D24T.com  

Go Back   D24T.com > Technical Discussion Area > Help! My car died!
Register FAQ Community Calendar Today's Posts Search

Reply
 
Thread Tools Display Modes
  #1  
Old 10-02-2020, 12:29 PM
DieselScout DieselScout is offline
Senior Member
 
Join Date: Aug 2014
Location: Upstate, NY
Vehicle: 1982 245-GL D6, 1982 244-GL D6
Posts: 177
Default Blowing 12V Solenoid Fuse

Replaced the Injection Pump on my '82 245.
Got the car timed and running.
A few hours later, it started blowing the 16a fuse, 3rd from the bottom.

If I disconnect the 12v Solenoid cable on the Injection Pump, the fuse works.

Any idea what may cause the 12v solenoid to be shorting the system?

Currently can't drive car, because it blows the fuse the moment I switch the key to ignition.
Reply With Quote
  #2  
Old 10-02-2020, 03:58 PM
Goteborg Vapenfabrik Goteborg Vapenfabrik is offline
Supporting Member
 
Join Date: Nov 2011
Location: Oglethorpe's Colony
Vehicle: 1985 740 Wagon
Posts: 156
Default

Its probably time for a new engine wiring harness.
Reply With Quote
  #3  
Old 10-02-2020, 06:16 PM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,388
Default

As a test for that (bad wiring) you can disconnect the original wire from both ends, and run a fresh temporary wire from the fused end to the solenoid. If that works, just make it more permanent. That at least buys you more time to assess whether the rest of the wiring is in need of replacement (probably) as Goteborg Vapenfabrik suggests.

See this post:
1984 rotting cables
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
  #4  
Old 10-04-2020, 06:30 AM
DieselScout DieselScout is offline
Senior Member
 
Join Date: Aug 2014
Location: Upstate, NY
Vehicle: 1982 245-GL D6, 1982 244-GL D6
Posts: 177
Default

My wire harness was cracked with lots of exposed wires, so i replaced it with a new one I had on the shelf; the results were the same.

The resistance of the solenoid reads 0.9, where as the solenoid on my other D24 reads 7.7.

I suspect the solenoid may have become compromised during the installation, so I ordered a new one; which will hopefully this week.
Reply With Quote
  #5  
Old 10-04-2020, 10:08 AM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,388
Default

Good method. And you have solved many future electrical problems by changing out the bad harness.

You CAN run the car with a bad solenoid by removing the plunger and reinstalling the solenoid without it, leaving the wire disconnected. Shut the engine off by stalling it in gear.
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
  #6  
Old 10-06-2020, 05:06 PM
DieselScout DieselScout is offline
Senior Member
 
Join Date: Aug 2014
Location: Upstate, NY
Vehicle: 1982 245-GL D6, 1982 244-GL D6
Posts: 177
Default

Installed the new Bosch Thermostat and the car started right-up without blowing any fuses. :-)
Reply With Quote
  #7  
Old 10-06-2020, 06:54 PM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,388
Default

That is surprising and doesn't make any sense but we'll take it as a win!
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
  #8  
Old 10-11-2020, 07:51 AM
v8volvo v8volvo is offline
Supporting Member
 
Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,655
Default

Quote:
Originally Posted by DieselScout View Post
Installed the new Bosch Thermostat and the car started right-up without blowing any fuses. :-)
You might have meant "solenoid" rather than "thermostat"? Just checking in case any need for correction to avoid confusion for anyone who finds this thread in the future.

Nicely done, good outcome. I think that is the first time I have ever heard of one of those solenoids failing shorted, interesting. Now we know it can happen.
__________________
86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
Reply With Quote
  #9  
Old 10-12-2020, 04:10 AM
DieselScout DieselScout is offline
Senior Member
 
Join Date: Aug 2014
Location: Upstate, NY
Vehicle: 1982 245-GL D6, 1982 244-GL D6
Posts: 177
Default

Yes, I did mean "Solenoid" instead of "thermostat," lol.
Must've been right after I replied to the other thermostat thread.

I didn't know those could fail either, but just as a precaution, I am keeping a spare in my glove box with a wrench in case it ever dies while I'm driving.
Reply With Quote
Reply

Tags
d24t, fuse, short, solenoid


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 02:54 PM.


Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2024, vBulletin Solutions, Inc.