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Topic: What are these 2 relays? (Read 525 times) previous topic - next topic

What are these 2 relays?

When I replaced my solenoids under the isolator, these are mounted on the same panel. Anyone know what they do?
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: What are these 2 relays?

Reply #1 –
The best place to find answers to questions like this is the appropriate wiring diagram (B-2126 Automotive Wiring).  If you do not have that wiring diagram for your coach, you are working at a distinct disadvantage.  Some, but not all, diagrams are available in the Forum library.  The one linked below may be correct for your coach.  You can see the two relays located adjacent to the battery isolator.  Check the routing and the wire number labels on the actual wires on your coach, to see if they correspond to the diagram.  If they do, then you have your answer.

https://www.foreforums.com/index.php?action=media;sa=media;in=3297
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: What are these 2 relays?

Reply #2 –
Quote from: Chuck & Jeannie –
  The one linked below may be correct for your coach.
https://www.foreforums.com/index.php?action=media;sa=media;in=3297

I am not sure if this one is any different, has different scale date of '96 compared to '02.  Drawing date is the same, anyone know what scale date means?

Adobe Acrobat
97 U295 40, Build #5040, 6C8.3 325 HP
Oregon Continuous Traveler
Samsung Residential #RF20HFENBSR,
Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
Extreme Full Body Pt w/hdlmps, new furn/floor, 4 down Lexus 2004 GX470 AWD curb weight 4,740 lbs
Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan

Re: What are these 2 relays?

Reply #3 –
I looks like they dated it in '02 when they removed the U280 reference to drawing. Scale date is insignificant since the "NTS" did not change.
Future Foretravel Owners
2019 Jeep Cherokee Trailhawk
Retired USAF, Retired DOD Civ's
FAA A&P, Indust. Eng., Acft Depot Lvl. Maint.
Larry and Becky Rountree

Re: What are these 2 relays?

Reply #4 –
Quote from: Jack Lewis –
I am not sure if this one is any different, has different scale date of '96 compared to '02.  Drawing date is the same, anyone know what scale date means?
Jack,

Yes your drawing is very different from the one I linked.  Yours is almost identical to the B-2126 I have for our '93 U280.  The "scale" date on mine is 11/10/92 and it supposedly only applies to U280 and U300.

I don't know what the dates on those drawings really mean.  I think the "CN" number is supposed to relate to the last build number covered by that drawing.  However, the CN number on my drawing is 4312 and yet I was told (in person) by James Triana that it was correct up through build 4389.  (Our coach is build 4359).  So who knows?

I am sure our library is missing some schematics.  There may be another one that slots between the one you linked and the one I linked.

I always encourage our members to check through the documents available in our library.  If you notice something missing and have a copy that could be uploaded, PLEASE take the time to add to our collection.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: What are these 2 relays?

Reply #5 –
I don't know what the dates on those drawings really mean.  I think the "CN" number is supposed to relate to the last build number covered by that drawing.  However, the CN number on my drawing is 4312 and yet I was told (in person) by James Triana that it was correct for our coach (build 4359).  So who knows?

The CN is probably abbreviated Control Number...?

Chuck, do you think it's possible that 4312 drawing was used on yours because it was simply the same and Build 4312 was the initial drawing usage?
Future Foretravel Owners
2019 Jeep Cherokee Trailhawk
Retired USAF, Retired DOD Civ's
FAA A&P, Indust. Eng., Acft Depot Lvl. Maint.
Larry and Becky Rountree

Re: What are these 2 relays?

Reply #6 –
Larry,

I don't feel like 4312 could be the beginning build number for that drawing, because that would mean it was only good for a very small number of coaches.  4389-4312=77 coaches.  Seems like it being the end build number would make more sense.

They obviously tried to update the schematics periodically as required.  Since running production changes were being made all the time, it may be that they would publish a new "revised" drawing with a certain build number printed on it, and then discover later on that it actually was still good for coaches being built after that date.

As I said...mystery to me.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: What are these 2 relays?

Reply #7 –
I'll look. I do have the B-2126 as FT sent it to me free. I got it when having dash light problems
Thanks
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: What are these 2 relays?

Reply #8 –
I believe one is for the A/C compressor and the other is for the condensor fan.
jor

93 225
95 300
97 270
99 320

Re: What are these 2 relays?

Reply #9 –
Thanks Jor. That's them. So both of them are AC parts which doesn't blow cold anyway. The previous owner spent over $3000 at 2 different shops and never did blow cold so I'll worry about it when everything else has bees fixed or updated.
Thank you
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: What are these 2 relays?

Reply #10 –
Quote from: Jack Lewis –
I am not sure if this one is any different, has different scale date of '96 compared to '02.

Adobe Acrobat

I received this pdf from Brad at Foretravel just a couple of weeks ago.  I just noticed someone wrote on the schematic "thru 5060", my 1997 FT coach number is 5040.
97 U295 40, Build #5040, 6C8.3 325 HP
Oregon Continuous Traveler
Samsung Residential #RF20HFENBSR,
Xantrex SW2012, (3)AGM8D Hse, (2)AGM Grp24 Eng, Victron BMV-712, 1800w Solar 4 LG & 2 Sunpower
Extreme Full Body Pt w/hdlmps, new furn/floor, 4 down Lexus 2004 GX470 AWD curb weight 4,740 lbs
Prev: 1990 Barth, 10L 300 2 yrs; 91&92 Monaco Signature, 10 yrs, 10L C 300 &  6C8.3 300; 1997 ForeT 6C8.3 325 since May 2017.  Employed by Guaranty RV 14+ yrs.  Former VW New Car Dlr/Service Dlr, Sales Mgr, Rv Sales, and Service Adviser from 1968-2017
"Don't criticize what you can't understand" Bob Dylan