starter won't engage when gp's connected

[richter1978]

Just finished installing glow plugs, timing chain, water pump, injectors and injector pump. First primed to fuel filter with glow plugs and pink wire disconnected. Then primed injectors with pink wire attached and glow plugs disconnected. Next connected glow plugs waited for wait light, turned key and starter wouldn't engage it just clatters like dying battery! When I unclip glow plugs it cranks fine. I also noted a hot electrical smell. Any help would be appreciated.

 

[Barrman]

You have some wires hooked up wrong somewhere. Check out appendix F of the -20 and follow all the wires involved with starting and glowing to make sure they go to the proper place.

 

[richter1978]

Sorry, I forgot to mention '85 M1028. Thank you for the response Barrman. I took a look at the -20 everything looks good from what I can see. I need to add that the only wires/leads that were ever removed were the two greens and pink from pump and the 8 greens @ glow plugs all of these are back where they should be. I tried to start it again and the gp relay normally pops or clicks after the wait light goes out, this time it sounded more like an air-raid siren starting up.

 

[richter1978]

I had the battery leads removed also. Had both batteries charged at Advance Auto pryor to fuel priming.

 

[mistaken1]

It has been my observation that the glow plugs are not necessarily de-energized when the wait light goes out.

It could be something hooked up wrong or perhaps after priming with the starter and then the combined starter and GP load is too much for the batteries.

What are the battery voltages?

Did Advance Auto load test the batteries after charging?

 

[Blood_of_Tyrants]

Sounds like your glow plug controller card is bad and keeping the GP relay engaged. Bypass the card by installing a momentary ON switch to the GP relay.

 

[SGT Estum]

I don't know about the M1028, but for my M1009 the wiring diagram is not correct in the -20 manual. There's a wire it shows going to the wrong post on the GP relay. You search this forum for the corrected diagram... I know it's been posted several times.

 

[Warthog]

Did the parts house load test your batteries also?

How many times did you crank the engine during the bleeding process?

From you description the batteries are weak or you have a loose/dirty battery connection.

The "MISTAKE" in the Glowplug wiring diagram is the small orange wire. It is shown to be hooked up to the terminal with the RED hot wire. It MUST be hooked to the other terminal with the two large orange leads.

 

[richter1978]

Thanks for the help all. It was batteries, two new ones and she turned over just fine.

 

[TCUCV]

It sounds like everyone is loosing battery power everytime they prime their fuel filters. Wouldn't it be wise to prime filters, charge batteries and then try to start truck?

Luckily I haven't had to do this yet but by all the stories people are posting, it's not going to be fun