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Old 07-09-2021, 07:43 PM   #1
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Red face Electrical Issue

2009 Thor Fourwinds-DC Voltage problems. Overhead lights do not work on DC, Monitor Panel has no display, Refer will not auto switch from electric to gas.
Lights and monitor will display on AC hookup. Refer will manually switch to gas while on AC.
Converter was replaced.
I am thinking a relay possibly but have no idea where it is hiding!!
I know there are much more knowledgeable folks out there then I.
Please help if you can.
I am wore out
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Old 07-09-2021, 07:59 PM   #2
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Welcome to iRV2.

It would appear from you description,that battery power is not reaching the RV fuse panel .
Within the first few feet of the power wire from the battery positive post , you should find a master system fuse or 12volt circuit breaker. Follow the wire from the battery carefully, if it goes through a wall get to the other side, and keep looking.

Do you have a voltmeter or a 12 volt test light?
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Old 07-09-2021, 08:04 PM   #3
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BTW. I need to ask before I travel though Deer Park again.

Has the DOH ,put up better signage about the new traffic circles, when entering from the North . I just about wrecked on my first trip through.
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Old 07-09-2021, 10:31 PM   #4
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Quote:
Originally Posted by Skip426 View Post
Welcome to iRV2.



It would appear from you description,that battery power is not reaching the RV fuse panel .

Within the first few feet of the power wire from the battery positive post , you should find a master system fuse or 12volt circuit breaker. Follow the wire from the battery carefully, if it goes through a wall get to the other side, and keep looking.



Do you have a voltmeter or a 12 volt test light?
Break out the voltmeter and start checking everything start right at the battery. I nust had the same trouble and it was the positive cable from the battery to said circuit breaker. It had a bad crimp on the battery end. It's a frustrating process but with a voltmeter you WILL find the problem.
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Old 07-09-2021, 10:40 PM   #5
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Did you check the Battery disconnect switch by the door. It needs to be on or in USE mode.
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Old 07-09-2021, 11:03 PM   #6
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Different RVs have different wire designs. Many/most have a master cut off switch the door. It maybe small relay switch to a bigger switch or just a main power switch. There may also be a large amperage fuse or breaker near this switch.

If these are not the problem I use a multimeter and start running the problem down. One approach, the simple one, is to start at the battery and proceed away towards the 12 volt fuse box. My other approach is start near the middle of the system to divide and conquer. If good in the middle then proceed farther away, if no power in the middle proceed closer to the battery. But this approach assumes you already know how your 12 volt system is designed and installed. For those folks with computer programming skills its like a hash.
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Old 07-13-2021, 04:48 PM   #7
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Hello to all that have replied. I do have a meter and there is voltage to the fuse panel. Still worming my way around to different places checking for current flow. Disconnect switch is in the on position and indicator light is lite. Have ohmed all the fuses and none are open. I will find the issue. Have the monitor paned out now and there is a 12V 40/60A relay that is suspect. All connections look ok but ??!
Oh do not think they have done anything with signs for the traffic circles but they did add a new one on Crawford. Thats three in town and two on 395.
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