New Alt ?
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Mountain Pass
Joined: Jul 2006
Posts: 115
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New Alt ?
Okay on my third alt in 3 weeks. This time got a new 135 amp question is when @ idle rev it lights brighten for a split second. I heard its because of higher amps. New batteries load test fine, didnt do this before new alt. Its constant, @ idle rev it lights brighten !
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
You need to get something to monitor your voltage to see what it's really doing. This is a REALLY difficult subject to diagnose. Check out this thread for some good links and information: https://www.ford-trucks.com/forums/1...going-out.html
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Mountain Pass
Joined: Jul 2006
Posts: 115
Likes: 0
You need to get something to monitor your voltage to see what it's really doing. This is a REALLY difficult subject to diagnose. Check out this thread for some good links and information: https://www.ford-trucks.com/forums/1...going-out.html
Hotshot
Joined: Apr 2010
Posts: 19,054
Likes: 235
From: Saratoga Springs,UT
Iv been down this road just put in a DC power alternator yesterday so far so good went with the 190amp alt
but 3 alternators in 3 weeks IDK wonder if you havea wire chaffe somewhere killing these alternators
I havent noticed my lights I will check it out later
I figure my stereo Kills them do you run any high power electronics
but 3 alternators in 3 weeks IDK wonder if you havea wire chaffe somewhere killing these alternators
I havent noticed my lights I will check it out later
I figure my stereo Kills them do you run any high power electronics
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Mountain Pass
Joined: Jul 2006
Posts: 115
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My latest alt I was told is a good one. Local shop that built the first 2 said he hooked me up. Its a china made wps piece of crap. I called wps and it is a 135 amp but it's their bottom line from china not in house. I can get that alt on ebay for 120.00, I paid 230 for my original built alt that lasted 5 days....anyways rambling, just ordered a dc 185 to end this madness.... Thanks for the input...
Hotshot
Joined: Apr 2010
Posts: 19,054
Likes: 235
From: Saratoga Springs,UT
I was Happy to see that
to the op
a 135amp alt is barly enough to run the truck especialy when the glow plugs and stuff are on
and I also got the wire upgrade with mine too good people at DC power he threw it in for free
and they were out of 185amp alt the other day whn that happens they send the next size up which would be a 190amp you might ge lucky
and get an even better one at a discounted price
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Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
If your lights get brighter when engine speed is raised, there is probably a poor connection between the alternator output and the batteries.
There is no way that an alternator, connected to 2 large batteries, could raise voltage high enough for you to see lights get brighter.
Try hooking a voltmeter across a battery and reving the engine. Then hook the same voltmeter to alternator output and rev the engine. The voltage readings should be the same. If not, there is a wire connection problem.
This happened to be with an '83 truck. Crummy connection to the battery was the cause. Easy fix, at least on a '83 with a straight 6 and no electronics.....
Lou Braun
There is no way that an alternator, connected to 2 large batteries, could raise voltage high enough for you to see lights get brighter.
Try hooking a voltmeter across a battery and reving the engine. Then hook the same voltmeter to alternator output and rev the engine. The voltage readings should be the same. If not, there is a wire connection problem.
This happened to be with an '83 truck. Crummy connection to the battery was the cause. Easy fix, at least on a '83 with a straight 6 and no electronics.....
Lou Braun
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Mountain Pass
Joined: Jul 2006
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I have had 4 alternators on this truck in 3 weeks, this is the only one that does this. Getting a spike around 16 volts. Wps rep said bad internal voltage reg.. Dc rep said they are backed up, maybe I will get a upgrade also said it won't ship till end of next week...
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Mountain Pass
Joined: Jul 2006
Posts: 115
Likes: 0
I have had 4 alternators on this truck in 3 weeks, this is the only one that does this. Getting a spike around 16 volts. Wps rep said bad internal voltage reg.. Dc rep said they are backed up, maybe I will get a upgrade also said it won't ship till end of next week...
Hotshot
Joined: Apr 2010
Posts: 19,054
Likes: 235
From: Saratoga Springs,UT
3 alts in 3 week just dont seam right to me no matter the brand
Id be doing some trouble shooting before I put that DC power alt on
Id be scared to burn it down too
have you cleaned ALL terminals
and the two main engine grounds one by the A/C pump and the other one by the power steering pump
I also cleaned the terminals at the starter too
Id be doing some trouble shooting before I put that DC power alt on
Id be scared to burn it down too
have you cleaned ALL terminals
and the two main engine grounds one by the A/C pump and the other one by the power steering pump
I also cleaned the terminals at the starter too
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Mountain Pass
Joined: Jul 2006
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The stocker just died from old age, the other 2 were local high amp large case rebuilds that worked but burned internally the one now is china junk. Believe me I have checked, cleaned, tightened everything. That Dc will fix all my woe's...
Hotshot
Joined: Apr 2010
Posts: 19,054
Likes: 235
From: Saratoga Springs,UT
for now
good luck with it
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Mountain Pass
Joined: Jul 2006
Posts: 115
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Rec my dc 185 alt about a week early, hoping for the upgrade but I'm stoked with the quality of this alt.. All problems I was having with 3 previous alt's are cured.. If you need a alt don't mess around like I did just order the dc...
Fleet Mechanic
Joined: Jun 2006
Posts: 1,589
Likes: 20
If you lights continue to get brighter when you rev the engine wit this latest ALT, I would check the glow plug relay circuit. It is the only circuit on the 6.0 that can pull that kind of current other than a short circuit which would blow a fuse. I would check you fuse panel for a blown fuse.
When I got my upgraded ALT it had a smaller then OEM pulley. I installed as is but noticed the belt tension was not as tight. I replaced to upgraded ALT pulley with the OEM pulley to insure the belt and other accessories would not be damaged.
Also, if you start you truck in the dark and turn the headlights on you will notice that after about 15 to 20 seconds the lights will get brighter. That is normal and is caused by the glow plug relay timing out and no longer drawing almost 100 amps.
DSMMH
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