| Author |
Message |
David GMC 4905A
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 8:31 pm: | |
Prior to the following the bus started fine.
The Bus was being started as normal. It was cold (40 deg) and was sounding like it wanted to start but did'nt.
After the 3rd try and not wanting to over heat the starter I let it rest. Later when I tried starting the bus, nothing happened.
The batteries have tested good and I have verified that my starter is good (removed and tested).
What I have discovered is there is no power at the generator.
Have I blown a fuse or something?
If I'm leaving out something that would be helpful I will try to clarify.
Thanks for any help/suggestions |
Richard4905
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 8:55 pm: | |
Check the batteries post and make sure one did not melt. If not check ground wire and see if it is burned. Have had both things happen on my 4905
Good luck and let us no. |
Stephen Fessenden (Sffess)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 8:59 pm: | |
Check for power at the starter itself. Have had the wire burn in two en route to the starter. |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 9:00 pm: | |
no power at the generator ???? |
David GMC 4905A
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 10:00 pm: | |
When I flip the power toggle switch everything looks and sounds normal.
When I then flip the starter switch...nothing.
Battery posts good.
Would I have power to the dash (which I do) if the ground wire was burned?
In the GMC electrical circuit wiring diagram they say generator for what I would call an alternator. |
mclough
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 10:05 pm: | |
what about the starter selnoid? do you have power to it. |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 10:09 pm: | |
how do you 'flip the starter switch'....guess I don't understand much....'power to the generator'................wow.... |
David GMC 4905A
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 10:38 pm: | |
Sorry if my description fails to give a picture you can help with twodogs. I have appreciated many of your past posts and am sure you know more about this stuff than I do.
mclough - I was planning a more thorough check of where I have power tomorrow. thanks
I can follow the wiring diagram I have but hoped that somebody might have had a similar problem and save me some time and/or loss of sleep. |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:07 pm: | |
try tapping on the solenoid with a hammer while somebody repetedly pushes the start button |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:09 pm: | |
do you have your block heater plugged in |
Brian (Bigbusguy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:25 pm: | |
You need to check if you have power to the starter . There is a bulkhead battery lug that the main battery cable 0000 size goes to just below the starter nearer the pass side. You should have power check the connections there. If you have the muffler under the rear seat the inside one is very hard to reach almost have to pull the muffler . You maybe able to reach it from the muffler access hole in the floor.
You also need to check all the connections on the master switch and all the ones near there I had to clean every connection and tighten all around the disconnect switch on my 4905 even one that was tight was not making a good connection.
The front half is powered from the disconnect switch area . Most of the rear comes off the start solenoid Batt stud. SO If your Alt has no power there is no power to the starter .
Also check all the grounds .
If you still have the access hole open the the heater valves you should be able to reach the stud the hot comes form the disconnect switch and check it out.
Brian 4905 Klamath Falls Oregon |
james dean boggs (Jd_boggs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:40 pm: | |
I had exactly the same problem 3 months ago. The connection to the starter was very dirty and pitted. Cleaned it and all problems went away. Make sure all the electrical studs are clean. Make sure you didn't run down the batts. You should also be able to short the solenoid with a heavy wire to see if have enough power to turn the starter.
Good luck. |
james dean boggs (Jd_boggs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:45 pm: | |
PS.....twodogs has the rght idea.
Tapping the solenoid with a hammer while someone throws the switch exposed the dirty contact on my bus. |
Kenny Cole
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, February 01, 2005 - 11:47 pm: | |
Dear David;
I had similar symptoms on my 4106...one nut that attaches the solenoid to the starter...vibrated loose not once but twice within a months period. I ended up running another nut up behind the one that kept loosening after applying LOCK-TITE to the threads. BTW I discovered this problem after checking all my other connections. Hope you're back on the road soon.
Lord Bless You,
Kenny Cole |
Frank Allen
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 02, 2005 - 1:17 pm: | |
Ive had the problem too, it was the ground conection on the rear bulkhead, cleanes it and she took right off, if its that cold you should be using your block heater, my 8/71 dont like cold no better than i do
Frank allen
4106 |
David GMC 4905A
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 02, 2005 - 2:11 pm: | |
I love this board! Thank you so much.
There was a bad ground to the starter.
I assume the worst and start looking at the wrong end of the equation.
My kids band Foxfire Bluegrass also thank you all for the help. |
Brian (Bigbusguy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 02, 2005 - 3:23 pm: | |
Good news and you did not have to use a hammer.
Brian 4905 Klamath Falls Oregon |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 02, 2005 - 6:42 pm: | |
Kenny Cole said:
"BTW I discovered this problem after checking all my other connections. "
My God! I have a kindred spirit. Someone else that finds the problem in the last place they looked!
[I ain't gonna admit that sometimes it's the 3d time thru the "last" place when I finally get a clue! LOL!!!]
Onward and Upward |
Brian Brown (Fishbowlbrian)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 02, 2005 - 10:31 pm: | |
Glad you got it fixed. Ain't this fine group of folks... a fine group of folks.
BTW, I Googled your kids' band and found 'em on:
http://www.foxfirebluegrass.com/Foxfire%201/Foxfire%20Main.html
What a cool family affair you have there, David. Must be one proud papa...
I love the pics of your youngest holding that humongous upright bass. Must be a hoot to watch him play it!
Happy bussin (and pickin' and grinnin')
FBB |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, February 03, 2005 - 5:53 am: | |
"it was the ground conection on the rear bulkhead, cleanes it and she took right off,"
It is a good Idea to clean that connection on a regular maint sked.
IF one of the grounds is a bit dirty , you can overcharge charge one set of batts , while sensing the other.
This may or NOT show up on a dash voltmeter , or it will show as loss of oil pressure and high temp on electric gages.
FAST FRED |