Battery Light
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Senior User
Joined: Jun 2011
Posts: 203
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From: Eugene, OR
Battery Light
Good morning everyone. I'm running into a small problem. I have a 2003 F350 SRW CCSB with a 6.8 V-10. The truck has around 138,000 on it and it has the original alternator. This is my daily driver.
Yesterday, while the wife and I were in McDs drive thru, I had the steering wheel cranked a bit, but not all the way, and I look at the instrument cluster and the battery light is on. I have a Scan Gage 2 on the dash and it was reading 13.6 volts. The light was on for maybe 5 seconds. It did not come back on the rest of the trip, about 3 miles.
Now today, I drove it into work, about 9 miles and it didn't come on during the trip in. I stopped at the front lobby to get screened to go to work, I hopped back in and started it and the battery light come back on for about 5 seconds after all the usual light went out. I again checked the Scan Gage and it was reading 13.6 volts again.
The headlights did not dim. The stereo worked as usual. Heater didn't miss a beat.
The alternator, as far as I know, is the original one. The battery is fairly new. I replaced it in April of 2020. Does it sound like the alternator is going south on me? Any advise would be greatly appreciated.
Thanks.
Yesterday, while the wife and I were in McDs drive thru, I had the steering wheel cranked a bit, but not all the way, and I look at the instrument cluster and the battery light is on. I have a Scan Gage 2 on the dash and it was reading 13.6 volts. The light was on for maybe 5 seconds. It did not come back on the rest of the trip, about 3 miles.
Now today, I drove it into work, about 9 miles and it didn't come on during the trip in. I stopped at the front lobby to get screened to go to work, I hopped back in and started it and the battery light come back on for about 5 seconds after all the usual light went out. I again checked the Scan Gage and it was reading 13.6 volts again.
The headlights did not dim. The stereo worked as usual. Heater didn't miss a beat.
The alternator, as far as I know, is the original one. The battery is fairly new. I replaced it in April of 2020. Does it sound like the alternator is going south on me? Any advise would be greatly appreciated.
Thanks.
Fleet Mechanic
Joined: Oct 2004
Posts: 1,395
Likes: 105
From: Southern KS
Both of the V10's I have been driving since 1999 had the alternator go out at around 75k miles and roughly 10 years or so. If you replace I highly recommend getting a motorcraft unit. Do the belt at the same time if it's original.
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