5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

'92 Electrical Problem

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Old Aug 27, 2011 | 02:34 PM
  #1  
reo4ua's Avatar
reo4ua
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From: LA
Default '92 Electrical Problem

-turn ignition switch to engage starter and there's a very audible "click" then all power to the cabin goes out and doesn't return for about a minute or so. Starter doesn't engage.

-12.5v reading via multimeter on battery

-shorting out the posts on the solenoid located on the drivers side fender well produces the same exact result

-reading 12+ volts on same solenoid

-good continuity on small ground wire that runs between above solenoid and starter

-pulled starter and bench tested good

-good continuity on ground between battery and fender well

-makes sense to me that something is throwing a breaker due to the power outage then ultimate automatic reset mentioned above.



Where do I go next????
Old Aug 27, 2011 | 03:40 PM
  #2  
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1987gt40ttop
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does the car have an alarm system? is manual or automatic? when did this start? have you done anything to the car recently?
Old Aug 27, 2011 | 04:18 PM
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reo4ua
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Originally Posted by 1987gt40ttop
does the car have an alarm system? is manual or automatic? when did this start? have you done anything to the car recently?
-manual

-few days ago

-replaced thermostat

-pressure washed underside of car



-strange thing is now that i've re-mounted the starter after the bench test, I still get the clicking noise (sounds like its coming from the relay on the fender well) but I don't lose power inside the cabin. Also where before I removed the starter and tested all the wires I could arc the +/- posts on the relay and get the "click", now nothing happens when i short them out.
Old Aug 27, 2011 | 04:38 PM
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I had a battery in my ranger that had a post that was almost broke, did the same thing u are talking about. If the starter tested fine, but shorting the solenoid doesnt start it, try a putting in a different battery. I used jumper cables hooked to a good battery and it wouldnt start because of the post on my battery being almost shot inside the battery. Changed the battery and fired up. Worth a shot
Old Aug 27, 2011 | 05:30 PM
  #5  
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AdderMk2
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From: Lil' Rhody
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sounds alot like the guy above me has you on the right track. Check your battery terminals and connections, make sure they are all tight,
Old Aug 27, 2011 | 06:40 PM
  #6  
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reo4ua
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Originally Posted by 9fo5oh
I had a battery in my ranger that had a post that was almost broke, did the same thing u are talking about. If the starter tested fine, but shorting the solenoid doesnt start it, try a putting in a different battery. I used jumper cables hooked to a good battery and it wouldnt start because of the post on my battery being almost shot inside the battery. Changed the battery and fired up. Worth a shot

New battery and all connections are clean and tight.
Old Aug 27, 2011 | 07:00 PM
  #7  
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TrimDrip
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you said the starter was tested. What exactly is a bench test? (idk)

Anyways, a clicking starter will still spin pretty decent when lying on the ground. (like a hundred rpm a minute or so) Nothing like it should though.

idk about the lights thing though. I guess I would just go through and make sure all cables are not corroded bad and re-check grounds.

Last edited by TrimDrip; Aug 27, 2011 at 07:03 PM.
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