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Old 04-26-2014, 04:11 PM
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Even my mechanic can't figure this out

Posting is in 911 because I have got to get to work tomorrow....

95, 7.3 PSD

the other day, went to work and the truck wouldn't turn off. I figure the ignition key cylinder has gone out, so I pulled the 30 amp fuse in the distribution box powering the alternator and forced it to shut down. Replaced the key cylinder this morning, batteries are dead.

Hook a trickle charger up to the batteries, and the fuse distribution box starts clicking along with the starter relay. Dash lights and odometer turn on and off at random. So I pulled the 30 amp fuse again to allow the batteries to charge up. Once the batteries were charged I hooked everything back up and pop in the fuse. Lights on dash are on, no key in the ignition. Turn the key and it cranks, but doesn't turn over. Pull the key out and the distribution box is going crazy again, lights on the dash stay on.
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Old 04-26-2014, 04:31 PM
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Quote:
Originally Posted by yogifink View Post
it cranks, but doesn't turn over
Same things. I think you mean it will crank/turn over, but not actually start and run.

But anyway, with all the buzzing, I would be making sure both batteries load test good, and then checking ALL the connections. At the battery, frame/engine ground, check the cables for corrosion.
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Old 04-26-2014, 05:06 PM
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Just replaced the glow plug relay. Same issue. As soon as I hook the positive line up, I get the same clicking sound from somewhere near the relay.

Batteries are holding charge, just took them to be tested.
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Old 04-26-2014, 05:16 PM
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Holding charge is not the issue. LOAD test. A battery can show a fine surface charge, but can't handle a load.
What is their CCAs?
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Old 04-26-2014, 05:24 PM
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okay, I will load test them in the morning.

But why is everything on (engine light, odometer, abs light) when the truck is off and the key is out?
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Old 04-26-2014, 05:25 PM
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Low voltage does funny things.
Has it been raining lately?
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Old 04-26-2014, 05:49 PM
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Check your ignition switch.

Also check the solenoid on the inside passenger side fender.
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Old 04-26-2014, 06:11 PM
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Quote:
Originally Posted by jesilvas View Post
Low voltage does funny things.
Has it been raining lately?
OP, jesilvas isn't beening funny by asking about the weather. It is a known issue for the windshield to leak which usually pours right on top of the pcm. This can cause all kinds of problems.

Low batt voltage can also make for some weird scenarios.

Something internal in the pcm might not be properly shutting down when the key is off.
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Old 04-26-2014, 06:27 PM
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could you please explain the solenoid. whats it look like, where is it?
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Old 04-26-2014, 06:29 PM
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it has been raining...

the solenoid would make more sense though. I have a coolant leak in the same area...
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