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Topic: Trouble shooting ds power mirrors (Read 804 times) previous topic - next topic

Trouble shooting ds power mirrors

When we bought the coach the driver side power mirrors did not work. The switch felt really worn out I assumed the switch was bad. I ordered a new one from ramco  installed it problem solved. Not so fast the light in switch comes on so it must be getting power.  But it still doesn't work . I figured there must be a fuse for it, but I can not figure out where. Not really sure how to figure it out.
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #1 –
On your model year coach more likely it is protected by a auto-reset circuit breaker (they CAN fail).  Look on the big circuit breaker panel hidden behind the removable panel directly in front of the copilot seat.

Look on your 12V Wiring Diagram (B-2197 ? not sure of the number for U270) to ID the mirror breaker.

Or, the wiring going from the switch to the mirror could be damaged or broken.

Or, the motor in the mirror could be bad.

Good luck with your troubleshooting!

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: Trouble shooting ds power mirrors

Reply #2 –
Thanks I will check the auto reset tomorrow and go from there.
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #3 –
Quote from: Michelle Long –
the light in switch comes on so it must be getting power.
Since light in mirror switch comes on, CB is probably fine.  I doubt there is a separate CB for each mirror.

I'm betting on bad wiring to mirror or broken mirror motor.  Just an armchair guess.
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: Trouble shooting ds power mirrors

Reply #4 –
Upper and lower mirrors operate independently. Will either move?
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #5 –
No neither one will move. I took the panel off that the switches are mounted on and looked down in there followed the wire to where it goes out to the mirror arm wire didn't look damaged in any way. Then I took the mirror head off the arm. The wire looked ok there. I then looked between the glass and the mirror head to see if any wire looked loose or anything abnormal didn't see anything wrong. I do not know how to get glass out to get a good look at it, or check the motors. I think that is where I need to check for power as I operate the switch.
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #6 –
It is most likely a wiring fault.  You can have a broken wire that does not look broken or a connector that is bad.  You need to verify you have power at the switch and then at the motors. If there is power at one end and not the other then start looking.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Trouble shooting ds power mirrors

Reply #7 –
Yes that is where my thinking was taking me.  I am not great at tracking down electrical issues. I am thinking after I verify I have power at the switch. I need to check for power at the motors when operating the switch. Do you know how to get the mirror off the motor so I can access the connections?
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #8 –
Quote from: Michelle Long –
Do you know how to get the mirror off the motor so I can access the connections?
disassembly of Ramco mirror?


https://www.youtube.com/watch?v=5MKtjgnCrw4


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: Trouble shooting ds power mirrors

Reply #9 –
I rewired mine. It is a nightmare. Your glass is on with velcro. Mine was glued on. Since both operate with seperate motors I would think it is a ground issue. On Ramco site there is a wiring diagram.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #10 –
Mirror Parts – Ramco Engineering, Inc

Mirror Support

https://af62cd51-b52f-4acf-9b22-deb6a072bf1c.filesusr.com/ugd/9e24ac_2397b1885b3b4069999b812df4028ad7.pdf

I don't seem to find a drawing specifically for Ramco Mirrors but marked up this one.  Sort of like a treasure hunt.

Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Trouble shooting ds power mirrors

Reply #11 –
Thank you all very much huge help.  I will check switch first. The ground is not something I thought of. I also reserected a 6 yr old thread by responding on that accidentally.
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #12 –
Quote from: Michelle Long –
I also reserected a 6 yr old thread by responding on that accidentally.
That's called a ZOMBIE thread.  Happens around here all the time.  That's the great thing about this Forum - we get to benefit from hard-earned knowledge posted many years ago by members with the exact same problem.  No need to reinvent the wheel.

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: Trouble shooting ds power mirrors

Reply #13 –
This will help.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #14 –
Quote from: Twig –
This will help.
Twig is that diagram year-specific or consistent across most of our coaches?
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.

Re: Trouble shooting ds power mirrors

Reply #15 –
Quote from: Elliott –
Twig is that diagram year-specific or consistent across most of our coaches?
Specific for that mirror with square control knob. If you have a different mirror and knob a call to Ramco will get you that diagram.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #16 –
Quote from: Elliott –
Twig is that diagram year-specific or consistent across most of our coaches?
If you have 2 separate switches a different animal.
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: Trouble shooting ds power mirrors

Reply #17 –
Quote from: craneman –
If you have 2 separate switches a different animal.
What do you mean 2 separate switches? I have 1 switch for the left mirror and 1 for the right. 2 separate switches.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #18 –
The schematic shows both mirrors coming out of the same switch. At least it appears that way.
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: Trouble shooting ds power mirrors

Reply #19 –
I see what you mean. I may have erroneously put up the wrong diagram. I'll be back.

Nope. Correct diagram except instead of left and right mirror it is the upper and lower mirror. There are nine wires going to each side from each square knob and each wire is color coded a different color that the diagram does not show, so you can't mix them up. That was my nightmare. Thanks for pointing that out.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #20 –
That was the schematic for my Monaco, one knob for both mirrors by rotating 1/4 turn. The schematic posted says for manual or stationary convex mirrors.
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: Trouble shooting ds power mirrors

Reply #21 –
Quote from: craneman –
That was the schematic for my Monaco, one knob for both mirrors by rotating 1/4 turn. The schematic posted says for manual or stationary convex mirrors.
In any case, that's the schematic for our mirrors except the wiring to the upper and lower motors are color coded the same from the switch to the motors. So "stationary" or "manual" must mean that the case does not move, but the mirrors do.
1994 U280, Build 4490
Deming, NM.

Re: Trouble shooting ds power mirrors

Reply #22 –
Reply # 2 right here in the forum for the power convex.

Ramco Mirror Wiring Colors
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: Trouble shooting ds power mirrors

Reply #23 –
I dug through the big box of paper (the owners manuals and records) and found the color coded wiring diagram for the mirrors. Checked the function of the switch with 12 volt test light I think everything is in order there.  I took the flat glass off the mirror to check that side. I am still having trouble getting in there due to the aluminum plate the mirror attaches to is almost as big. There is a plug behind it, but I am scared I won't be able to plug it back in. I got side tracked as I had a glass co fix a rock chip in the windshield. Going to get back at it try to figure this out
Tom and Michelle 2004 U270 36WTFS

Re: Trouble shooting ds power mirrors

Reply #24 –
There are medical tools like forceps also some needle nose pliers long tweezers = 6".
That might help maneuver the plugs behind the mirrors if not removed. The utube video gives a good showing of removal of glass. Heavy weight floss or thin wire may work.
1999 U270 40 #5518
USN. USPS.