Plug for heater

kenneth ferguson · Oct 19, 2020

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?

Diesel D · Oct 19, 2020

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

u2slow · Oct 19, 2020

If it ain't broke don't fix it.

kenneth ferguson · Oct 19, 2020

Diesel D said:
...not sure what "fluffed in" means?

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.

79jasper · Oct 19, 2020

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

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kenneth ferguson · Oct 19, 2020

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

79jasper · Oct 19, 2020

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.

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Booyah45828 · Oct 19, 2020

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.

u2slow · Oct 20, 2020

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.

greenskeeper · Oct 20, 2020

kenneth ferguson said:
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?

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.

greenskeeper · Oct 20, 2020

kenneth ferguson said:
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

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.

Plug for heater

kenneth ferguson

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Diesel D

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u2slow

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