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07-01-2021, 11:45 PM
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#1
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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Onan Quiet Diesel 7500
Hope everyone is prepping for the 4th and has a safe one , well we got stuck having to rent a cabin i could not get the generator going . So I've done a service which kit included :
-new oil / new oil filter / fuel filter / air filter all my other levels look good.
So i tried starting it and same scenario just cranked and cranked got a the light to flash ( 3X googled it and its a service code). So i started checking first at the 3 fuses behind the small panel and all were good and had power flowing through them. So i checked fuel coming into filter and there was fuel. Took a line off of the glow plugs and no fuel ever came up that far in any of the lines that comes into the glow plug. Would this indicate the pump is bad ? Any help is highly appreciated
i attached a picture with 2 wire circled , should i have power to these 2 wires or are they ground wires? Sorry if this is something i should know but this is my first time working on a generator. Thank again for all the help
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07-02-2021, 05:29 AM
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#2
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Senior Member
Join Date: Oct 2016
Location: Rendon, Texas
Posts: 1,465
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If your generator is like mine, the blinking light will direct you to a specific code in the codes list. You said it blinked 3 times. There are 2 sets of blinks you look for. The first set of blinks then a pause then a second set of blinks. Example 3 blinks followed by 6 blinks would direct you to code 36. What was the specific set of blinks that your generator light blinked?
__________________
May your smiles be many and the miles be plenty.
Karen & Allen Van Zandt
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07-02-2021, 05:35 AM
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#3
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Registered User
Join Date: Apr 2016
Posts: 370
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For mine, in the coach press, and hold the start/stop in stop and the fuel pump will run (will hear the clicking) without starting the generator for some seconds. The "clicking" will stop.
After changing my fuel filter, I press and hold the stop 3-4 times.
The same operation might occur at the start/stop switch on the generator, never tired it.
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07-02-2021, 12:04 PM
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#4
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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Quote:
Originally Posted by txcpl
If your generator is like mine, the blinking light will direct you to a specific code in the codes list. You said it blinked 3 times. There are 2 sets of blinks you look for. The first set of blinks then a pause then a second set of blinks. Example 3 blinks followed by 6 blinks would direct you to code 36. What was the specific set of blinks that your generator light blinked?
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Yeah it threw a code 36 - I also took the power supply from the rear of the genny. when i crank it those 2 wires have power now after i connected the power back on I'm assuming something must o reseted itself but still nothing .
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07-02-2021, 05:45 PM
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#5
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Senior Member
Join Date: Aug 2017
Posts: 423
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A code 36 is pretty much a worthless code to me, my hdjak threw a code 36 and after many dead ends I ended up having to replace the control board at mucho dollars! I hope you can fix yours more simply.
__________________
Carl
1998 Beaver Patriot Savannah
330 hp Cat 3126 DP
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07-02-2021, 06:08 PM
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#6
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Senior Member
American Coach Owners Club
Join Date: Jan 2011
Posts: 2,742
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Those 2 Wire are for the Governor Controller ---Only Hot as soon as She Starts
Code 36 is a Bear to trace to a Specific Issue- I would check the Fuel Pump for Flow- Making sure it turns on while cranking to Start it.
How many hours on it ?
"Took a line off of the glow plugs and no fuel ever came up that far in any of the lines that comes into the glow plug. Would this indicate the pump is bad ? Any help is highly appreciated"-- You mean the Injector Lines ??
__________________
Chuck
Brownsburg Indiana
1992 American Eagle-8.3C-450hp
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07-02-2021, 06:43 PM
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#7
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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Quote:
Originally Posted by NHRA225
Those 2 Wire are for the Governor Controller ---Only Hot as soon as She Starts
Code 36 is a Bear to trace to a Specific Issue- I would check the Fuel Pump for Flow- Making sure it turns on while cranking to Start it.
How many hours on it ?
"Took a line off of the glow plugs and no fuel ever came up that far in any of the lines that comes into the glow plug. Would this indicate the pump is bad ? Any help is highly appreciated"-- You mean the Injector Lines ??
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Yes sir the injector line sorry and this was while cranking
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07-02-2021, 06:45 PM
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#8
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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These onan if not baby sat seems like they grenade really fast and here i thought they were the top of the line . On my 06 Nomad Rampage Toyhauler same scenario with the generator always gave problems when heading out.
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07-02-2021, 07:05 PM
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#9
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Senior Member
American Coach Owners Club
Join Date: Jan 2011
Posts: 2,742
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Ray,
it appears your not getting Fuel to the injectors- Therefore your Controller either isn't sending B+ to turn on the Fuel pump or The Pump went South.
Disconnect the B+ wire on the Fuel Pump and apply an external 12V power source directly to the Fuel Pump-(White Wire) -See if it Runs and Pumps Fuel . The closest B+ is right at the battery power lugs on the back of the Genny- That will by-pass your Controller.
__________________
Chuck
Brownsburg Indiana
1992 American Eagle-8.3C-450hp
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07-02-2021, 08:04 PM
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#10
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
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OK RayAZ I've gotta ask the question; do you have more than 1/4 tank of fuel-are you sure?
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-03-2021, 05:48 AM
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#11
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Senior Member
Join Date: Nov 2017
Location: Back Woods of NC
Posts: 1,449
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Sufficient fuel - most have the pickup line at about 1/4 empty
Then prime the pump by holding switch in stop position
__________________
2012 Newmar King Aire + 24' Stacker = 74' of Chaos!
We usually have our 4 dogs with us - 2 Labs, 1 Chihuahua / Pug & 1 Corgi / Pappillon
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07-03-2021, 06:58 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Sep 2013
Posts: 2,508
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Quote:
Originally Posted by NHRA225
Ray,
it appears your not getting Fuel to the injectors- Therefore your Controller either isn't sending B+ to turn on the Fuel pump or The Pump went South.
Disconnect the B+ wire on the Fuel Pump and apply an external 12V power source directly to the Fuel Pump-(White Wire) -See if it Runs and Pumps Fuel . The closest B+ is right at the battery power lugs on the back of the Genny- That will by-pass your Controller.
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__________________
2014 Newell 2020P 45'8" ISX 600 HP
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07-05-2021, 08:59 AM
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#13
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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Quote:
Originally Posted by Ray,IN
OK RayAZ I've gotta ask the question; do you have more than 1/4 tank of fuel-are you sure?
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Yes sir its to the top.
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07-05-2021, 09:04 AM
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#14
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Senior Member
Holiday Rambler Owners Club
Join Date: Jun 2021
Location: AZ
Posts: 125
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Quote:
Originally Posted by NHRA225
Ray,
it appears your not getting Fuel to the injectors- Therefore your Controller either isn't sending B+ to turn on the Fuel pump or The Pump went South.
Disconnect the B+ wire on the Fuel Pump and apply an external 12V power source directly to the Fuel Pump-(White Wire) -See if it Runs and Pumps Fuel . The closest B+ is right at the battery power lugs on the back of the Genny- That will by-pass your Controller.
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So i disconnected the B+ from the back of the generator and i hooked up a lead wire straight to the pump with power+ ( would that be considered the injection pump ) i can hear I'm assuming another fuel pump somewhere in the bottom middle fo the generator kick on. Still nothing.....the pump does not kick on or engaging when i put direct power to those 2 connectors . Thanks again for all the help
Hope everyone had a happy 4th of july
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