OLD motor home needs help..gen won't work...

[LVRVLUVR]

1993 tioga ..2.8 onan ....coach batters good every thing works so far but the fridge and the gen, the remote switch on the range hood does nothing on the meter... so I pulled the panel.... there's a red and a black going to the meter...both hot , red has a dimmer light on the tester.... the black jumps across to the start stop rocker switch,,, there's power to the middle lug,,, and it get power to the what ever side you push on the rocker....

the gen start button does nothing... and there is no power to the 5amp fuses


the hour meter does show anything either...

does the "93" have a circit board??? the big white wire has power at the gen...

[LVRVLUVR]

did I stump IRV2?

[LVRVLUVR]

to start with... it's a 93 onan 2.8.... when you push the start button nothing happens on the remote start , or the gen. on the remote, it's on the range hood... nothing on the hour meter...pushing the button does nothing

so I took the panel off..there power going to the meter. the start / stop button has power... what ever side of the rocker switch you push gets power I don't "Think" there is a circit board..

there's power going to the main power to the gen...but nothing happens when you push the gen start button at the gen... it doesn't click or any thing????

in all my years of RV'n never came across this... also there is no coach shut off anywhere... but there is an axlinery button if one battery goes dead for momitary... batterys have 13 v... every thing works in this coach now but the fridge and gen....

I bought two of these old coaches the other day , one for my youngest son that is still in school, the other for my employee that has been a real good worker for the last 15 yrs at our shop....he went through the hard times stretch lost his home and is now a renter trying to work his way out of the hole and raise three kids in school...

one of the rv's is the very rare hard to find 93 class c 18.6.. it has the huge rear dinnete that make a king size bed , plus the bed above the cab..the 460 runs purrfect with power to spare....gonna be a restoration project for my son and me ..

we would love anyhelp as to what else to check on the gen.... pretty much has me stumped so far

[Lifemember]

Hope this will help

http://www.flightsystems.com/pdf/ona...oing-guide.pdf

A wiring diagram for the Onan generator start circuitry..Winnebago

[Mudfrog]

We looked at that same floor plan back in 1993. Only it was on the Chevy chassis with the 350 engine, (the Ford part might be what makes it rare).. Anyway, it was a neat little set up but we ended up finding and buying our first class A instead, (it was priced right).

On the genset question. This may not be anything like yours but,,, our used 1977 Minnie Winnie had a generator that had intermittent starting problems after we first got it. Sometimes it would do nothing when either start button was pushed. I finally decided to see if i could figure out what was wrong and it turned out to be something fairly simple to correct. To my surprise, there was no starter motor on this genset. What i found out was that it utilized an "Exciter/Starter" type set up. Not sure of the specifics but i believe there are two sets of brushes hitting the armature. One set is starter brushes and they need to be in decent shape, not worn down, not burned up, and able to move freely in their guides under spring pressure.

Changing them out was fairly easy and afterwards, had no problems with starting.

[LVRVLUVR]

Originally Posted by Lifemember

Hope this will help

http://www.flightsystems.com/pdf/ona...oing-guide.pdf

A wiring diagram for the Onan generator start circuitry..Winnebago

Originally Posted by Mudfrog

We looked at that same floor plan back in 1993. Only it was on the Chevy chassis with the 350 engine, (the Ford part might be what makes it rare).. Anyway, it was a neat little set up but we ended up finding and buying our first class A instead, (it was priced right).

On the genset question. This may not be anything like yours but,,, our used 1977 Minnie Winnie had a generator that had intermittent starting problems after we first got it. Sometimes it would do nothing when either start button was pushed. I finally decided to see if i could figure out what was wrong and it turned out to be something fairly simple to correct. To my surprise, there was no starter motor on this genset. What i found out was that it utilized an "Exciter/Starter" type set up. Not sure of the specifics but i believe there are two sets of brushes hitting the armature. One set is starter brushes and they need to be in decent shape, not worn down, not burned up, and able to move freely in their guides under spring pressure.

Changing them out was fairly easy and afterwards, had no problems with starting.

thanks for the posts.... spent the day cleaning and painting... then got back to the gen...

probley at lot of work for nothing.... had to take the door off to get the gen out... got the cover off....jumped the solenoid.... gen cranked...

but... that only tells me the motors not froze up some thing simple is going on but.... who knows...

[JohnRR]

I'd say up you made some substantial headway with the problem.

[Lifemember]

Now you know it is in the wiring. Check the fuse with a meter for continuity one should be at the Gen some have 2. I would also check the ground wires and all connection for corrosion.

[LVRVLUVR]

Originally Posted by Lifemember

Now you know it is in the wiring. Check the fuse with a meter for continuity one should be at the Gen some have 2. I would also check the ground wires and all connection for corrosion.

actually... I don't know that...could still be the solenoid..... but I know it will crank if by passed.... hair puller

[LVRVLUVR]

well... I haven't had a 93 motorhome since 93.... I know from memory that the shore power cord has to be plugged in to the generator to get the stuff to work...... but does it have to be plugged in to get the gen to start,..???? I have the gen out on the ground...... maybe all I neede to do was plug it in.... maybe the start circuit goes off the shore power cord somehow..... antone know or have one of these.... is there a shore power/ gen power switch??? or is it auto???:co nfused:

[LVRVLUVR]

so question... does the shore power have to be plugged in for the gen to start on a 93 tioga with a 2.8??

[Lifemember]

Originally Posted by LVRVLUVR

well... I haven't had a 93 motorhome since 93.... I know from memory that the shore power cord has to be plugged in to the generator to get the stuff to work...... but does it have to be plugged in to get the gen to start,..???? I have the gen out on the ground...... maybe all I neede to do was plug it in.... maybe the start circuit goes off the shore power cord somehow..... antone know or have one of these.... is there a shore power/ gen power switch??? or is it auto???:co nfused:

I don't know enough about that model to tell you. It would need a contact switch located where you plug it in if it did. There would be nothing on the shore power side of the cord. Can you take a picture and get me the model number I will see what I can find.

[LVRVLUVR]

well... still need help.... there is a 6 pin plug at the back of the gen,,should any of those be hot???? and does anyone know which way the power goes?

[LVRVLUVR]

this gen looks new and I'll bet the problem has been there for a while..


one other thing, has anyone one ever checked the power to the fuses before here?