Topic: 81 Alternator

[81MudToy]

My alternator on the 81 toyota 4x4 went bad while running tru mud, I have a 82 2 wheel drive auto, that is for parts, Can I use the Alternator from the 82 on the 81. It all looks the same.

[jimbo74]

if all the wires are the same, toss that puppy in

[81MudToy [OP]]

O.k. how do you know if it’s external regulator or internal, and what’s the difference between green plug and black.

I just notice mine has one wire in the back which the 82 does not have, other than that, everything is the same.

 

[Marlin]

No, No, and No.

4x4's use a BLACK plug and are 55 amps.
4x2's use a GREEN plug and are 40 amps.

2wd's use a mechinal voltage regulator, 4x4's use a electronic (IC) regulator with a charge light relay.
These two systems cannot be mixed up.

Check the color of the plug and do it right.

Marlin

[wakkjobb]

I'd listen to him, he might know a thing or three about Yotas...   
Isn't there a 3 prong and 4 prong alternator/plug? I ran across that a while back on my truck...

[81MudToy [OP]]

O.k.....finally found one, all auto parts would give me the same, and say they both work 4x4 or 4x2, I found a place that fixed it. Auto parts do not know cheetosss about stuff.

Gracias Jimbo, Gracias Marlin & wakkjobb.

[Marlin]

Yes, you are correct.

To set the record straight:

The black plug 55 amp alternator IS used on some 4x2 trucks.
They are found on Canadian, and USA frigid zone pickups.

Living in Fresno with 110 degree summers, I do not recall ever seeing a black plug on a 4x2 truck.

Glad you got it fixed.

Marlin

[trucha]

Hey guys I got this 80yota as a project...seller told me  the tranny was bad...I trailer it home and here we go...tried to start it, did not start,,change the starter,,,the clutch would not go down so I cange the clutch master and slave.. with the new starter the engine cranks but thats it, check fuel system and I get fuel to the carb...change spark plugs and nothing.. the engine just cranks...check for spark...no spark...change ignition coil..no spark..am checking my ignition componets with my omm meter and i get nothing....am getting nothing...am thinking is electrical...whats ur imput...thanks

[81MudToy [OP]]

I think you need to check your timing belt chain; this has nothing to do with an alternator.  :welcome:to Marlins

[81MudToy [OP]]

Sorry, I have the wrong answer. Truchaaaaaaaa