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Old 07-21-2012, 07:41 PM   #1
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2005 Meridian 34H Basement Lights

Hi All 12Vdc lighting experts;
I made an original post nearly one year ago with the problem of none of the basement lights working. To summarize, I checked the following:
light bulbs, compartment door switches, ground paths, and the compartment light switch on the switch panel located in the RV entry. All were, and still are, good. But during the past year the problem did not fix itself. I have consulted the wiring diagrams with no success.
The voltage at the compartment light switch located in the RV entry is 4.5vdc and it should be 12vdc. Where is the missing 7.5 volts?
The wire is stamped with the number 1498984-01<D> WC2. How does the wire travel from the 12VDC circuit breaker panel located below the refirgerator to this switch. This number is not found at the circuit breaker panel. THis is not a major issue but it is bugging me.
My RV is a 2005 Itasca Meridian 34H, serial no. 70P70F244018.
I would appreciate any assistance in resolving this issue.
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Old 07-21-2012, 08:46 PM   #2
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Just by chance have applied 12v to the side that runs to the lights to see if they will work? Where does it get power from is it tied in with something else or on it's own circuit?
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Old 07-21-2012, 10:10 PM   #3
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According to the Body, 12 Volt Wiring Diagram for your coach, the yellow wire labeled WC is the power lead for the compartment lamps and the white wire labeled WE is the ground.

Looking on page 3 of the pdf [S1|F2], at location A-9 and A-10 you can see compartment lamp switches and you can follow WC over to location A-13 where it enters a 12-pin plug on pin 3. This plug is physically located in the base of the refrigerator cabinet.

The mating connector for this plug can be found on page 6 of the pdf [S2|F3], at location A-19. From here you can follow WC to the left onto page 8 of the pdf [S2|F5] at location D-33 where it connects to the EXTERIOR SERVICE LAMP SWITCH on pin 2. Following WC to the right takes you to page 4 of the pdf [Sheet 2] at position A-4 where it enters the 12V BREAKER PANEL and connects to the leftmost breaker in the top row (note that this is the back of the panel, so it will be on the upper right when viewed from the front).

If you look in the Body, 12 Volt Wiring Installation on page 5 of the pdf [Sheet 4] you can see the breaker labeled COMPT LAMPS in the upper right corner of the panel.
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Old 07-21-2012, 10:20 PM   #4
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Btw, Winnebago's Wiring Identification Guide is very helpful in identifying what a given wire is used for.
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Old 07-22-2012, 08:58 PM   #5
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Thank you to cbeirl for the wiring diagram information. I will research this next week.
Also, for nightriderrv, I have connected 12vdc to the compartment light switch an verified the lights work.
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Old 07-22-2012, 09:38 PM   #6
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I have had some electrical gremlins in my coach ... power being corrupted ... the fix has been to run a new wire to replace the corrupted wire ... it is too difficult to physically trace the wire because they are in bundles as they weave there way throughout the coach.
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