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Old 08-25-2011, 05:34 PM   #1
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Wire for Diesel Block Heater

I recently installed a 1000 watt block heater in my Cat 3126 engine and would like to have something more than just the usual 120V AC plug with an extension cord to a campground or residential receptacle.
Has anyone done a wiring mod for their gas or diesel block heater, to make it more convenient or automatic to operate?
Perhaps incorporating a relay, a timer, an inside switch, and/or pilot light?

'96 Safari Sahara, 250hp Cat

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Old 08-25-2011, 06:06 PM   #2
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On my tow truck years ago I had a timer on mine to save me money. I usually got calls from 7Pm to 4AM so the timer was set for 6Pm to 4Am.
Just a regular $5 houshold timer will work fine.

(RVM#26) THE U-RV 94 F-700/24 foot U-haul box home built RV
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Old 08-25-2011, 06:11 PM   #3
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The way Winnie wired mine was to simply install a switched 120v outlet in the electrical bay controlled by a switch labeled "engine heater" on the inside of the rig.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
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Old 08-25-2011, 06:26 PM   #4
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Mine is plugged to the coach power system and there is a switch in the bedroom for it. The switch actually controls an outlet near the engine and the block heater is plugged into that. That way I can still plug the heater into an external source if I want. It also gives me a switched outlet that I can use to power outside lights or whatever.
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
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Old 08-25-2011, 06:47 PM   #5
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Mine is at the foot of the bed, lights up when turned on. Our dog kept turning it on and I installed a screen door pull over it like a mini bumper so to stop this from happening. To track down the guilty party, I put some tape with sticky side out nexe to the switch. Caught several clumps of fur! Also congrats on 8,000 posts Gary RVRoamer!
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