Skip to main content ↑ ↓
Topic: Boost Switch (Read 790 times) previous topic - next topic

Boost Switch

Went to start the coach this morning and I noticed the boost switch not lighting up. I tried the switch a couple of times and there was one time the light came on. I turned it off and it would not come on again. I carry a meter with me.
1.  What is the best procedure to troubleshoot?
2.  What is the best way to get to the bulb on the switch and to check the switch?  Hope I don't have to remove all of the panel screws.
3.  Where is the boost switch solenoid located on my '99?
4.  Is there a fuse for the solenoid?
Thanks in advance,
John M
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #1 –
John, on my 2000 295 the boost solenoid is on the plate below bed in engine area.
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: Boost Switch

Reply #2 –
It is probably only the bulb, use the starter without the boost and push the boost and see if the starter picks up speed. If it does it is just the bulb. I will be watching this thread as I have several of the bulbs not working on that panel.
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: Boost Switch

Reply #3 –
Quote from: John Haygarth –
John, on my 2000 295 the boost solenoid is on the plate below bed in engine area.
JohnH
Thanks John.  Will check it out when we stop.
John M
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #4 –
Quote from: craneman –
It is probably only the bulb, use the starter without the boost and push the boost and see if the starter picks up speed. If it does it is just the bulb. I will be watching this thread as I have several of the bulbs not working on that panel.
Craneman,
Can you get to the bulb without removing all of the screws?
Thanks,
John M
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #5 –
Quote from: John Haygarth –
John, on my 2000 295 the boost solenoid is on the plate below bed in engine area.
JohnH

Looking from the rear of the coach towards the front - on our 1999 it is on the right side (curb side) of this panel, towards the top.  about halfway between the size/shape of an upside down coffee cup and upside-down espresso cup - thicker gauge wires.  If you are having trouble ID-ing, post back here and I'll take a photo this evening.
James
w/ DW Erin, sons Gideon and Tobias, cats Oscar & Oliver
Fulltime 1999 U270 34' #5508

Re: Boost Switch

Reply #6 –
That's why I will be watching this thread. I have not gone there before. The bulbs were out when I bought the coach and other issues have been taken care of before I go there.
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: Boost Switch

Reply #7 –
John,

The boost solenoid on our rig is under the foot of the bed.  To determine if it's working and the light is just out have Carmen
activate the switch while you listen to hear the solenoid engage.

I'm not near our coach but you should be able to replace the rocker switch easily enough by accessing the back of it from under the dash?

Re: Boost Switch

Reply #8 –
Well, I was able to stop so we can have some lunch.  I tapped on the switch and the light would come off and on.  It is either the bulb or the contacts on the switch.  I'm thinking it's the bulb. How do you get to the bulb?  My boost switch is on the side console.
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #9 –
I'm following as well  since my boost bulb is out.
Mark Duckworth
2003 U320 4220
Build 6199, Motorcade 17971

Re: Boost Switch

Reply #10 –
 On mine you lift up the plate the switches are mounted in and at the back of each one in sort of the corner of switch body is a pull out plug that holds the bulb. I had replaced some of them but found that the bulb I was using is a fraction too long and causes the bulb to be pushed out when using switch. Simple replacement when you have new ones. So check the length and replace with same.
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: Boost Switch

Reply #11 –
Quote from: John Haygarth –
On mine you lift up the plate the switches are mounted in and at the back of each one in sort of the corner of switch body is a pull out plug that holds the bulb. I had replaced some of them but found that the bulb I was using is a fraction too long and causes the bulb to be pushed out when using switch. Simple replacement when you have new ones. So check the length and replace with same.
JohnH
John,
I was afraid of that. It is what it is.  As soon as we stop at our campsite in Auburn Alabama we will dive in a.a check it out.
Thanks, John M.
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #12 –
John,
With all of the wires hanging from the switches, it can be a bit challenging to work on the underside of that panel. Here is a picture of the way I supported it from above so as to keep from putting a strain on the wires.
Don
[/quote]
Quote from: John Morales –
Well, I was able to stop so we can have some lunch.  I tapped on the switch and the light would come off and on.  It is either the bulb or the contacts on the switch.  I'm thinking it's the bulb. How do you get to the bulb?  My boost switch is on the side console.
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson

Re: Boost Switch

Reply #13 –
Quote from: Don & Tys (AKA acousticart) –
John,
With all of the wires hanging from the switches, it can be a bit challenging to work on the underside of that panel. Here is a picture of the way I supported it from above so as to keep from putting a strain on the wires.
Don

Don,
For a 1999 your console is diferent from mine.  Mine is straight all the way across where yours goes up at an angle.

The sling idea is great.  There is room for only one person in that area.  We will do the same.
Thanks,
John M.
John & Carm Morales

"We travel not to go anywhere, but to just go.  We travel for travel's sake.  Our great desire is to move."

Re: Boost Switch

Reply #14 –
Quote
Here is a picture of the way I supported it from above so as to keep from putting a strain on the wires.

Like John, I am totally impressed by that sling! I just had mine apart to run some wire. Next time, that baby will be in a DonSling!
jor
93 225
95 300
97 270
99 320

Re: Boost Switch

Reply #15 –
Foretravel seems to have often worked on the trickle down upgrade principle... The 320's would get the benefits of the newest design changes, and a year or two later the U270's would inherit them as well.
Don
Quote from: John Morales –
Don,
For a 1999 your console is diferent from mine.  Mine is straight all the way across where yours goes up at an angle.

The sling idea is great.  There is room for only one person in that area.  We will do the same.
Thanks,
John M.
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson

Re: Boost Switch

Reply #16 –
Here is a quick check if your two battery banks have not been connected (boost switch off):  Look at the monitor and see if it is drawing amperage with boost switch off (if house batteries are charged, it should show zero draw).  Turn on the boost switch and see if has changed.  If it did, you know that the switch made a connection.  If both banks are equally charged, it might not show anything.
2000 U320 mid entry  #5688
2006 Jeep Liberty


USMCR retired
SDFD retired
FEMA US&R TF8

Re: Boost Switch

Reply #17 –
Like John H I found all of the #79 replacement bulbs I have found are a fraction too long to fit properly in the receptacle. If anyone has found a current source/ brand that works I would be forever grateful for the intel.

Steve
Steve & Sandy
2003 U320 4220 WCDS, build#6160
Motorcade #17794
USMC '67-'71

Re: Boost Switch

Reply #18 –
The last time I changed out some of the rocker switch bulbs, I used a Sylvania #2721.  It fit fine.  Same one recommended at Beamalarm:

Rocker Switch Bulb Replacement
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: Boost Switch

Reply #19 –
Some time ago I replaced some of those bulbs. Yup I removed all the screws. Wasnt to bad and found the bulbs at Walmart. Got lucky.
1995 U320 40', 2013 chevy sonic toad, my real love are corvettes have owned 30