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From 1989-1991 Ford used this glow plug harness in the F250,  F350, F450 super Duty, F59 trucks that had International 7.3L motors.  We build this harness as close as possible to the stock harness that Ford supplied with the truck. 
The original Harness had a special Ford connector that, by now has burnt up in almost all cases . Replacement connectors are not available anywhere.
We supply a new connector that you will install at your fire wall.   This New connector replaces the one on your fire will and is much more appropriate for the electrical loads placed upon it.

Connector directions included and wiring schematic included.
Ford 7.3L Glow Plug wiring Harness (1988-1991)
Model(s): 6.9L/7.3L
T444E motros within the serial number range 634234 and 661894 use this relay in the glow plug controller assembly. This relay is mounted directly to the glow plug timer which is located on the rear of the intake manifold under the air cleaner assembly.

Mechanic Tip:

If your motor is hard starting this relay could be your problem. Got a lot of smoke after starting?  To test your relay, connect your test light across the two little terminals and activate the glow plugs by turning on the ignition. If your test light comes on, the signal to the relay is good. Now connect your test light's clip to engine ground. With the ignition off again, touch each of the big terminals on the relay. One will cause the test light to light - this terminal is connected to battery positive. Now, cycle the glow plugs on again. The opposite big terminal should now be getting power. If not, the relay is bad.
Relay - Glow Plug Controller Relay for 7.3L IDI - T444E Motors NOS
Model(s): 6.9L/7.3L
Easy to use and hook up.  Medium duty switch.  Great way to turn on or off a electrical device. 
ON-OFF two position switch 12 volt 15 amp.
Switch -Toggle - medium duty -12 volt 15 Amps
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
International 4600, 4700 and similar equipped with 7.3L (T444E) diesel motor use this glow plug.

These years to the 7.3L motor take either a spade type connector or a bullet type connector glow plug.
Glow Plug- With Spade Type Connector for T444E
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Price: $299.95 Price: $59.95 Price: $4.45 Price: $41.95
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Air filter for 7.3 IDI (T444E) MOTORS

Style: Air Filter with Wrap 
Service: Air 
Height: 6.937 
Outer Diameter: 11.500 
Inner Diameter: 8.625 
Ends: Plastic 
CFM: 170
Air Filter with Outer Foam for T444E
Model(s): 6.9L/7.3L
This is a high quality school bus style PA horn. These speakers are loud and clear!
PA Speaker - PA Horn
Model(s): 6.9L/7.3L
This module was used on the glow plug harness of the 7.3 International diesel engines used in Ford F250 Pickup trucks.  Water in fuel sensor.
F250, F350, E250, E350
Water in fuel sensor - Module for Ford glow plug harness
Model(s): 6.9L/7.3L
Extent the life of you battery with these protection boots. Stops corrosion which causes voltage lose.
BatteryTerminal Protector Boots for International 4700
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Price: $29.95 Price: $36.00 Price: $65.95 Price: $3.98
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12 volt 16 amp Push ON - Pull OFF switch. 
Very cool screws that tighten and hold the wires in place. 
Only requires a 5/16th\" hole to mount.  A very small switch for the amount of amps that it provides.
Push Switch, Push (on) / Pull (off)
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Very heavy duty switch. 20 amp 125 volt, two position on-off.  This switch has 4 poles. Two separate incoming and two separate outgoing. 

Good switch for lighting or anything that draws a lot of power.
Switch - Heavy Duty Toggle
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
This is an aftermarket pad for the brake and clutch pedals used in International 4000 series medium duty trucks.
Brake or Clutch Pedal Pad - International 4700, 4600
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Update thoes old turn signal lights  with Ultra bright 42 LED turn signal light.  Amber on one side and red on the other.  Great upgrade in safety and  matches the old styling. Amber on one side and Red on the other
Turn signal LED New
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Price: $3.99 Price: $9.80 Price: $10.23 Price: $59.96
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This product will fix a cracked block. Or a cracked head. Or glue a fan belt back together.  The glue is Great but the grey and black powder that comes with it is AMAZING.   If you have a hole in a valve cover or crack in a block or head, or a broken carburator core. Poor the powder into  fill the void.  Then you put a few drops of the glue onto the power.   The powder and glue work together to create a new compound that is hard as a rock in 10 seconds and will fill in a hole like bondo but much much harder.

We just keep getting success stories from customers about what this stuff will fix.  We just heard from a customer that fixed a large hole in his antique radiator.   He was very happy.
Q-bond glue/gap filler - Fix a Cracked Block
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Prevents battery corrosion.  If you have tractors with batteries, this spray will keep your terminals clean and  your batteries in good shape. Seals and protects. Works great on 6 and 12 volt. Can be used on all connectors.
Protect Your Battery Terminals - Spray
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Great little switch, 12 volt 15 amp.  This switch is ON-OFF-ON .
Medium duty for most anything you would want to switch.
Toggle Switch - Medium Duty - 3 pole
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Protect your wiring. This stuff is great.  It fuses together permanently upon contact with its self . Available in red or black.
Self-fusing Tape for Auto
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Price: $16.71 Price: $5.95 Price: $4.99 Price: $7.99
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In our experience, glow plug problems typically are caused, at least in part, by a failure in this harness. OEM part number 1807648C94.  This is the original style glow plug harness for the 7.3L International engine as used in International trucks. This harness should fit early trucks that have the glow plug relay mounted on the rear of the intake manifold. THIS WILL NOT FIT A Ford truck with an International engine.  Made in the USA.  

Because there have been some cases where this does not fit, the best thing to do is to remove your harness, take a good picture of it and e-mail it to us before you purchase it, so we can be 100% certain that it is exact. 

The harness is built using the most common configuration. We have provided a detailed top of engine photograph so that you can compare it to your specific engine.


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Glow Plug Wiring Harness for 7.3L IDI International trucks
Model(s): 6.9L/7.3L
This roll is 1 inch wide and 12 feet long. Stretch, Wrap and Rescue yourself.   Stretch it and it permanently bonds to itself.
Tensile strength is 950 PSI.   Works in temperatures from -65 to  500 degrees fahrenheit. Electric insulation 8,000 volts. Waterproof and airtight. Made in USA.
Can be used on fuel lines, radiator cooling hoses, vacuum compressed air lines,  and hydraulic lines. Resistant to fuel, oil and hydraulic fluid, heat and cold.

Four wheeler magazine says, \"This stuff is like duct tape on steroids!\"

The only silicone tape used by the US Army vehicle & tank battle damage assessment kit.
Rescue Tape - Silicone - Stretch, Wrap and Rescue Yourself
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
This is a 14\" Harness Assembly for
3/8\" stud-type battery. It includes 4 hex serrated flange nuts
and 1 charging post.
Battery Cable Harness 14\"
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Center opening dual air intake with snap hardware included.
WinterFront Radiator cover Dual Air Intake
Model(s): 6.9L/7.3L, 9.0L, DT/DTA360, DT/DTA466, DT408/DT...
Price: $149.95 Price: $9.95 Price: $24.70 Price: $98.65
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