7.3 Alternator issues - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 10-21-2012, 09:10 AM Thread Starter
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7.3 Alternator issues

My 2002 Excursion is going through alternators about every four months. Anyone else having this issue and is there a solution?

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post #2 of 5 Old 10-21-2012, 09:21 AM
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My dad has a 97 f350 7.3 and we have put 3 alternators on it in the last two years. I cant figure out what the deal is.

03 f350 sd 4x4 cclb

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post #3 of 5 Old 10-21-2012, 09:52 AM
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What kind of alternators are you putting on it? Are they new or rebuilt? Where are you buying them from?

How old are the batteries? Have they been tested recently?

Alan
2000 F-350 CC LB DRW 4x4 XLT Auto

- Intake
- Exhust
- ScanGauge

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post #4 of 5 Old 02-06-2013, 05:07 PM
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I know this is a late response but it may help someone.

Had this issue on a company truck years ago. After many alternators and a wiring harness we discovered the glow plug relay was sticking. After correcting the issue and driving a few more miles a glow plug came apart and went through a cylinder. I recommend replacing the relay and plugs. That is what fixed that one. Well a long block fixed the plug issue so i recommend doing them before they come apart if this in fact your issue.

99 F350 4x4 7.3 6 speed w/480K
02 F250 4x4 7.3 Auto w/490K
00 Excursion 4x4 V10 w/140K

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post #5 of 5 Old 02-07-2013, 12:21 PM
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The alternator harness goes bad and it will eat alternators. There is a replacement harness available. Seen 2 trucks with this problem, new harness fixed both.
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