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Old 11-25-2013, 07:33 AM   #1
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1986 34' Limited
1966 24' Tradewind
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Exterior Lights Mystery Component - Help Identify

I dropped the belly pan on my 66 Trade Wind to repair some floor rot. I knew about the "access panel" in the front curb side that give access to the 7 pin wiring harness. It does not appear this access panel was ever disturbed on my trailer.

There is a rather stout rectangular box rivited to the belly pan access panel that has three of the wire harness wires connected to it. The box is roughly 1" by 1/2" and shiny. I wonder if it is some type of ground connection.

Can you "sparkys" identify what the function of this componet is?

David
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Old 11-25-2013, 08:08 AM   #2
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Looks like a relay. What does the blue wire feed?

Aaron
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Old 11-25-2013, 08:26 AM   #3
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I believe that's a DC circuit breaker, but don't know what circuit. The blue colored wire is "normally" electric brakes.
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Old 11-25-2013, 08:52 AM   #4
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Looks like a self resetting circuit breaker. if you clean it up you may see a 20 or 30 amp rating on it.

Not sure but some of the older trailers had an indicator light that could be seen in the mirror by the driver when the brakes were applied. If so the second wire on the blue terminal may be that light.

Considering the age I would replace it.
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Old 11-25-2013, 09:38 AM   #5
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1966 24' Tradewind
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Thanks guys,

It may very well be a circuit breaker. It did come apart when the belly pan dropped. The rivet case stayed with the belly pan and the wire connectors stayed with the wiring harness. I can see some silicone was holding the two components together. It will need replaced with an equilivent.

My 66 Trade Wind owners manual shows a diagram of the "12v" system from the tow vehicle to the trailer. It shows the blue wire as the "charge wire" from the center pin of the plug to a 25v circuit breaker, then to a 40 amp fuse, and then to the positive terminal of the trailer battery.

The manual says a yellow wire is trailer brakes. Further, it says
Red - left turn and stop
Green - running light
Black - back up light
White - ground
Brown - right turn and stop

My trailer is a land yacht, not an international. I don't have an "brakes on" indicator light. Maybe the international trim level did.

I'll take a closer look at it today. Maybe I'll see the amp rating.

David
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Old 11-25-2013, 09:46 AM   #6
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It appears to be a self reseting circuit breaker, most likely in the charge line. I would guess that one of the lines goes to the jack motor, one to the battery, and the third to the Tow Vehicle charge circuit.
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