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Plug for heater

Discussion in '7.3L Powerstroke Diesels' started by kenneth ferguson, Oct 19, 2020.

  1. kenneth ferguson

    kenneth ferguson Registered User

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    Good morning everyone I have a question I have a 2003 ford power stroke 7.3 where does the power cord that I plug in go to on motor side? Is it a heating element or something like that? Reason I’m asking is the plug has been left fluffed in numerous times and I’m wondering if I should replace it?
     
  2. Diesel D

    Diesel D Full Access Member

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    ...not sure what "fluffed in" means?
     
  3. u2slow

    u2slow bilge rat

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    If it ain't broke don't fix it.
     
  4. kenneth ferguson

    kenneth ferguson Registered User

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    Lol sorry what I meant to say was it has on numerous occasions been forgotten to be unplugged and yanked out of cord when driven off.
     
  5. 79jasper

    79jasper Chickenhawk

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    If it looks fine, leave it alone. But they are very simple to replace and pretty cheap.
    Google "7.3 powerstroke marinco mod."

    Sent from my SM-N960U using Tapatalk
     
  6. kenneth ferguson

    kenneth ferguson Registered User

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    Any temp below 50 degrees I have to turn ignition on and off 5 times to get it to fire up any ideas? Truck has Over 350,000 miles
     
  7. 79jasper

    79jasper Chickenhawk

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    I don't know you're exact method. But I'll throw out some knowledge.
    The glowplugs will run for 2 minutes. The light doesn't have anything to do with actual glowplug operation.
    But you likely have some glowplugs burned out.

    Sent from my SM-N960U using Tapatalk
     
  8. Booyah45828

    Booyah45828 Full Access Member

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    Power cord goes to the block heater, which is screwed in above the oil filter.

    No idea what fluffed in means, but you can cut the current 3 prong end off, and use a 15 amp plug in available from any hardware store on the wires.

    You could also replace the entire cord, Sometimes they go bad for whatever reason.
     
  9. u2slow

    u2slow bilge rat

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    Check the block end of the cord before blindly repairing the other. The plug at the block end can corrode and even melt from poor continuity.
     
  10. greenskeeper

    greenskeeper Full Access Member

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    The power cord goes to a block element near the oil filter. The cord can be purchased new or the old one can be repaired.

    If you're glow plug system is working correctly, there really isn't any need to "plug the truck in" to warm the block. I've started at -20F with only glow plugs.
     
  11. greenskeeper

    greenskeeper Full Access Member

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    Do you know the service history of the glow plugs and relay? If not I would replace all 8 glow plugs with OEM and upgrade the relay to the larger stancor unit.
     

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