Electrical issues on a 2000 6.8v10
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
Electrical issues on a 2000 6.8v10
So I've made some comments about this excursion I'm trying to buy... Basically the deal I've got worked out is that I'll buy parts and the seller will help install them until we either get it going well or I get sick of buying parts.
anyway, a fuel pump and neutral safety switch later, we have it running, but the way we got it started was to hold the key on start and use a screwdriver to jump the solenoid on the fender. Obviously this isn't a long term solution, but it got the truck running.
Starter works, solenoid works, fuses are all good. We just have nothing when you turn the key. What should our next diagnostic step?
we also have a charging issue - the battery reads 11.6v when the engine is running, and we pulled a "keep alive power voltage too low" error code. Not sure what that means. Anyone hat this before?
anyway, a fuel pump and neutral safety switch later, we have it running, but the way we got it started was to hold the key on start and use a screwdriver to jump the solenoid on the fender. Obviously this isn't a long term solution, but it got the truck running.
Starter works, solenoid works, fuses are all good. We just have nothing when you turn the key. What should our next diagnostic step?
we also have a charging issue - the battery reads 11.6v when the engine is running, and we pulled a "keep alive power voltage too low" error code. Not sure what that means. Anyone hat this before?
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
See this thread, identical "no crank" issue: https://www.ford-trucks.com/forums/1...-runs-but.html
Your alternator isn't working, troubleshoot separately.
Your alternator isn't working, troubleshoot separately.
Thread Starter
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
it was the starter solenoid relay on the PS fender by the battery. Looks like it's incorrectly called a solenoid all the time.
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
Update: turns out the issue was an incomplete install of the transmission switch. The shaft part was not on all the way, and tightening the bolts to seat the switch bowed the switch enough to break contact internally. Forced the switch the rest of the way on, and started with the key just now.
special thanks to whoever posted the wiring diagram. Can't find who it was on mobile at three moment, but it really helped.
special thanks to whoever posted the wiring diagram. Can't find who it was on mobile at three moment, but it really helped.
Thread Starter
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
See this thread, identical "no crank" issue: https://www.ford-trucks.com/forums/1...-runs-but.html
Your alternator isn't working, troubleshoot separately.
Your alternator isn't working, troubleshoot separately.
Thread Starter
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
Update: I'm at a loss.
- Replaced the alternator
- Replaced the battery
- Replaced the main block ground strap
- Cleaned corroded terminals on battery, starter, starter relay, and all wires in between.
- Replaced the main battery positive harness. (the one that feeds the starter and starter relay)
- Added a jumper from the charge terminal to the starter relay on the fender to duplicate the positive charge cable.
- The fusible links checked good from the alternator at the starter relay.
- The gauge cluster seems to be working - all gauges function and all warning lights come on in the startup check.
- There are no other obvious electrical faults with the vehicle.
- All fuses have continuity measured by voltmeter.
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Senior User
Joined: Apr 2009
Posts: 210
Likes: 0
Wow, I may actually be able to be helpful for once. I had a similar issue and I replaced the whole pos battery cable thing for $120 or so. Mine was clearly eroded and bad but it fixed the issue.
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Thread Starter
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
The one that goes battery to starter relay and battery to starter? did that one already I'll add it to the list.
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Laughing Gas
Joined: Dec 2017
Posts: 879
Likes: 40
From: Greensburg, IN
I did find a diagram for the charging circuit, and it looks like there might be some damage inside the CJB.
The seller and I are parting ways on this though, so I guess it is a moot point. Too bad we don't have an answer to leave here for the next guy.
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