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Discussion Starter · #1 ·
I have looked through several threads before posting to determine I might need a glow plug relay. Well I bought one and still no starting, bought another today and still nothing. The glow plugs will heat up if I jump the posts on the relay with a screwdriver. I actually got this 2000 F350 with 142k miles three days ago on trade for a 1999.5 Silverado 1500 so I don't know much of the history on it. I have tested the relay and when the key is powered on I get 12.94 to the power post and two small post. Still, with both NEW relays, I get nothing to the glow plug out post. I live in Raleigh, NC so the weather is on the cold side and the truck will not start without these.

I would appreciate any advice you can give me because this is my first diesel truck.
 

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Discussion Starter · #3 ·
Check the 4 plugs on valve covers, 2 two on each side to see if one or more are burn`t. this is common thing, not so much on superdutys. if not burn`t use a test light on the 2 outside pins on each plug and check the glowplugs. hook testlight to pos side of battery and test plug, light on plug is functional. hope this helps. lol
Thanks for the reply. Two of the plugs didn't show up on my multi-meter. But when I jump the relay with a screwdriver they will still heat up. Would having two bad plugs cause the relay to not send a signal?
 

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Discussion Starter · #4 ·
Well I checked farther down the line at the 42 point connector this morning on pin # 13 and had no power there. Hopefully this would be a short between the wire going to the pcm and not a problem with the pcm itself. Has anyone read or experienced similar problems?
 

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Discussion Starter · #7 ·
Today I installed 8 new ZD11's, a manual relay switch, and two new batteries. Still not starting. I have checked all the fuses with my multi-meter. I am really not sure what else to do as I don't really understand how the diesel ignition system works. While cranking the engine spins to about 2-300 rpms. Any help would be much appreciated.
 

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Discussion Starter · #9 ·
Thanks for all your help! I tried everything and all was fine. I remembered the previous owner mentioning they installed a new transmission so I checked the neutral safety switch. It was close enough to alignment to allow for cranking, but it wasn't allowing the truck to start. After aligning it properly the truck fired right up. I'm still glad to have changed the glow plugs anyways.
 
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