I made a harness a few months ago with 10 gauge wiring and those bullet connectors. I wasnt too happy with the bullet connectors they stayed on but not very tight and i've had a couple vibrate loose. So i found the 6.0L power stroke harnesses are readily available and have nice connectors and are pre made for under $50. The only thing you need to do is solder/crimp the 4 wires to a single 10 gauge and route it to your glow plug controller. The 6.0s use ZD13s which have the same .157" bullet at the top. Maybe this has already been posted but i figured i'd share it since i think its a great harness that fits with no modification. The one front connector is slightly pulled on but i think once the engine warms up the plastic wrapping will stretch a little and let it sit straight.

 

Cool find. Make sure you put the anti vibration clamps back on your injector lines.

 

Thank you, i will. I am in the middle of a water to air IC install, and did bull moose and misters install. I just havent gotten around to putting everything back together yet.

 

That's a sweet find, thanks for sharing!

 

I'm putting a 7.3 in my 86 f350. I have the complete harness from an 86 f250 idi that I installed in it. How much of a PITA is it going to be if I was to get this harness and wire it to the 86 harness??

Thanks Bob

 

This harness will only fit the bullet style glow plugs. You just cut the 4 wire connector and crimp them together to a single 10 gauge wire, then connect two tow 10 gauge wires where the factory glow plug relay connects. The glow plug harness should be separate from the engine harness. I think maybe the oil pressure sensor wire runs inside of the loom but thats it

 

So all 4 of the colored wires on the new harness would become 1 wire? You have any more pics? The harness plug on the truck side has 8 wires in it. I have a 94 f250 idi Na that I could reference. I do have the engine side harness as well for the gps which is the blade connectors.

 

Can you switch an 86 to the later ZD9 bullet glow plugs to be able to use this harness?

 

I don't see why they wouldn't work. Only difference I could see would be the connection, blade vs. bullet.

 

I ended up running 4 total 10 gauge wires because it just worked out better with the connectors I had. So I have 4 ring terminals on my glow plug controller stud. All the wire in the harness goes to is each glow plug. 4 wires, 4 glow plugs. That's it. Cut the connector off and extend and connect the wiring however you'd like to your controller. There is no fancy resistor or specific wire thats needs to go anywhere on the harness. It's just a hot wire grounding out at the glow plug

 

Yes. Unless they have some different voltage controller but I'm pretty sure the only difference was spade vs bullet connection

 

Spade GP's are 12 volt, bullet GP's are 6 volt. Don't try to use bullet GP's with the 6.9 controller. You either need to convert to the 7.3 controller or at the minimum find a 7.3 "Z" strap to reduce the voltage and wire them to a manual push button. Kind of a pain to convert, but well worth it. The 6.9 controllers are total junk, and when they fail it is often in the "on" position which burns up the GP's. Can also fry the wiring and swell a GP tip so it won't come out of the head.

 

Ok cool! The truck is is an 86 and the engine is a 7.3 in it which has the correct controller and GPs. Thanks!

 

Both systems are 12 volts running to 6 volt plugs. the bent z strap doesn't drop the voltage, I've checked that with a voltmeter on my 89, hell my controller burned up, replaced the relay, ditched the bent piece of metal, wired a momentary toggle with 8 new ZD9s, been in there for over a year, 0 issues, no burnt plugs.

 

Thanks on the Link to the 6.0L GP wire harness! I've broken a couple of those bullet connects on my 87 and have not come across anything to replace them. I have soldered the two pieces together... just a little tricky getting a hot iron down close into cavity areas. I came across the same new replacement harnesses for the Ford 6.0 on ebay, both sides at only $19.95, for that cost I will certainly give them a try! .... PS. It seems from pic that the wiring is somewhat smaller guage? Not sure... It states above that they switched from a 12 volt system to a 6 volt system on the 7.3. I have on a 1987 the newer GP system as used on the 7.3 in 88. Are my GP on 6 volts or 12 volts being that its a 6.9??