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Old Jul 17, 2024 | 06:27 PM
  #1  
harleymc31's Avatar
harleymc31
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Electrical Issues

1995 F-250 7.3L with 385k miles. My wife was driving the rig this weekend while I was out of town, and experienced a range of issues I'm having trouble diagnosing.
At first the battery was low, so a neighbor hooked up jumper cables and it took 30 minutes before it would start. As she was driving, she noticed the speedometer wasn't working, as well as the other dials/displays. She was driving secondary streets and never got up over 40mph, but the truck was shifting at irregular RPM's and the shifts felt rough. After maybe 5 minutes of driving the engine quit and she pulled to the side of the road, then had it towed back to our house. At present if I try to start it, there isn't enough battery to even light the dash. Maybe a battery issue, but they're only a year old or so. Any ideas where to start?
 
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Old Jul 17, 2024 | 06:55 PM
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I would start by checking the alternator, then check the GP relay to see if it didn't get stuck in the on position
 
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Old Jul 17, 2024 | 06:56 PM
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Lots of threads here on batteries, grounds and replacing clapped out battery cabling. Thats where I would start.
 
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Old Jul 17, 2024 | 09:48 PM
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30 year old truck with 400k, everything is suspect



 
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Old Jul 18, 2024 | 08:55 AM
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https://www.ford-trucks.com/forums/1...ou-cranky.html

go through this hit list
 
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Old Sep 18, 2024 | 05:41 PM
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Originally Posted by harleymc31
1995 F-250 7.3L with 385k miles. My wife was driving the rig this weekend while I was out of town, and experienced a range of issues I'm having trouble diagnosing.
At first the battery was low, so a neighbor hooked up jumper cables and it took 30 minutes before it would start. As she was driving, she noticed the speedometer wasn't working, as well as the other dials/displays. She was driving secondary streets and never got up over 40mph, but the truck was shifting at irregular RPM's and the shifts felt rough. After maybe 5 minutes of driving the engine quit and she pulled to the side of the road, then had it towed back to our house. At present if I try to start it, there isn't enough battery to even light the dash. Maybe a battery issue, but they're only a year old or so. Any ideas where to start?
check fuses I had a 92 f150 and I blew a fuse and it basically threw its self into limp mode and shifted rough
 
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