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Old 05-17-2007, 04:08 PM   #1
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Default A little 'short'?

I have an F-150 supercrew 5.4L Triton with just over 60,000 miles on it. Yesterday after a short drive with several normal restarts I got home and shut off the engine. Just after I shut it off, I thought I remembered hearing a buzzing sound. I tried to restart it but it won't start. The symptoms are as follows:
The battery seems fine and checked at 12.99 volts with no signs of corrosion anywhere. When I open the door I get a clicking (one second intervals) coming from behind the interior relay box. When the relay is clicking and I turn on the reading light it blinks along with the relay. When I turn the key to Acc everything that should work is ok (lights, radio and windows). When I turn the key to On (one click before start) all the gauges go to max. This includes the speedometer and tach - everything. After a couple of seconds they return to zero then a second later the battery and fuel gauge register correctly. Attempting to start the engine only results in a faint click under the hood (it sounds like a relay not the selenoid).
When I jump it with our Jeep it actually started and ran normally as I drove it for 25 minutes. I checked the voltage at the battery while it was running and it was 14.5. When I turned it off and back to the On position - again with the gauges and when I tried to start it, it clunked fairly loudly (more than a relay) under the middle of the dash (not the relay area) several times and did not engage the starter.
I did have the windshield replaced last summer and it went all the way through the rainy winter season without a problem. I did notice the gauges max out once before, but it started and ran fine. I also just had the speed control recall applied a couple of weeks ago.
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Old 05-17-2007, 05:33 PM   #2
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Check the ground. Check it at the battery and where it grounds to the block. Also check any small grounds that come off of it. Since you didn't give a year I can't look up any TSBs on it. Or any wiring diagrams. Good description other than that though. WTG on checking the battery and charging system.
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Old 05-17-2007, 06:20 PM   #3
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It's a 2001 year. I got the 6 year 100,000 warranty and it ran out 2 months ago. Darnit. Why do you think it's the charging system?
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Old 05-17-2007, 09:11 PM   #4
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Quote:
Originally Posted by motherlodefordguy View Post
It's a 2001 year. I got the 6 year 100,000 warranty and it ran out 2 months ago. Darnit. Why do you think it's the charging system?
Damn on the warranty. I don't think charging system. I think its a bad ground. Check them close. Clean them if necessary. Try running a new cable if in doubt.
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