Isslandboy
Hi 
Having an issue with a 16kw air cooled generator.  
Model G0064622
serial #3000744662
Prod date 20160808
It has thrown the 1505 code
Battery terminals are clean
Battery shows 13.00 volts
When I reset the code and try a manual start the voltage at the battery doesn't change.
There is a buzzing noise for several seconds and then the 1505 code
I swapped out the relay with one That I know works, no change.
There is 13 v at the starter terminal
Do not get any voltage at the small wire that excites the solenoid pull in action.
When I jump between the main starter terminal and the lower terminal on the solenoid, a few sparks, but nothing else.
Any and all suggestions appreciated.
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grsthegreat
1505 can be either the starter motor issue or the generator is missing the ignition pulse from the coils. my guess would be either a bad starter or loose ground. did you trace the ground wire to the point that it attaches to the frame down by the starter. i have found many units where this wire has gotten loose. also make sure you cant twist the battery cable lugs.

your unit is still under partial warranty, why not have generac tech fix it
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Isslandboy
grsthegreat wrote:
1505 can be either the starter motor issue or the generator is missing the ignition pulse from the coils. my guess would be either a bad starter or loose ground. did you trace the ground wire to the point that it attaches to the frame down by the starter. i have found many units where this wire has gotten loose. also make sure you cant twist the battery cable lugs.

your unit is still under partial warranty, why not have generac tech fix it


Hi thanks for the quick reply, the ground has been checked and is good, as have the terminals.  The engine does not even attempt to turn over , only a buzz and then the code, if it's not even turning over, could it still be the coils.  As I said when I short the starter posts, there is no reaction from the starter?
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Isslandboy
Isslandboy wrote:


Hi thanks for the quick reply, the ground has been checked and is good, as have the terminals.  The engine does not even attempt to turn over , only a buzz and then the code, if it's not even turning over, could it still be the coils.  As I said when I short the starter posts, there is no reaction from the starter?


Also, we are in the Republic of Panama, no service here at all, last time we put in a warranty request we waited a month and finally fixed it ourselves.
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78buckshot
If you are connecting the correct terminals on the starter and get no action then I would say the solenoid or starter motor is bad.
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Isslandboy
Hi, pulled the starter, and connected it on the bench, armature spins, bendix pulls in.  The buzzing noise for a couple of seconds and then the code being thrown has me confounded?
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ohmslaw
Check the fuse
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78buckshot
Starter motors can be a little tricky, the no load test on the bench won't tell the whole story. Remount the starter on the unit, make sure your battery cables are perfect and re-test, if the solenoid/starter will spin the engine over with the 'hot-wire' test then you'll have to work your way backwards up the stating circuit.
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Isslandboy
I agree, I remounted the starter, I have taken the side panel off for better access, when I reset the panel and use the manual function with my hand on the starter assembly there is nothing.  Is there anything upstream of the starter besides the relay that controls the start circuit?
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grsthegreat
have you left a test meter on the battery when trying to start the unit. 13 volts no load doesnt mean anything. what is the voltage while trying to start it
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Isslandboy
Got it sorted guys, it was a combination of a bad testing jumper cable and a bad ground cable, ends looked fine but was corroded under the insulation.  Thanks for all the suggestions, you kept me on the right track.  Great to have all the smarts of you guys available!
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78buckshot
Bingo!
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grsthegreat
good to hear...i was sure it was a ground issue. seen it so many times.
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