Home » Public Forums » GMCnet » [GMCnet] Never assume anything
| [GMCnet] Never assume anything [message #269789] |
Fri, 16 January 2015 15:14  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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The new board came today. I installed it, pressed the start switch and the Onan sprang to life. As soon as it warmed up a minute or so it ran evenly, put out 125vac with no load and 115VAC under load. So, the combination of the module plus a new board and it sounds better and smoother than it ever has. Good use of $250 or so. The new board with the pig tail soldered on looks like a much higher quality piece that the stock board with all those push on connectors ever did. Thanks to all who offered advice and suggestions. My suggestion is to make sure the polarity on the coil is correct before hooking up the module!
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
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Jerry & Sharon Work
78 Royale
Kerby, OR
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| Re: [GMCnet] Never assume anything [message #269837 is a reply to message #269789] |
Sat, 17 January 2015 04:34  |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Jerry,
Happy to hear the good report on the board and and electronic ignition. I too have been considering a new board and have not been able to decide on the soldered pig tail wire version or the old push on pin style. I like how clean and simple the pig tail version would fit under the cover and route the wires. I'm just not sure how you would troubleshoot and install jumper wires from pin to pin. Maybe the idea is that with a new board you would not need to troubleshoot.
Do others have additional thoughts on one type of board vs the other?
I think I am leaning toward the soldered connections and pig tail wires like Jerry.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Never assume anything [message #269977 is a reply to message #269969] |
Mon, 19 January 2015 07:54 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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90 degree bend correct tabs are on the wall of generic parts at our local Advance Auto. I suspect these are also available at Wet Marine, or other boating supply houses.
Purchase a quality crimping tool. The simple scissors type crimps may not survive. Even HF has Better quality crimper available.
If you have one of the neat little labelers, aka Ken H., label the ends and save some wondering which went where.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Never assume anything [message #270028 is a reply to message #269946] |
Mon, 19 January 2015 20:37 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Rob,
My WiFi connection here at Lazy Days isn't good enough to check which flag
connectors you're looking at, but they should NOT be the 1/4'" ones; the
3/16" size are required. They're usually a lot harder to find, but ARE
available. Straight fast-on's will not clear the board cover.
Ken H.
On Sun, Jan 18, 2015 at 7:10 PM, Robert Mueller
wrote:
> Mac,
>
> McMaster Carr has them.
>
> http://www.mcmaster.com/#7820k11/=vixrep
>
> I'm not sure that's the correct size for the tab or wire.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Never assume anything [message #270041 is a reply to message #270028] |
Tue, 20 January 2015 01:40 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
Dumb luck strikes again!
The link I published for the McMaster Carr 90° fully insulated connectors was 0.187 inches (3/16") and are red in color for wire
gauge 22-18 AWG.
http://www.mcmaster.com/#7820k11/=vixrep
Heres 3/16" blue colored ones for 16-14 AWG
http://www.mcmaster.com/#7820k13/=vjm3au
Regards,
Rob M.
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: Ken Henderson
Rob,
My WiFi connection here at Lazy Days isn't good enough to check which flag
connectors you're looking at, but they should NOT be the 1/4'" ones; the
3/16" size are required. They're usually a lot harder to find, but ARE
available. Straight fast-on's will not clear the board cover.
Ken H.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Never assume anything [message #270042 is a reply to message #269789] |
Tue, 20 January 2015 03:51 |
Steve
Messages: 506
Registered: September 2013
Location: East Greenville, Pa
Karma: 1
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Senior Member |
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Ok, it's time for me to redo the wiring to the board. A prior owner or service tech wired the board with "straight" connectors as opposed to the 90 degree or flag style connectors. It is nearly impossible to route the wires or get the cover over the board without damaging a connection. I have been running without the cover because it was too difficult to get in place.
1978 GMC Royal
Eastern Pennslyvania
1968 Chevrolet C20 396 Camper Special
1969 Chevrolet C20 Camper Special
1985 Buick Electra Park Avenue
1992 Camaro 25th Anniversary Heretage Edition Black
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| Re: [GMCnet] Never assume anything [message #270043 is a reply to message #270042] |
Tue, 20 January 2015 04:10 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Be real careful when doing that. Those pins soldered on the board are not that strong. It is easy to crack the solder joints and loosen the pins where the pins mount to the board. It is a really poor design in my opinion.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Never assume anything [message #271166 is a reply to message #270056] |
Wed, 04 February 2015 04:50 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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This comment is a bit tardy since I was without wifi for a couple of weeks.
A few years back, before I abandoned the Onan, I rewired the engine side
completely. I was surprised at how much excess wire is used in the OEM
harness. By eliminating the 12-pin connector and wiring to match the
wiring diagram, I probably eliminated 2/3 of the total wire length. Most
of the original wires run strange routes and are far longer than required;
most of that due to production considerations, such as the 12-pin
connector. With the new color coded wires, it was much easier for me to
understand the system and troubleshoot it. I'd forgotten until now that
these photos exist:
http://www.gmcmhphotos.com/photos/4kw-onan-air-filter-26amp-3b-new-wiring/p4063.html
or
http://goo.gl/4e2Z7i
The colors I used are those on this revised wiring diagram (which is
equally applicable to 6kW):
http://www.gmcmhphotos.com/photos/data/5813/KH_Onan_Wiring1.pdf
JWID,
Ken H.
On Tue, Jan 20, 2015 at 11:39 AM, gene Fisher wrote:
> Good reason to get a new board with wires
>
>
> On Tuesday, January 20, 2015, Ken Burton wrote:
>
>> Be real careful when doing that. Those pins soldered on the board are
> not
>> that strong. It is easy to crack the solder joints and loosen the pins
>> where the pins mount to the board. It is a really poor design in my
>> opinion.
>> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Never assume anything [message #271203 is a reply to message #269789] |
Wed, 04 February 2015 17:05 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Comments - You can eliminate either the 12 pin Molex <tm> connector or the push -on right angle connectors, but not both. Unless you never wish to remove the board from the set. The most reliable way is to eliminate the push-on connectors on the board itself and retain the Molex. Please note, the pins and sockets in the Molex are >not< either of the two standard sizes Molex produces. I did some work on Fred Hudspeth's board, and was lucky enough to find some replacement pins which fit at Skycrafters in Orlando. Do I do this again, I'll simply reuse the existing pin or socket, and solder and heatshrink an extension as required. The pins and sockets >will< come out of the block individually using the regular Molex tool. Please use this tool or its generic substitute, otherwise you will almost certainly FUBAR a very hard to find part.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
[Updated on: Wed, 04 February 2015 17:06] Report message to a moderator |
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