addict
    Messages: 1,289

    I forgot to mention check for any electric draws you can use an amp meter or a test light. Hook it up between the neg cable and the battery the light should not be on if it is you have a draw you can isolate it by pulling fuses .when you remove a fuse and the ligyt goes out thats the vircut in question
     
    Last edited: Jan 24, 2016
  4. Cosmic Charlie

    Cosmic Charlie Senior Member
    Messages: 228

    Ground Locations ... +-



    G100

    In the Forward Lamp Harness on the Lower Left of the Radiator Core Support

    Power and Grounding Component Views in Wiring Systems


    G101

    In the Chassis Harness, left side of the engine near the generator

    Power and Grounding Component Views in Wiring Systems


    G102 - Except 4.3L

    In the Engine Harness, on the left side of the engine block, #3 cylinder area, below the exhaust manifold

    Power and Grounding Component Views in Wiring Systems


    G102 - 4.3L

    In the Engine Harness, Right Front of the Engine near the Crank Sensor.

    Power and Grounding Component Views in Wiring Systems


    G103 - Gas

    In the Engine Harness, on the Left Rear of the Engine Block

    Power and Grounding Component Views in Wiring Systems


    G103 - Diesel

    In the Engine Harness, on the Right Front of the Engine Block

    Power and Grounding Component Views in Wiring Systems


    G104 - 4.8, 5.3, 6.0L

    In the Engine Harness, on the Left Rear of the Engine Block

    Power and Grounding Component Views in Wiring Systems


    G104 - 4.3 and 8.1L

    In the Engine Harness, on the rear of the left Cylinder Head

    Power and Grounding Component Views in Wiring Systems


    G105

    In the Main Battery Harness, Main Battery Ground on the Right Front of the Engine

    Power and Grounding Component Views in Wiring Systems


    G106

    In the Main Battery Harness on the Right Side of the Engine

    Power and Grounding Component Views in Wiring Systems


    G108 - Diesel

    In the Engine Harness on the left front of the Engine Block

    Power and Grounding Component Views in Wiring Systems


    G109 - Diesel

    In the Engine Harness on the Right front of the Engine Block

    Power and Grounding Component Views in Wiring Systems


    G110

    In the Chassis Harness on the frame to the rear of the left front tire.

    Power and Grounding Component Views in Wiring Systems


    G200

    In the HVAC Harness, on the Right Side of the I/P Near the A-Pillar Below the I/P Top Cover

    Power and Grounding Component Views in Wiring Systems


    G203

    In the I/P Harness, On the Left Side of the I/P Near the A-Pillar Below the I/P Top Cover

    Power and Grounding Component Views in Wiring Systems


    G302

    In the Chassis Harness on the frame to the rear of the left front tire.

    Power and Grounding Component Views in Wiring Systems


    G304

    In the Body Harness, Under the Passenger Seat

    Power and Grounding Component Views in Wiring Systems


    G305

    In the Body Harness, Behind the Drivers Side B-Pillar Trim Near the Bottom

    Power and Grounding Component Views in Wiring Systems


    G306

    In the Body Harness, Behind the Passengers Side B-Pillar Trim Near the Bottom

    Power and Grounding Component Views in Wiring Systems


    G390 (Crew Cab w/Rear Window Defog)

    Defogger Grid Harness, Near C-Pillar

    Power and Grounding Component Views in Wiring Systems


    G401

    In the Chassis Harness, On the Spare Tire Hoist Assembly

    Power and Grounding Component Views in Wiring Systems


    G402 (Export Only)

    In the Chassis Harness, Near the Rear Bumper Assembly

    Power and Grounding Component Views in Wiring Systems


    G403

    In the Chassis Harness, Near the Left Rear Body Mount

    Power and Grounding Component Views in Wiring Systems


    G410

    In the Body Harness, Right Rear Interior of Vehicle Behind the Right Side Cargo Area Trim Panel

    Read more: http://www.justanswe...l#ixzz3koDKQmAZ


    PS- Your Body Control Module may be reset by dis-connecting your battery for 20 minutes +- ... if you haven't tried that - won't hurt to try
     
  5. jvm81

    jvm81 Senior Member
    from Midwest
    Messages: 381

    Thanks - Ill look things over again on Monday. I had one guy tell me it was my ignition - that I would need a new of those put in due to the key thing. Anything to stand on with that idea?
     
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,951

    Your battery was dead, upon restart you'll get all kinds of issues till the truck resets.

    Need to do a parasitic draw test to determine the key off draw issue.
     
  7. jvm81

    jvm81 Senior Member
    from Midwest
    Messages: 381

    Did some more checking. Everything really seems good. My main shop guys is pretty good at this stuff and really didn't notice anything but a fuse out for trailer lights. It was brought to my attention that the ignition switch could be bad? Looks like a $30 part online but would that solve the problems at hand? This morning we had ice. Thinking great that truck better run. I had to jumper pak on it and took right off. But watching gauges religiously I notice battery gauge really drops off when sander and vibrator both on. Shut truck off - its dead - keep jumper pak handy!
     
  8. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,951

    Get your batt and alt tested.
     
  9. Rick547

    Rick547 Senior Member
    from Indiana
    Messages: 535

    What he said!
     
  10. Western1

    Western1 Senior Member
    from MI.
    Messages: 676

    Do you have a trailer plug with constant power? Check plug for corrosion and bad wires.