Tisha (152.13.205.173) - Thu Jun 4 09:35:28 2009

I just bought a 1999 F250 7.3L powerstroke truck and when I drove it home, the battery light came on for a little bit and then went off. I've continued to drive it with no problems, but then last night I was driving it and the battery light came on and started blinking. The truck continued to run fine, but I'm not sure if this is a battery issue or an alternator issue and wondered if anyone else had any problems. The batteries shouldn't need to be replaced yet.

Also, the truck has a 3" lift on it and it makes turning and backing with my horsetrailer more difficult than normal. I live in NC, does anyone want my lift. If you know what you are doing you can take it off my truck and put it on yours.

Reply #1 Steve (207.255.158.52) - Wed Jun 24 08:59:34 2009

We are having the same problem on a 2001 F250. The altenator has been replace, the battery is fine.

Reply #2 donny (67.58.220.33) - Wed Jul 15 06:47:17 2009

i have the same problem with my 2005 6.0L, just fixed it it was the voltage regulator in the altenator.

Reply #3 donny (67.58.220.33) - Wed Jul 15 06:47:57 2009

i have the same problem with my 2005 6.0L, just fixed it it was the voltage regulator in the altenator.

Reply #4 chris ackerson (72.14.18.66) - Tue Aug 4 13:49:06 2009

I have an 02 ford f-250 with the 7.3 and my battery light was doing the same thing...it would be on one min off the next would stay on when i started it or not ... all at once i started losing power throught the truck.... changed the alenator and its fine

Reply #5 doug (76.122.168.205) - Mon Aug 10 19:04:59 2009

I have a 02, f250 , 7.3 and I have replaced the alt. twice. both times the output has only been between 7.5 and 10.1. both batterys are new. where is the voltage. regulator on that truck?

Reply #6 Dan (68.47.61.238) - Fri Aug 14 15:00:23 2009

I have a 1999 Ford F250 7.3L diesel. My battery light started to blink on and then would go off minutes later. Checked the voltage from the alternator when light was out and it is ~13 volts then 7 volts when the light is on. It appears that I need a new alternator or regulator if it can be replaced separately.

Reply #7 Pat (216.150.107.134) - Mon Aug 24 08:49:14 2009

I have a 2000 excursion & i have put 5 alt.s on it, it fixes the problem every time but dont know why it keeps going bad, has anyone else had the same problem with theirs going bad

Reply #8 Joe Crowe (155.104.37.18) - Tue Sep 29 14:00:17 2009

Try disconnecting the glow plug relay and test it out.

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