Looking for on-line diagnostics and schematic on glow plug system for 1996 F-250 Powerstroke Diesel.

 

bz
sorry. dont know anyplace online to get that
but i work on the system all the time. maybe if you give me your prblem i can point you in the right direction. will help if i can.

scott

 

Scott
Thanks for the help.
I just bought the truck 6 months ago and on cold mornings it wont start.
How do I test the system to see if its relays, glow plugs, or connections.
The battery guage shows discharge when wait to start light is on, but goes to normal as soon as it starts.
My wifes truck discharges much longer after start.
any help will be appreciated.
thanks bz

 

[font size="1" color="#FF0000"]LAST EDITED ON 08-Nov-00 AT 06:54 PM (EST)[/font][p]bz
Sorry i took so long. i lost my message board access because of some stupid remarks i made.
first check the 4 plugs going into your valve cover gaskets. the glowplug circuits are at the far left and far right of the connector. 3 injector wires in the middle. make sure they are not burnt. you can test the glow plugs by hooking
a test light to the positive term. on your battery
and carefully touching the end pins in each plug
AT THE VALVE COVER SIDE. MALE PINS. if the light
comes on the glow plug should be ok. On the relay
you should have a constant hot and three other posts. the other large post with 2 wires on it
should send 12v to the glow plugs when the key is on. 12v to the end of the valve cover connector.
test this far and let me know. If you want to give your e-mail adress out i can get you a wiring
scematic of the system and trouble shooting process.
scott

 

 

I would like to pick your brain for afew answers if possible about my 95 F350 5-speed 2-wheel drive truck. I'm having a cold start problem and was thinking that it was the glow plugs. I went ahead and started to take them out of the engine and checked them and the wiring circuit and checked out OK! That is when I
found that the relay wasn't working. The crappy book that I have which is a Chilton's said that the glow plug system stays on from 2-10 seconds until the engine starts, and then cycles for up to 40-90 seconds to clear the excess fuel. So I replaced the relay and and then the relay stayed on all the time, which meant that the glow plugs were on all the time. So I unplugged the wire from the
relay and was trying to find out what times out these glow plugs!
I have been reading all these messages on this site, and it seems that the relay is the culprit. But no one mentions about the timing of the glow plug system! I've worked on Mercedes for 20 years and there are sensors that switch the glow plugs off after start-up. I see that some people put a momentary switch on the dash, but I don't like rigging something without knowing that it is possible to fix it right. Of course the repair books just suck when it comes to looking at illustrations. I you have any idea of if there is something in the system that I can check or replace (timer,switch,relay,or main computer) to get the system working right would be greatly appreciated.