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Old 12-20-2009, 01:20 PM   #1
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Question No power to fridge when towing

We recently changed tow vehicle from Chevy Trailblazer to Ford F-150. Lights and turn signals all work but refrigerator no longer works when towing (yes, I am switching to 12v power).
I looked in truck manual for fuse but did not see anything that looked to be likely culprit. The truck does have towing package. Any suggestions what to look for or how to test truck outlet?
PU is Coleman Bayside without a battery installed. I am planning to install a battery on the PU for a trip next summer but will need aux power from truck while towing.
Any help appreciated.

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Old 12-20-2009, 01:49 PM   #2
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Reb- Welcome to iRV2, best place on earth for all RV Q&A.

I had a 94 F-150 w/factory tow package. It had a 6 pin tow plug. As you can see from clicking on that link, the center pin was to provide 12V thru the plug. If that's what you have, check the center pin for 12V, and if its there, your problem is in the trailer. If not, trace the center wire back to find your fuse (might be an in-line fuse near the plug).

If you have the 6-pin, first thing I'd check is whether the truck & trailer both follow the color conventions shown on the linked diagram. If the conventions are not followed, you'll need to make your own diagram of wire colors & pin position functions. If you don't have 6-pin, you'll need to start defining what you do w/more info here to get better feedback. You can start w/year of truck & camper to get readers in the ball park of what we are diagnosing.

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Old 12-22-2009, 04:48 PM   #3
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Thanks for help

Thanks for the info. The website you referenced should give me what I need. I am pretty sure it has to do with the truck (06 F-150).

BTW Any recommendations for what kind of battery charger to get for deep cycle battery?
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Old 12-22-2009, 05:22 PM   #4
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A 2006 F-150 with a trailer tow package should have a 7-pin Pollack connector as it's the de facto standard today. If your connector looks like the one below, it should supply +12VDC on pin #4, but I believe the Ford uses a battery isolator relay to break the connection between the connector and battery when the ignition is off.

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electrical, refrigerator, wiring

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