Alternator?
#1
Alternator?
Started the beast 10 min before end of work yesterday to warm up. after I punch out I hop in and immediately notice batt light lit. Great figure I'll make it home as soon as i put her into gear and gave some throttle light shut off. stopped to eat, afterwards starts up fine no light the whole way home. fast forward this morning.
Go out fires up SLOW seemed glow plugs were on a little longer also. five seconds after starting batt light reappears, after 10 sec shuts off about a min comes back on. grab a cig lighter alt/voltage tester it is all over the place 11.1 with no throttle 14.2 under slight throttle. after warm 14.2 constant.
Here is what I've done to diagnose. 1. removes heavy wire eyelet from back of alt, cleaned reinstalled other wire plugin nice no corrosion.2. load cell tested batteries, pass.side failed replaced, driver side passed. 3. took to Oreilly's had alt tested, numbers all over the place. no alt response for 15 sec after startup than slight charge.
One last thing after 5 mile drive the alt is effing warm almost too hot to hold hand against. Sorry such a long rant just want to be thorough!!!!
Go out fires up SLOW seemed glow plugs were on a little longer also. five seconds after starting batt light reappears, after 10 sec shuts off about a min comes back on. grab a cig lighter alt/voltage tester it is all over the place 11.1 with no throttle 14.2 under slight throttle. after warm 14.2 constant.
Here is what I've done to diagnose. 1. removes heavy wire eyelet from back of alt, cleaned reinstalled other wire plugin nice no corrosion.2. load cell tested batteries, pass.side failed replaced, driver side passed. 3. took to Oreilly's had alt tested, numbers all over the place. no alt response for 15 sec after startup than slight charge.
One last thing after 5 mile drive the alt is effing warm almost too hot to hold hand against. Sorry such a long rant just want to be thorough!!!!
#2
...grab a cig lighter alt/voltage tester it is all over the place 11.1 with no throttle 14.2 under slight throttle. after warm 14.2 constant....3. took to Oreilly's had alt tested, numbers all over the place. no alt response for 15 sec after startup than slight charge.
2. load cell tested batteries, pass.side failed replaced, driver side passed.
Always, always, always replace both batteries, if funds allow.
Stewart
Last edited by Stewart_H; 01-22-2015 at 09:12 PM.
#4
#5
Still, be safe and monitor the drivers side battery. Never know how much stress was put on it by the passenger side being bad.
Stewart
#6
#7
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#10
Update new motorcraft alternator and 2 new group 65 880 cca interstate batteries installed. charging good and steady!
One final question is there suppose to be a delay perhaps from after start glow plugging from time between startup and when alt begins to charge seems to be still a 15sec delay. after about 15 seconds jumps right up to 14.2 volts. anyone ever done a realtime startup voltage check?
One final question is there suppose to be a delay perhaps from after start glow plugging from time between startup and when alt begins to charge seems to be still a 15sec delay. after about 15 seconds jumps right up to 14.2 volts. anyone ever done a realtime startup voltage check?
#11
I am on my third alternator for a 2005 6.0. It ( the alternator ) always seems to go caput when I am in the middle of nowhere on a holiday weekend and what I end up with because it is all I can find is an overpriced Ford remanufactured unit. Both times I have replaced mine have been at a national forest campground.
Will be researching a quality aftermarket unit when it warms up around here.
Will be researching a quality aftermarket unit when it warms up around here.
#12
Join Date: Mar 2009
Location: Mt. Shasta California
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I am on my third alternator for a 2005 6.0. It ( the alternator ) always seems to go caput when I am in the middle of nowhere on a holiday weekend and what I end up with because it is all I can find is an overpriced Ford remanufactured unit. Both times I have replaced mine have been at a national forest campground.
Will be researching a quality aftermarket unit when it warms up around here.
Will be researching a quality aftermarket unit when it warms up around here.
#13
Update new motorcraft alternator and 2 new group 65 880 cca interstate batteries installed. charging good and steady!
One final question is there suppose to be a delay perhaps from after start glow plugging from time between startup and when alt begins to charge seems to be still a 15sec delay. after about 15 seconds jumps right up to 14.2 volts. anyone ever done a realtime startup voltage check?
One final question is there suppose to be a delay perhaps from after start glow plugging from time between startup and when alt begins to charge seems to be still a 15sec delay. after about 15 seconds jumps right up to 14.2 volts. anyone ever done a realtime startup voltage check?
on the 6.0, the glow plugs continue to stay energized for almost a minute at times after starting.
so yeah, it's normal for the voltage to be low at first. then suddenly jump to 14 volts. really freaked me out on my old 6.0 until I was reading about the PSD charging system inthe 6.0 section here on FTE.
#14
Are any of you guys having any sort of other odd electrical issues? Perhaps an odd stumble here or there, low power rarely or even a random dead pedal? My old mans 6.oh was eating alternators and Boyer found a chaffed main engineharness under the hood replaced that sucker and he has been good