OT Anybody know the wiring on a 1990 Chevy truck 7.4 engine?

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moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Nov 17, 2018

• #1

The serpentine belt shredded itself and while it flailed around it got hold of the wiring that plugs into the side of the alternator and ripped it out of the plug. Anyone know what the pinout is on the alternator? What wire goes where? I loaned out my factory service manual never to be seen again.

 

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Ringleboy26

Aluminum

Joined

Mar 14, 2007

Location

WI

• Nov 17, 2018

• #2

Pm me your email I’ll take a pic of the alternator in my topkick with the 7.4. I’ll have to wait a bit till it’s light out to make sure I don’t get shot at by the opening day hunters lol

 

Cole2534

Diamond

Joined

Sep 10, 2010

Location

Oklahoma City, OK

• Nov 17, 2018

• #3

Mercuiser Marine used those engines by the train car, and they also built quite detailed service manuals to go with them. I'd download one of those, that pinout is going to be unchanged.

Sent from my SM-G930R4 using Tapatalk

 

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Ringleboy26

Aluminum

Joined

Mar 14, 2007

Location

WI

• Nov 17, 2018

• #4

I got some pictures of the plug for you. The wire colors yellow red pink white. White being the large pin on the plug.

 

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SteveBausch

Stainless

Joined

Jan 11, 2010

Location

Indianapolis

• Nov 17, 2018

• #5

Libraries are great sources, call one and talk to the Reference Department.

Detroit libraries had/have copies of all U.S. patents.

Detroit, Michigan | USPTO

Patents and Trademarks | Detroit Public Library

 

M

moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Nov 17, 2018

• #6

Ringleboy26 said:

Pm me your email I’ll take a pic of the alternator in my topkick with the 7.4. I’ll have to wait a bit till it’s light out to make sure I don’t get shot at by the opening day hunters lol

Click to expand...

your pm is full.

 

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Ringleboy26

Aluminum

Joined

Mar 14, 2007

Location

WI

• Nov 17, 2018

• #7

I Emptied it out

 

M

moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Nov 22, 2018

• #8

I found my 1994 Buick Roadmaster Station Wagon manual. I miss that car, anyway I had the wiring correct so I brought the alternator that I purchased at the local NAPA store 91,700 miles ago and they replaced it under warranty for no charge! All is well again.

 

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Greg White

Titanium

Joined

Jan 22, 2007

Location

Pinckney Mi.

• Nov 22, 2018

• #9

I had a 94 Caprice, 350 CI, bought er new.
nice driver,yup.
Gw

 

M

moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Nov 22, 2018

• #10

Greg White said:

I had a 94 Caprice, 350 CI, bought er new.
nice driver,yup.
Gw

Click to expand...

I never could believe how fast my Buick was, if you wanted to pass on a 2 lane 40 to 80 was amazing for that big ol boat. I was looking around for another one but I'm not paying the 8 to 18 grand they are asking for one now days