Archived Starter won't engage

[Balzac]

I was working on my TPS and smoke started coming from wires with engine running. I turned
off ign. switch and nothing happened, then it stopped running and the smoke stopped. The fuel shutoff solenoid was the culprit. I ordered one from Genos, have installed it and replaced the fuseable link . Now when all is connected the fuel solenoid is activated when key is off and fuseable link wire is connected to battery. And now the starter does not work. Any suggestions welcome.

 

[BigPapa]

Hello Balzac,



From what you stated above, I am going to say that the issue was not the Fuel Shut-off Solenoid but that your starter hung up. This is a fairly common issue and there are several threads here about it, one is active right now here:



https://www.turbodieselregister.com/forums/showthread.php?238716-Boy-this-scared-me-today!



When the starter hangs up it burns up the FSO solenoid. I'd pull your starter and check it out.

 

[Balzac]

Thanks for the replys, Have been working on this problem all morning and discovered the fuel shutoff relay is activated when the battery's are connected, this of course lifts the solonoid constantly,(drained the battery overnight with the solonoid disconnected).
I think the relay should not be energized when key is off. ?

 

[Balzac]

Further investigation shows me the small terminal on the starter is hot with key off. I did replace the starter a couple of years ago with a brand new one If I plug in the connector below the underhood fuse block back together the fuel solonoid lifts ( that plug joins the brown wire from the small terminal on the starter and the hot red wire from battery to??? ) The brown wire from the starter small terminal should energize the starter solonoid I think. I think I will pull the starter tomorrow and check it out.

 

[Missouri Mule]

Balzac , seems like your starter relay in the PDC(under hood near driver's side battery )is acting up. Maybe the contacts in the relay were welded together during your smoke out incident.



The starter relay when key is in start position sends power to the relay activating it, power is supplied to the relay from the battery thru a fuse in the pdc (don't rember which one have to look it up).



The starter relay allows power to go to the starter solenoid, there is a split in the wire where power goes to the Fuel shutoff solenoid relay activating it. Of course you already know that the fusible link wire supplies the power to the fso relay that is tranfered to the FSO.



Switch the starter relay with another one and see if that solves your problem. If it does but new relay (Radio Shack has relays that will work but they are rated 30 amps not 40 amps. I am using one for my starter realy. )

 

[Balzac]

Thanks Bill, I did try switching the relay, no difference.

 

[HHhuntitall]

Sounds like a wire is melted into another one or the starter contacts are fused..... odd. Pull the starter and check it, then look for wires melted together, such as the brown starter solenoid wire melted into the battery cable... ... Perhaps the red wire from the fuel solenoid melted to the white wire.....

 

[Balzac]

Thanks, That was my next step. Taking the day off, will do that tomorrow!

 

[Balzac]

It was the starter solenoid. Thanks all!