Pre 84 Trucks 1st gen pickups

79 charging system blues.

Old Mar 12, 2010 | 09:14 PM
  #21  
skinny_pedal's Avatar
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From: Bonney Lake, WA
Originally Posted by 79TONKATruck
lol that didnt turn out right

the good one lookes like

_L

E l l F


The bad one looks like

_F

E l l N
Your truck is a 5 pin regulator right?
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Old Mar 13, 2010 | 08:31 AM
  #22  
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From: Yakima WA
yeah it is
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Old Mar 13, 2010 | 02:42 PM
  #23  
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From: Bonney Lake, WA
Well with the L E F alternator my battery light wont come on in the dash and my my truck doesn't charge. What a pain this truck is becoming!
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Old Mar 16, 2010 | 06:37 PM
  #24  
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are u sure that the voltage regulator is the five pin and not the six beacuse thats how mine was and it didnt turn on the charge light
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Old Mar 17, 2010 | 03:09 PM
  #25  
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I had the same problem in mine a little while ago. I had to replace the regulator and rebuild the fuisible links. I ended up just rebuilding them with regular wire and putting in in line blade fuses.

did you get new or used voltage regulators?

I got mine used, but opened it up and cleaned all the dirt and junk out of it before i put it in. also, use a dental pick and rebuild your green fusible link plugs off the positive battery terminal. one of mine was fried inside and it looked fine from the outside.

i also have a truck with the factory voltage amp gauge, and it had a black box with two 5A fuses in it near the green connectors. if you have those make sure they aren't blown (although they may just be for the gauge)
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Old Apr 8, 2010 | 04:35 PM
  #26  
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Have you had any luck getting your charging right? Got my lights and all that faxed, it charged fine the last few weeks then last wednesday i took it down a muddy road annnnd now no charge. Brand new Alt. tested at 14.7 volts 3 times and the battery is brand new, roughed up all grounds and still nothin. Did have 1 bad fusible link and replaced it with no availe
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Old Oct 7, 2010 | 08:59 PM
  #27  
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From: Spokane, WA
Bumping this bad boy.
I have an L E F alternator chillin in my shop floor.
I need to know which wire runs where.
I know the B is the large white that goes to the battery. That's the charge line.
the L is the large yellow line
and F is the large green
and E is the white/black ground.

Which wire goes where? Which is the 12v sense, the ignition, and the light?
I have a regulator, too, but only 2 of the colors match up to the alternator
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Old Oct 8, 2010 | 06:53 AM
  #28  
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From: Bonney Lake, WA
Originally Posted by peow130
Bumping this bad boy.
I have an L E F alternator chillin in my shop floor.
I need to know which wire runs where.
I know the B is the large white that goes to the battery. That's the charge line.
the L is the large yellow line
and F is the large green
and E is the white/black ground.

Which wire goes where? Which is the 12v sense, the ignition, and the light?
I have a regulator, too, but only 2 of the colors match up to the alternator
Let me pull my schematic when I get home. Should be able to tell you.
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Old Oct 8, 2010 | 12:29 PM
  #29  
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From: Spokane, WA
Okay. I kind of figured it out last night, but id really rather have confirmation
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Old Oct 9, 2010 | 07:33 AM
  #30  
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From: Bonney Lake, WA
If it is a LEF alternator you should have a 5 pin regulator. Facing the female connector on the vehicle wiring harness for the
regulator, and proceeding clockwise from the blank pin position, the
pins are FIELD, BATTERY, IGNITION, LAMP, and GROUND.

That should help you. Good luck
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Old Oct 9, 2010 | 03:23 PM
  #31  
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From: Spokane, WA
Jackpot! Thank you sir!
(but you meant counterclockwise)

Last edited by peow130; Oct 9, 2010 at 03:24 PM.
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Old Oct 9, 2010 | 07:47 PM
  #32  
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From: Bonney Lake, WA
No I meant clockwise
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Old Oct 9, 2010 | 10:45 PM
  #33  
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From: Humboldt County, CA
when i had charging issues with my 79 i converted it to a newer style alternator from an 86. a bit more current and internally regulated. the newer alts have a diff mounting bracket though.

on my 82 after i killed the alt i threw on a gm 1 wire and it bolted up no problems with the trail gear alternator mount.
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Old May 6, 2012 | 03:12 PM
  #34  
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I am having charging issues too with my 81 22r? (not sure, the badge is gone) and want to do a gm 1 wire swap, but would love some instructions. I am planning to order the bracket from low range.
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Old May 6, 2012 | 08:09 PM
  #35  
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From: Sonora, CA (Central Sierra)
Holy Lazarus!

Don't do a 1 wire swap, do a gm 3 wire swap if you ate going to do anything. A forum search for 3 wire alternator will get you started.
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Old May 9, 2012 | 04:36 AM
  #36  
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I just spent an hour or so searching for alternator conversions for the older Toyota's. I have had no luck finding anything specific, it seems like all the write ups are for newer trucks.
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