Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 01-26-2013, 08:53 PM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
Unhappy 1978 electrical problem, will not start

Hello,

I just purchased a 1978 F250 Ranger Lariat, AT, A/C, Cruise, Tilt, 460.
It has a few problems. I just drove it a couple miles to my buddies place, and now it will not even engage the starter.

The lights work, but do not dim when i turn the key. I tried to jump it, but not even a click from the solenoid. I checked the connections, they are all good.

Now my wife is giving me a really hard time about the truck I bought that stranded me on its first trip from the house.

I would greatly appreciate any ideas.

__________________
I'm the lucky one
My wife married an idiot.
Reply With Quote
  #2  
Old 01-26-2013, 09:42 PM
Redtires019 Redtires019 is offline
Junior User
 
Join Date: Jul 2007
Posts: 75
Redtires019 is starting off with a positive reputation.
Take the wire of the "S" post on the starter relay and put a test light on it. If it is not getting power then it is somewhere in the ignition switch or wires. If it is getting power then the relay may be bad. Start there
Reply With Quote
  #3  
Old 01-26-2013, 10:02 PM
montana_highboy montana_highboy is offline
Post Fiend
 
Join Date: Apr 2008
Location: Big Sky Country
Posts: 8,263
montana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud ofmontana_highboy has much to be proud of
Don't rule out a faulty NSS (neutral safety switch) try "jiggling" around the shifter while starting the truck...

Or better yet just temporarily bypass the NSS (after you rule out the solenoid and ignition switch).
Reply With Quote
  #4  
Old 01-27-2013, 09:48 AM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,386
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
Agreed with all the advice above.
Reply With Quote
  #5  
Old 01-27-2013, 11:09 AM
Notjoe Notjoe is offline
New User
 
Join Date: Jan 2013
Location: Washington
Posts: 13
Notjoe is starting off with a positive reputation.
Try tapping on the starter and solenoid with the key turned to start just to see maybe if that is seizing up
Reply With Quote
  #6  
Old 01-27-2013, 11:33 AM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
I ran a wire from pos battery terminal to srarter post on solenoid with key turned and it did turn over. So does that mean a bad solenoid?
Reply With Quote
  #7  
Old 01-27-2013, 12:34 PM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,386
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
Quote:
Originally Posted by tw View Post
I ran a wire from pos battery terminal to srarter post on solenoid with key turned and it did turn over. So does that mean a bad solenoid?
Aside from that being very dangerous (heavy inductive load that could spark near a battery), no, it does not tell you if you have a bad solenoid yet.

Either the solenoid is bad, or it's not getting a trigger signal. You need to check for power getting to the 'S' post first as Redtires019 describes above. Why ask for advice if you're just going to do your own thing anyway?
Reply With Quote
  #8  
Old 01-27-2013, 12:40 PM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
I did all of that yesterday before I asked. I just wanted to put out all of the info I had. I have not been able to check the truck since yesterday. It is still at my friends house.
Reply With Quote
  #9  
Old 01-27-2013, 12:41 PM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,386
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
Since it sounds like you have done some other diagnosis that was not listed in your original post, please list out all the things you have checked.

You're saying you have verified that 12 volts is getting to the 'S' post of the solenoid with the key in START?
Reply With Quote
  #10  
Old 01-27-2013, 02:03 PM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
Yesterday I ran a jumper to the starter just to make sure it wasn't stuck. I have not yet done any other diagnosis since it is parked at my friend's house and i didnt have my tools. I will be heading over there soon and use the advice i have been given so far and will report back. Thank you all
__________________
I'm the lucky one
My wife married an idiot.
Reply With Quote
  #11  
Old 01-27-2013, 03:09 PM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
The s pole on the solenoid does not get power, with key on or start position
Reply With Quote
  #12  
Old 01-27-2013, 04:03 PM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,386
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
Quote:
Originally Posted by tw View Post
The s pole on the solenoid does not get power, with key on or start position
That's your problem then. This has nothing to do with the starter solenoid. The problem is with the ignition switch, or the wiring in between. With the key in START, the RED with BLUE stripe wire that leaves the ignition switch and goes to the 'S' post of the solenoid should have power.

Applying power to the 'S' post of the solenoid is what actually makes it close. The solenoid will never engage without this.
Reply With Quote
  #13  
Old 01-27-2013, 05:52 PM
tw's Avatar
tw tw is offline
Elder User
 
Join Date: Aug 2000
Location: Ft. Bragg, NC
Posts: 655
tw is starting off with a positive reputation.
Thank you all for your help, I had to hotwire it to get it home and out of his driveway. I checked out the wiring behind the ignition switch and it is a mess. The previous owner had spliced in multiple places. I really appreciate all of the input. I will pick up a new switch and do some wire repairs later this week or weekend.
__________________
I'm the lucky one
My wife married an idiot.
Reply With Quote
  #14  
Old 01-27-2013, 08:37 PM
fmc400's Avatar
fmc400 fmc400 is offline
MSEE
 
Join Date: Apr 2004
Location: Austin, TX
Posts: 10,386
fmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud offmc400 has much to be proud of
No problem, best of luck.
Reply With Quote
Old 01-27-2013, 08:37 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1973 - 1979 F-100 & Larger F-Series Trucks

Tags
electrical, relay, solenoid, starter

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rad Hoses for Super Cooling Rad Negrey 1973 - 1979 F-100 & Larger F-Series Trucks 9 08-08-2014 12:03 AM
1978 f250 heating problems Kurtlin Mckibbin 1973 - 1979 F-100 & Larger F-Series Trucks 11 03-10-2014 10:36 PM
The University Budget Build Thread Aaron-71 Manitoba / Saskatchewan Chapter 121 03-09-2014 11:19 PM
The College/University Budget Build Thread Aaron-71 1973 - 1979 F-100 & Larger F-Series Trucks 126 03-09-2014 04:16 PM
Exhaust Manifold Gasket Replacement - 351M sraab928 1973 - 1979 F-100 & Larger F-Series Trucks 21 12-08-2013 08:31 AM



All times are GMT -5. The time now is 06:59 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup