2002 ford f350 7.3l will not crank.. HELP!! - Ford Powerstroke Diesel Forum
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Old 08-01-2010, 09:22 AM
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2002 ford f350 7.3l will not crank.. HELP!!

Well first off I thank you for reading this, and any input would be greatly appreciated. I just finished up a trip from ok. to tx. and back. I parked my truck went to bed, and when I returned to the truck the following morning it wouldnt turn over. I opened the fuse box, and the relays are clicking, but it wont crank. I checked the voltage on the batteries, and they are both 12.4. They were a little corroded, so I cleaned both of them, and still nothing. The air lights, blinkers, and everything else still works, but no crank click or anything. I left a power inverter plugged in to the auxillary cig lighter port. Could it be the starter? it has never given me any trouble in the past. Thank you for any and all advice on how I could troubleshoot this. I am mechanically challenged.
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Old 08-01-2010, 09:38 AM
Other vehicle is an F250
 

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Sorry to hear about your problem. Get a charger on those batteries for awhile. Make double sure that isn't your problem. How old are they? Just because they work your lights doesn't mean you have enough amps to turn over a diesel. Takes a lot.

If you can find someone with an AutoEnginuity scanner that would tell you a lot. Post on here in and ask if there is someone in your area that may have one and the willingness to come over and check it out for you. Lots of great folks on here.

Get those batteries charged real good and see what happens. You should have a point where the cables come together with a place to hook a charger to. You should be able to charge both at the same time. I always go for a low amp charge for a long time rather than a bunch real quick.. Just me.......

Oh and WELCOME TO THE ORG.!
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Old 08-01-2010, 09:39 AM
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That battery voltage you measured is borderline. If the batteries were fully charged and healthy then you should measure somewhere between 12.6-12.8 (and even higher shortly after charging). I would start by ensuring your batteries are healthy. Take them up to the autoparts store and have them tested. If they test well, throw them onto a battery charger. If that doesn't fix your problem, come on back and we'll keep going down the list.
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Old 08-01-2010, 09:41 AM
Other vehicle is an F250
 

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Well two of us agree!
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Old 08-01-2010, 10:03 AM
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that makes three! our trucks really need good batteries! i know you stated corrosion on the terminals, clean them well, replace if needed. get a good charge and go from there. checking the starter would be the next step i assume. good luck!!!!!
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Old 08-01-2010, 10:07 AM
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I put two trucks with jumper cables on it, and still nothing. no clicks or anything.. Where is the starter solenoid? I looked on the passenger side fender, but it isnt there. should I take the starter off and have it tested?
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Old 08-01-2010, 10:09 AM
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even weak batteries will crank. I would say it's your starter. If you can have someone hold the key over while you slid under the passenger side of the truck with a hammer tap on the starter. My guess is that it will start. Takes about 15 min tops to take the starter out.
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Old 08-01-2010, 10:14 AM
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My truck has done the same thing to me and it was the starter. Parked it at work in the morning, went to go home and nothing, no clicks, nada, replaced the starter and it's fixed. Make sure you check the relay on the pass-side fender, try to jump the two terminals and see if it will turn over.
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Old 08-01-2010, 10:15 AM
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I cant find that relay anywhere.. the only thing on the passenger side fender that is visible, has hoses coming off of it.. would it be anywhere else?
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Old 08-01-2010, 10:16 AM
Other vehicle is an F250
 

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let me go look at mine........
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