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Topic: Question and an FYI (DD6V92 operating temperature) (Read 796 times) previous topic - next topic

Question and an FYI (DD6V92 operating temperature)

I have replaced the water pump (DD6V92) fan switch, had all the fluid flushed and the engine seemed to run hotter than it should 197-205 sometimes 210.  Since the dash air doesn't work I always had just the AC fan on and the overhead fan on. Well come to find out when these fans are on they add 10-15 degrees to the temp gauge.  Does anyone know why this is happening?

Thanks,

Woodie


Modified topic title to be more descriptive - Michelle
Woodie Lee Jr
93 U300. 40'
6V92ta

Re: Question and an FYI

Reply #1 –
Quote from: leejrfla –
I have replaced the water pump (DD6V92) fan switch, had all the fluid flushed and the engine seemed to run hotter than it should 197-205 sometimes 210.  Since the dash air doesn't work I always had just the AC fan on and the overhead fan on. Well come to find out when these fans are on they add 10-15 degrees to the temp gauge.  Does anyone know why this is happening?

Thanks,

Woodie

I would guess a voltage issue. My '81 would change the speedometer when I turned on the headlights.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Question and an FYI

Reply #2 –
This exact temp change happens on my 1991 6V92 temp gauge. Headlights affect it some, but the dash fan raises it 10 degrees or more as you have noted. This is due to a voltage drop in the dash wiring. I have learned to make the correction in my head when I read the temp.
Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Question and an FYI

Reply #3 –
Quote from: prfleming –
This exact temp change happens on my 1991 6V92 temp gauge. Headlights affect it some, but the dash fan raises it 10 degrees or more as you have noted. This is due to a voltage drop in the dash wiring. I have learned to make the correction in my head when I read the temp.
I remember in the 60's we had voltage stabilizers on the back of some gauges especially fuel on the old Fords I had.

Hans

Hans & Marjet
1995 U300 "Ben" (#4719)
3176B Cat,4060HD,Jake
SKP#139131
Motorcade#17579
2006 Honda Element (towed)

Re: Question and an FYI

Reply #4 –
Just a note on gauges. I have been reading a lot about VDO ones as my water temp one is either gone or sender gone. The one thing I noticed mentioned with strong wording is that they should all have a good minimum 14ga ground wire to a single good frame connection. FT has not done this so will someday (after I figure out my gauge) do this for all of them.
It sounds like it does make a difference on the reading.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Question and an FYI (DD6V92 operating temperature)

Reply #5 –
I have also noticed that the dash a/c fan will make my 95 u-240 3116 water temp raise by 5-10 deg.  Bad ground could be the problem, but I have not found the reason.

Pat
Pat/Blue Angel
1995 U240 36ft
MC# 16511
Build# 4653

Re: Question and an FYI (DD6V92 operating temperature)

Reply #6 –
On my to-do-list is to run a new 4/0 ground cable from the battery bay ground to the dash ground post. I think the OEM braided ground wire used by Foretravel is inadequate. This will be better than using the frame for ground, on a 25 year old coach.
Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Question and an FYI (DD6V92 operating temperature)

Reply #7 –
...also when driving in the pouring rain the temperature gauge will suddenly go all the way to the top of the scale, because the rain water has grounded out the temperature sensor ...so clean up the sensor and seal it with Liquid Tape ...and your gauges will go wonky if your ignition solenoid is about to fail
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)

Re: Question and an FYI (DD6V92 operating temperature)

Reply #8 –
Not sure when Foretravel changed but the 80's and it seems some early 90's coaches had the frame as the ground path primarily.

My 97 has a large collection of green wires to a wire mesh grounding bar under the dash.

My guru buddy removed the wires from my dash gauges and crimped the contact tabs tighter then reinstalled them.

Volt gauge flucuations went away.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Question and an FYI (DD6V92 operating temperature)

Reply #9 –
Quote from: RRadio –
...and your gauges will go wonky if your ignition solenoid is about to fail
This got me thinking. My ignition solenoid is original and 25 years old as far as I know.

I went over to the coach today with a voltmeter and took some readings across the ignition solenoid main contacts with the ignition switch turned to the "on" position (one click) - and then switched the heater fan on and off - this is what changes my temp gauge reading by 10-15 degrees:

- Heater fan off - 0.15 volt drop across solenoid
- Heater fan full on - 0.5 volt drop across solenoid

Not Good!!

I have ordered this solenoid on Amazon with silver tungsten carbide contacts, will be replacing the solenoid before the next trip. I'll measure and post voltage drops with the new solenoid for comparison.

Cole Hersee 200 amp continuous duty solenoid

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Question and an FYI (DD6V92 operating temperature)

Reply #10 –
"I remember in the 60's we had voltage stabilizers on the back of some gauges especially fuel on the old...,

Impressive, you were there AND you can remember it in detail? 😜 ✌
Alan & Gerri Ortiz
1996 U295 36 ft.
"Rocinante"
Hartwell, Georgia
1999 Subaru Forester
Build No. 4957 Motorcader 17399

Re: Question and an FYI (DD6V92 operating temperature)

Reply #11 –
My ignition solenoid was the electrical problem on my coach several years ago. At one point it only allowed about 7 or 8 volts across causing the electronic engine computer to shut down. The contact surfaces were carbonized,  replacing this solenoid that is under the dash behind the speedometer makes a big difference in all 12 volt electrical accessories.  ^.^d
The selected media item is not currently available.
Gerry & Brenda
CHARLOTTE HARBOR, FL
1994 Grand Villa - # 4466
U300 Unihome - 6V92 Detroit
4 speed Allison - Jake Brake

Re: Question and an FYI (DD6V92 operating temperature)

Reply #12 –
If you ever find yourself stranded due to a bad ignition solenoid you can swap it with the boost solenoid behind the panel over the battery box. On my coach they're the exact same solenoid. Also notice that the little black box Bosch relays are all the same and there's at least one spare under the dashboard that you can use for a field repair if it leaves you stranded.
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)

Re: Question and an FYI (DD6V92 operating temperature)

Reply #13 –
Quote from: Alan & Gerri Ortiz –
"I remember in the 60's we had voltage stabilizers on the back of some gauges especially fuel on the old...,

Impressive, you were there AND you can remember it in detail? 😜 ✌

I did have some off days during those times....and its coming back now 8)  8)
Hans & Marjet
1995 U300 "Ben" (#4719)
3176B Cat,4060HD,Jake
SKP#139131
Motorcade#17579
2006 Honda Element (towed)

Re: Question and an FYI (DD6V92 operating temperature)

Reply #14 –
Peter, I am really surprised that with all your knowledge and expertise electrically that you have not taken that ign' solenoid apart like I have done and clean it up. That is all that is needed but I do understand that $37 is a small price to pay for a good new one. Once you do install the new one then take it apart to see and file contacts faces and "washer"
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Question and an FYI (DD6V92 operating temperature)

Reply #15 –
John, yes, I did repair my boost solenoid as you have described and it has worked well for 4 years. I wanted the new silver tungsten contacts for minimum resistance, to see if that solves my engine temp gauge reading high. I do plan to repair this one and keep as a spare.
Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Question and an FYI (DD6V92 operating temperature)

Reply #16 –
You probably already know this, but don't use an emery board or any other type of sandpaper to clean electrical contacts because the sand will melt into glass, which is an insulator. This is true on high voltage AC contacts also. It's best to use one of those little ignition point files if you can find one... Unfortunately I can't find mine at the moment because it's so small it disappeared on me! haha
Scott Cook
1991 U300 36' 6V92TA
Old Town Penobscot 16
1984 Honda VF1100C (V65 Magna)

Re: Question and an FYI (DD6V92 operating temperature)

Reply #17 –
Quote from: RRadio –
You probably already know this, but don't use an emery board or any other type of sandpaper to clean electrical contacts because the sand will melt into glass, which is an insulator. This is true on high voltage AC contacts also. It's best to use one of those little ignition point files if you can find one... Unfortunately I can't find mine at the moment because it's so small it disappeared on me! haha

Metal fingernail file can be used in an emergency.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean
 

Re: Question and an FYI (DD6V92 operating temperature)

Reply #18 –
Quote from: craneman –
Metal fingernail file can be used in an emergency.

It dates me, but a match book striker works well.
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
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