walker electrical problem

Discussion in 'Mechanic and Repair' started by Greenery, Sep 14, 2009.

  1. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    Ok i'm stumped. I went to start my 03 mcghs with a kohler 18 and it just clicked so I thought dead battery jumped it and it would run a minute or two then die. then I jumped it again and it would die as soon as i would engage either the blades or fsc so I unhooked the safety switches and got it to work for about ten minutes then it just died again. jumped it again and got it over to the garage and i heard a pop shut it down to take a look and the battery cover had shot off. so I replaced the battery hooked everything back up like it's supposed to be and turned the key and smoke shot out of the time delay module. So I thought that must be the problem got a new one put it in and poof that one shot out a puff of smoke too. I've been going through the wires looking for shorts but can't find any. the terminal on the time delay module thats turning black is the one with the brown wire that goes to a relay and also the fsc switch. Any ideas?
     
  2. ericg

    ericg LawnSite Silver Member
    Posts: 2,556

    Greenery, the relay that the brown wire goes to is the start relay. There is also a brown with a white tracer wire connected to the same terminal as the brown wire that goes to the fsc switch. From what you describe, you have a direct short. Did you disconnect the start relay and check for a ground condition on the red, brown and two yellow wires? Have you checked the relays and the back of your ignition switch for corrosion?

    Eric
     
  3. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    I did not check for a ground condition on the red, brown and yellow wires. How do I do that? I do have a multi meter im guessing i would use that to check. I did clean up the relay connections but not the ignition switch which I will do. I really appreciate your help .:usflag:
     
  4. ericg

    ericg LawnSite Silver Member
    Posts: 2,556

    Place your multi meter selector on ohms and put one lead of the meter on a good ground like the negative terminal of the battery and use the remaining lead to check each wire for ground. If your meter has an audible selection to check continuity, use that as the meter will beep when you have continuity to ground.

    Eric
     
  5. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    I'm assuming that I don't want any of those wires grounded and if one is then that means a short somewhere on that wire? if it's grounded what will the meter show?
     
  6. ericg

    ericg LawnSite Silver Member
    Posts: 2,556

    if you're utilizing a digital meter, it would be a reading like .001. If it is a meter with a needle, it will read near zero. The best thing to do is go to the Walker website and download the parts manual for your machine which has the wiring diagram. Print it out and follow the wiring from the brown wire to the relay etc. Its hard to diagnoses electrical problems over the web. With the wiring diagram and a multi meter, you will find the problem fast. Click on this link and it will take you to the manual for your machine. The wiring diagram is on page 62.

    http://www.walkermowers.com/Manuals/model_c_twin/6000-9_pub.pdf

    Eric
     
  7. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    Again thank you for the help. Ok i'm getting somwhere if i unplug the connecter from the time delay module and test the brown wire i get a beep meaning that wire is grounded so I unplugged the connecter going to the fsc switch and then it doesn't beep when i retest it so my short must be between the switch and the connecter for the time delay module. how do I test the switch? I did place each lead on the two wires of the switch and it didn't beep.
     
  8. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    ok so I was double checking it and when I activate the switch it stops beeping which i'm guessing is what it's supposed to do . So my problem is probably else where.
     
  9. ericg

    ericg LawnSite Silver Member
    Posts: 2,556

    Greenery, if I remember the wiring, the brown wire goes to the start relay and the brown with white stripe wire goes to the fsc switch. What if you leave the fsc switch disconnected and try and start the machine, even if you have to jump the starter solenoid? Again, if you start tracing the wires based on the wiring diagram, it should lead you to the right place. In addition, relay "C" is a delay relay that works with the time delay module. There could be a problem there as well which is causing a ground or short on the module.

    Eric
     
  10. Greenery

    Greenery LawnSite Senior Member
    Posts: 512

    well I spent hours trying to find the problem with no luck. so what I did was just unplugged the time delay module and the associated relay and it works fine just no safety switches which I know is a bad deal. It still won't start if the blades or fsc are engaged but when running I can get off the seat with both engaged and it will stay running. I'm leaning towards somthing wrong with the ignition switch but i'm just not sure. the weird thing is the terminal that blows on the time delat switch is the brown wire which I do believe is just a ground for the fsc switch with the switch activated it is grounded and with it unactivated it is open.
     

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