'02 7.3 Won't Turn Over - Ford Powerstroke Diesel Forum
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Old 08-16-2013, 05:12 PM
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'02 7.3 Won't Turn Over

Hello All,

I drove the truck with no problem this morning to go to my son's school orientation. Left there and went to lunch, when going to leave from lunch first attempt to start turned over sluggish and did not start. Second attempt started. Went to daughters orientation and cranked fine leaving there. Went home parked it for a couple hours and then went to run an errand. It turn sluggish on the first attempt and then nothing on every attempt after that.

On each attempt after the first, the 4x4 and Low Range lights flash once and it beeps.

Here are the things that I have checked and or tried:

1.) Attempted to jump from a friends 7.3 - no luck - did not turn over
2.) Tested voltage on each battery with cables disconnected (12.75v & 12.76v)
3.) Shifted to Neutral and attempted to start - no luck - did not turn over
4.) Swapped starter relay (#307) with other relays - no luck - did not turn over
5.) Checked Torx bolts under dash on steering column - no luck - did not turn over
6.) Checked Fuse #40 - Fuse is good

One item I am waiting on a second person in order to test is to confirm voltage to Starter Solenoid while attempting to start.

Aside from the pending item I mentioned, are there any other thoughts or suggestions?

Thanks,

Bill
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Old 08-17-2013, 06:18 AM
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Coupla things....

First, although your Voltage reading are telling you there's 6 cells in the battery producing voltage, it is NOT a test of weather or not those cells are good. You need a Load Test on each battery at a High Rate (not the 100A, puny, testers the Parts Stores have).

Next, what happens when you roll the key to Start? You hear Anything from Anywhere? If so, find out where a "click/clunk" is coming from.

If not, try holding the pointer up past P (to the drivers door) or even R or D.

Turn the headlights ON and have some one watch them as you try to crank it over. Do they dim a little? A Lot? Not at ALL?

You can try to "rap" on the stater body itself, with a hammer, a few times to try to dislodge a stuck Bendix or brush.

BUT, where to concentrate depends on the headlights and noises from here
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Old 08-17-2013, 07:21 AM
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That is not enough voltage to turn the engine over. Batteries should be at about 13.4 volts. My guess is that you alternator is bad, and the truck was running on the batteries. I would try to jump it and see if you can get it started. If so and the truck runs when you disconnect the jumper cables then watch the volt meter in your dash. If is starts dropping continiuously then you have a bad alternator.
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Old 08-17-2013, 08:35 AM
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Quote:
Originally Posted by Jakeman711 View Post
That is not enough voltage to turn the engine over. Batteries should be at about 13.4 volts.
????

No way! You do NOT get 2-1/4v per cell. Static voltage on a normal battery is just what he's seeing. I think you're confused by what a running voltage should be....
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Old 08-17-2013, 04:01 PM
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During testing this morning, found that had good voltage to solenoid, but starter was not engaging (even with screwdriver between the posts on solenoid).

Problem solved, it was the starter. I replaced with a new (not reman) and starts like a champ.

Thanks for the input and suggestions!
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Old 08-18-2013, 03:40 AM
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You are correct, I misread the post. Static voltage should be between 12.4 and 12.7 volts.
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