1989 f250 C-6 glowplug problem

[dyoung14]

OK i turn the switch on, the light comes on stays on the full legth of time, but wont crank, so i get out and crawl under the hood and short the relay out and it cranks up pretty easy, so i know i have working glow plugs cause it actually cranks, so whats my problem why wont it work off the switch?

 

[93f250idi]

Maybe a fuse? My 93 had a blown fuse and for some odd reason the light would come on and wouldn't crank. I replaced the controller and all gps still nothing. Checked the fuses and the gp and tail lights were blown. May not be on the same fuse tho can't member

 

[dyoung14]

Maybe a fuse? My 93 had a blown fuse and for some odd reason the light would come on and wouldn't crank. I replaced the controller and all gps still nothing. Checked the fuses and the gp and tail lights were blown. May not be on the same fuse tho can't member

I remeber you saying you had some relays or something, do you still have them? and i will check fuses but i would like to have a spare relay, i use to have one before i converted my 86 to solid state glow plugs

 

[93f250idi]

Ya i still have the relay off the black truck. Make an offer on it. Not for sure if it worked because of the bad fuse.

 

[bghnkinf350]

Have you checked the neutal safety switch?

 

[OLDBULL8]

If you shorted it out at the starter relay on the fender and it cranked, then it's either the relay is bad or no power from the key switch. Power to the key is always hot from the battery thru a fusible link. Check for voltage at the starter relay with the key on trying to start. Neutral sw. also.

 

[dyoung14]

If you shorted it out at the starter relay on the fender and it cranked, then it's either the relay is bad or no power from the key switch. Power to the key is always hot from the battery thru a fusible link. Check for voltage at the starter relay with the key on trying to start. Neutral sw. also.

NO NO NO it will turn the engine over, but it will not heat the glow plugs is what im saying

 

[bghnkinf350]

Mine did the same thing - turns out the Neutral Safety Switch was bad. You can turn the key to on, but will not crank. You jump the starter solenoid and it fires up. The Neutral safety switch can cut the signal to the starter circuit.

 

[icanfixall]

Check the main engine harness plug.... they get corrosion in them and melt because of the heat. Its free to take a looksee....

 

[dyoung14]

Mine did the same thing - turns out the Neutral Safety Switch was bad. You can turn the key to on, but will not crank. You jump the starter solenoid and it fires up. The Neutral safety switch can cut the signal to the starter circuit.

For the second time! the starter engages and works perfect with the switch,

ITs a glow plug problem, hence the name of the title GLOW PLUG PROBLEM come on guys wake up too much to drink over the holidays?

 

[dyoung14]

Check the main engine harness plug.... they get corrosion in them and melt because of the heat. Its free to take a looksee....

I see that it has melted and the PO has spliced some wires were the glow plug wires melted out of it

 

[bghnkinf350]

Wow you get testy real quick.....I think it is time for you to leave! Nah, just screwin with you. Sorry for the confusion, just reading the other post, I thought it would start when you jumped it, but not by the switch.

Hell, I have not had enough to drink for the holidays! Maybe this Friday, I can make up for it!

 

[dennis]

I see that it has melted and the PO has spliced some wires were the glow plug wires melted out of it
__________________
~David~

I would look there first. it might be pretty obvious or you might need a multimeter to check the connections.

 

[dyoung14]

Wow you get testy real quick.....I think it is time for you to leave! Nah, just screwin with you. Sorry for the confusion, just reading the other post, I thought it would start when you jumped it, but not by the switch.

Hell, I have not had enough to drink for the holidays! Maybe this Friday, I can make up for it!

I didn't get any to drink but I'm hoping to make up for it on new years lol