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Old 10-04-2014, 05:46 PM   #1
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Wiring Trouble

Hello, glad to find this group. Found it searching for an answer to my wiring problem. Haven't found the answer, but glad to find the forum!
Recently I bought a 1984 Wilderness 23' travel trailer. ( I know there's lots of lingo, but I don't know it yet). Now as we prepare for our first trip, the lights aren't working right. The taillights are brighter than the brake lights and you can barely see them (brake lights). Checked ground and fuses. how do I tell if the contact plates are reversed. Thanks again for the forum
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Old 10-04-2014, 06:15 PM   #2
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FWIW - trailer sounds like it is working. Do you have a combiner for the tow vehicle lights? If so that sounds like it is the problem. Voltmeter time.
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Old 10-04-2014, 08:38 PM   #3
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Maybe some help. https://www.google.com/search?q=7+pl...3B300%3B339And welcome aboard
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Old 10-04-2014, 09:24 PM   #4
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We had an older Travelaire 5'er for years. Just about yearly I had to pull the lenses off all the lights and tighten the ground screws (I would usually do all the screws in the lamp). The manufacture used the outside aluminum sheeting as the ground wire. Regularly I would also add toothpicks to the screw holes to tighten the ground or add new screws. Don't be scared to pull out the bulbs and clean the contacts and retention the contacts as corrosion often developed there.
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Old 10-05-2014, 10:54 AM   #5
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Dielectric compound at base of bulbs. Also all 7 and 4 prong connectors. Just about any electrical connector on a RV or TV that is exposed to the elements.
My 2c
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Old 10-05-2014, 07:35 PM   #6
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Just to add, sometimes owners will swap wiring in the connectors to deter theft, you may want to check color codes & connections in the plug. Possibility you may a mismatch.
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Old 10-06-2014, 12:20 PM   #7
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wiring trouble

well thanks for all the ideas. We ran out of time to go through everything so we just ran a new set of wires temporarily under the trailer until we get back (time limit on this trip) so we're set for now. We'll just go through every connection and check every contact till we find it. thanks again!
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Old 10-07-2014, 11:11 AM   #8
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You have the bulb in backwards. Try turning the bulbs 180 degrees in the socket and reinsert.
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Old 10-07-2014, 11:18 AM   #9
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Wiring Trouble

Quote:
Originally Posted by mgscott4 View Post
You have the bulb in backwards. Try turning the bulbs 180 degrees in the socket and reinsert.
I had the same taillight problem and turning the bulb around was the solution. It seems the two elements in some dual element bulbs aren't equal. The bright element is for the brake light and the dimmer element is for the taillight. You'll notice the base of the bulb has two pins, one for each element, inside a ground sleeve. As mgscott4 said, try turning the bulb around. Hope that works for you!
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Old 10-07-2014, 08:12 PM   #10
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Quote:
Originally Posted by Falcon190 View Post
I had the same taillight problem and turning the bulb around was the solution. It seems the two elements in some dual element bulbs aren't equal. The bright element is for the brake light and the dimmer element is for the taillight. You'll notice the base of the bulb has two pins, one for each element, inside a ground sleeve. As mgscott4 said, try turning the bulb around. Hope that works for you!
If your talking about the 1157/2057 round base bulb yes the pins are at different locations but you would have to press and turn one pretty hard to get it to go in the wrong way which i dont think will happen.And if that is what happened go to ETrailer.com buy a tail light and tail light w/license plate light ( they're cheap) and replace both of them.
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Old 10-07-2014, 08:21 PM   #11
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I had both 1157 and 1156 (If I remember correctly) in my spare collection. The MH assembly needed 1157...but one of my cars needed 1156. Looked almost the same, but the lugs on the bulb are opposite.
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Old 10-07-2014, 08:37 PM   #12
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I had both 1157 and 1156 (If I remember correctly) in my spare collection. The MH assembly needed 1157...but one of my cars needed 1156. Looked almost the same, but the lugs on the bulb are opposite.
The 1156 (is a single filament bulb ) for your backup light or any single light application and the pin's are across from each other.
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Old 10-08-2014, 08:53 AM   #13
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1156 is single contact, single filiment back up lamp, SOME cars also use these for other things.

1157 is double/double used for Stop/Turn/Tail (rear) and parking (Front) lamps. this lamp has two elements, one high power, one low power, and two contacts on the bottom. IF you force it into the socket 180 degrees out of position of where it is supposed to be (Lugs are offset on sides to discourage this) they will be dim on stop and bright on tail.

IF you reverse the connections to the socket.. Same effect.
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Old 10-08-2014, 01:38 PM   #14
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I must have forgotten the correct number...recall of six or so years ago not as good as I thought!


Correction: 1154...not 1156...excuse me!!!
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