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Onan microlite 4000

myface
Explorer
Explorer
I have Onan Microlite 4000 4KY FA261100J. Does any one have wiring diagram for that genset. I have 3 different but none shows wiring for mine. What is most confusing, all shows 15 pin connector and mine have way more pins going to computer. I am having problem with fuel shut off solenoid - not getting voltage. Previous owner replaced carburetor and mess up the wiring going to fuel shut off solenoid. I am trying to locate the pin so I can bypass the wire and run new one. The gen will run if I jump 12v to that solenoid.
30 REPLIES 30

enblethen
Nomad
Nomad
Jumping is quickest way, however you could have vacuum leak if on engine side of carb.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

myface
Explorer
Explorer
The previous owner replaced the carburetor and apparently got the wire pinch. My options: jump the wire, take of the carburetor or take the gen down on ground to get access to this wire. I vote for jump.

enblethen
Nomad
Nomad
Sounds like on right track!
I would hate to see you bypass the wire and have it be a pin in the connector.
With your posts on other items, the previous owner(s) must have really butchered the wiring.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

myface
Explorer
Explorer
I did try but I am getting mix results. Suspecting damage wire

enblethen
Nomad
Nomad
It is possible that the pin is pushed back into the connector.
Yes, pin 3
You should be able to back probe the wire in the connector to check for output or have you tried to do so.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

myface
Explorer
Explorer
There is better photo of computer connections http://jestarkel.com/pics/3.jpg
Unlike the other connectors this one have 3 rows of pins. Looking horizontal from 1-8 the 3rd one should be the fuel shut off solenoid. Previous testing that one shows occasional continuity, but was not conclusive. I an suspecting the wire is damage that is why I am trying to bypass.

enblethen
Nomad
Nomad
Those photos opened.
In photo one, I can see pin numbers on the right side.
Pin 2 on the J connector should go to the fuel solenoid.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

myface
Explorer
Explorer
http://jestarkel.com/pics/1.jpg

http://jestarkel.com/pics/2.jpg

works for me.

MountainAir05
Explorer II
Explorer II
https://www.partsfortechs.com/asapcart/index.php?main_page=product_info&products_id=1384

Another source maybe and only if needed. Needs some more troubleshooting .

enblethen
Nomad
Nomad
Is this what it looks like?
Circuit board

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

enblethen
Nomad
Nomad
Search sys that is a panel membrane.
Your previous post of photo did not work for me.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

myface
Explorer
Explorer
Numbers from sticker 300-5446 ES-0243560G13

enblethen
Nomad
Nomad
Can you get the computer number off yours? Do not try to use from drawings.
Looking at a couple drawings, some of the pins are not used and on drawing that shows remote (fig 12-21) start indicates less wires and then jumpered at remote start/stop.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

enblethen
Nomad
Nomad
Spec letter is commonly in a separate block from model number.
Will look to see what I come up with.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker