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Old 10-09-2013, 09:27 AM   #1
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No Backup Lights '04 Cayman

We are new to motor-homing but have done a lot of RVing in 5th wheels. We recently purchased a 2004 Monaco Cayman 36 PRT with only 10,900 miles on it. It appears to have been stored inside for the majority of it's's in "as new" condition inside and out. It has a back-up camera that works fine, but I can't get the back-up lights to come on when I put the transmission in reverse. I have checked fuses and bulbs but found nothing wrong. I have been in the auto repair business for many years (retired now) but I am baffled by this one. Also the storage compartment that houses the water hook-ups has a 12v cargo heater. I have yet to find a switch that turns it on. Any help would be greatly appreciated.

Thanks, Rick
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Old 10-09-2013, 10:19 AM   #2
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I don't have any answers for you but

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Old 10-09-2013, 10:56 AM   #3
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Howdy and welcome aboard. I'm sure if you post your question over in the "Monaco Owners Forum" a little further down the main page you will get a quicker answer there. Enjoy your coach and your future travels.
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Old 10-09-2013, 07:02 PM   #4
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Hi Rick! Welcome to IRV2! It's great to have you join us!

As Steve said, this question really needs to be in the Monaco Owners forum, but the rules don't allow you to post it again over there. Maybe one of the Moderators will move it over for you. Enjoy the forum!

Good luck, happy trails, and God bless!
Joe & Annette
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Old 10-09-2013, 08:26 PM   #5
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Yes welcome, I don't know about the backup lights but the cargo heater is controlled by a switch above the door the say system heat on the bottom and the switch is oboe that. There is a light beside it that will come on when it is cold enough for the heater to activate, not sure what the temperature has to be for it to work.
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Old 10-09-2013, 08:26 PM   #6
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On mine the switch is labeled "system heat" for the heater in the water bay.
Mike & Gail
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Old 10-09-2013, 08:37 PM   #7
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Excuse my previous spelling , Monaco could possibly consider labeling this switch with something that indicates space heater or cargo bay heater or maybe explaining the purpose of the switches in their owners manual.
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Old 10-10-2013, 01:42 AM   #8
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Inside the front Ele -distro panel at C417 & c416 ( both are 6 pin plug in connector)the # 7 pins are jump together show to be the signal for back- up. goes to R9 relay. try changing out relay, also check Fuse F64.
Rich & Joan + Zach Parti Miniature Schnauzer
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Old 10-10-2013, 07:59 AM   #9
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On our '06 Dynasty, the back-up lights also function as docking lights. You might try turning your docking lights on, and see if they illuminate.

If they do light up as docking lights, then I would suspect the signal side of the back-up lights control circuit. I would check the switch or sender on the transmission that tells the circuit that it is in reverse. If it is functioning properly, then the wire from that sender to the relay that Rich is talking about would be suspect. I keep a long piece of twin-lead cable with alligator clips on each end, for troubleshooting. To test the sender, you could clip one to the lug on the sender, and bring the other end out from under the coach to where you could safely put a meter on it to see if it is functioning when you put the coach in reverse. I'm sorry, but I don't know where that sender would be located.

If they do not, then perhaps it isn't designed to operate the same as ours does, in which case I've been of no help.
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Old 10-10-2013, 11:01 AM   #10
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Thank you for all the timely help & tips we got from you folks. I can now tackle the problem with some insight. I will keep you posted about my progress.
Thanks again, Rick
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Old 10-13-2013, 09:10 AM   #11
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I checked the fuses in the electrical panel and all seemed OK. I was'nt too happy with the original B/U lites, so I went and bought some REAL ones(4") cost with circuit breaker, switch ,etc, under $20. I hooked everything up and a couple of hours later "I saw the light!"

Thanks again,Rick
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Old 10-14-2013, 01:45 PM   #12
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H2O Heater Automatic?

I just bought a 2003 Cayman and was told that the H20 Compartment Heater is automatic. The tech told me that it comes on once the temperature falls below a certain temp. Maybe he fooled me. Will go look in my owners manual and get back.
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