Hello all, please be patient with me as I have to relay all the info I get to someone in the field.

1990 E350 7.3
new battery, new starter
haven't seen the glow plug light in sometime, have been listening for the relay to click for start

now there is no click and of course the engine will not start

is there a way to set up for manually heating the plugs without being near a store to get little parts?

please help,
Denise

 

Anyone? Please!

 

the plugs have to have the power pulsed to them
they are 6 volt glow plugs so they heat quickly
only power them up for a few seconds at a time until they heat up
if you turn them on continuously they will burn out
anf if most of them are burnt out the controller will not turn on

 

also check the wiring loom going to the right fender apron
there are two large yellow wires that are known for
melting the connector due to the high current the plugs draw

 

Do you have a test light?

Look for the 2 large yellow wires put a test light on the controller where are connected see if theres power (constant hot) if not you lost the fuseable links by the battery.

 

Theres a glow plug thread at the top of this forum for the 7.3L style system. Give that a read over and it should get you some diagnostic steps that should get you rolling again.

 

also
plug in the truck so the block heater is on for like an hour and it may start without glow plugs....

 

The 6V glow plugs are on the 6.9 only 1983-86 only.




Best to remove/inspect all your glow plugs, you have the solid state glow plug system, witch is the best one, and if 2 or more plugs burn out, it will not work.



If all Plugs are good, check wiring, then controller.


But even if some plugs are burnt out, the controller should still click. If it doesn't click at all, it might be dead.




Heres how you setup manual glow plugs if you wish to go that way.


You'll just need a momentary push button, run a wire to the GP solenoid purple wire terminal, make sure to remove the purple wire from solenoid so the truck can’t control them, and then find a ignition on hot wire in the cab, connect that to the one side of the momentary switch and the wire you ran to the purple wire terminal, to the other side, bam, done.

 

all idi,s are 6 volt , the only difference between the early and late is the spade connector and the bullet connector
if you think the late idi glow plugs are 12 volt turn one on with constant power and watch it burn out

 

Some aftermarket plugs will burn out, Motorcrafts do not burn out no matter how long you keep them on. They are self regulated.



1983-86 Are 6V spade connector plugs, 1987-1994 are 12V bullet connector solid state system.

 

motorcraft plugs are not self regulating, if you leave power on to them for too long they will burn out.

 

You can "jump" the the 2 large posts on the GP relay with a screw driver or other metal object, taking care not to touch any other metal with what ever you are using to jump the posts. Hold the screw driver on the 2 posts for 10-12 seconds. Be careful the screw driver will get hot. This is of course assuming you are getting full 12 volts to the one terminal on the relay.

 

Some aftermarket plugs will burn out, Motorcrafts do not burn out no matter how long you keep them on. They are self regulated.



1983-86 Are 6V spade connector plugs, 1987-1994 are 12V bullet connector solid state system.
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i brought this post up at work , at the ford dealership , thanks for the laugh