Troubleshooting lights (my favorite: NOT.) - Page 2 - Fiberglass RV


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Old 07-11-2012, 11:43 AM   #15
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Quote:
Originally Posted by Bobbie Mayer View Post
See if this works.
Something is VERY screwed up from Ipad app to here. I again posted the red cover and got a totally unrelated photo this time.
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Old 07-11-2012, 01:32 PM   #16
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This morning, neither the new bulb nor the old worked at all. With or without the screw through the extra wire. I bought two new bulbs to see if both of those could be bad. Left turn is still fine and now I have a left tail light.
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Old 07-11-2012, 02:12 PM   #17
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We just had a problem fixed, symptoms matched yours pretty much. One side weak, no running lights. We found problem source by confirming voltage at TV plug using a meter. Might be worth checking voltage at tow plug to make sure it's ok if you have not already done so.

Our problem was in TV, was told problem is common. Trailer uses two wires for something tow uses one (or other way round), so there is a module box that feeds the interface where tv has trailer plug wired in.

Module goes bad then no current to running light wire of plug on tv. Or very little, we showed < 2 volts, but it sometimes did work, briefly.

We had the problem with original cheap 4 pin plug that dealer put on and figured it was plug wire because I used tester and found almost no voltage on one pin and another was weak. We converted to 7 pin and problem was still there, guy that installed the 7 pin on tv just ran a wire to bypass the module box and feed the trailer plug or junction where trailer plugs are connected to tv wiring.

Good luck.
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Old 07-11-2012, 02:54 PM   #18
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I don't think it is the TV as the problem with the right turn existed with the old TV and old plug, too. (Better not be as they installed it yesterday!) I haven't rechecked the splices yet, had to get good electrical tape, and will redo those this afternoon and try again. If it still won't work I'll check with the old tow.
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Old 07-11-2012, 03:04 PM   #19
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those are a standard light, for the cost i would replace them and end my worries. as to any splices,,,,unsplice them clean to solid bare wire, the solder them and shrink wrap them.
abd sond or grind all grounds to bare metal, reatach them then liberaly coat them with dialectric grease to prevent them from rusting.
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Old 07-11-2012, 03:07 PM   #20
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I haven't found the light fixtures yet though if I replace I'd just as soon do it with something brighter. But for tomorrow's trip that's not an option. I do have to get the right turn signal working again, though. I don't solder so that isn't an option, either, but I can wire them cleanly and hopefully that will solve the problem for now.
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Old 07-11-2012, 04:26 PM   #21
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Okay, at the moment everything works. But I had to wiggle the new bulb a bit to get it to brighten up and initially it was dull through the top wire, then bright through the lower wire. So maybe it is a ground issue? Now it seems fine, I suppose as long as I don't go over bumpy ground! I retaped wires and a couple were very close to gone so that was probably also a problem. I think rewiring the whole thing may be in the trailer's future, though, as there are way too many splices.
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Old 07-12-2012, 10:58 AM   #22
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And amazingly all still working this morning! Honk if you see me on the road.
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Old 07-12-2012, 11:12 AM   #23
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Glad to hear it's working. We have similar light issues every time we hook up our 26 year-old UHaul VT. It wouldn't be a trip without a light issue! Since your's improved by wiggling the socket/bulb, I would think it has to do with solid contact in the socket. Hope it stays put!
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Old 07-15-2012, 03:01 PM   #24
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Earlier in this thread, you mentioned wanting a tester device - I'm currently dealing with tracing a turn signal problem (TV or Trailer?). On Amazon.com, I found a 7 pin round tester for under $10. You just plug it into the Vehicle-side connection - the device has a bunch of little lights labeled for RT, LT, 12v, backup, brakes, etc. I discovered that at least part of my problem is the tow vehicle signal for right turns only works in conjunction with my brakes.

I think this will be a handy device to keep in the trailer. At least it can help point in the right direction.
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Old 07-15-2012, 05:41 PM   #25
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Anne, I used to have a 4-pin connecter that had lights built in to test what was coming from the TV. (On the old car now.)

Anyway, trip was good except I hitched up this morning and now the LEFT side doesn't work at all. I hope that is just the bulb as all of it doesn't work. On the other hand, the friends who brought the behomoth motorhome on our trip spent half the weekend trying to figure out why their generator wasn't charging their battery. I think I'd rather have the lights flickering. (Though it did occur to me it would be nice if I had a Wizard's Caravan- like Harry Potter's tent, bigger inside than it looks from the outside!
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Old 07-16-2012, 03:36 PM   #26
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glad you got it going... for something so simple...electricity goes in,,,,electricity goes out...12 volt can be the devils own torture...i hate working on them,,,maybe my mind is actually simpler then 12 volt as my wife keeps saying....<_<
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Old 07-16-2012, 07:35 PM   #27
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after you are done your trip, and have some time, try this:
1) Important- unplug from tow vehicle
2) remove lens covers
3) remove bulbs
3.5) make sure you unplugged from tow vehicle
4) clean inside of light sockets with plain steel wool, (not SOS or jets, you don't want soap pads)
5)blow out any debris from the cleaning, everything inside the socket including the brass pin that hits the bulb should now be shiny(er)
6)very gently squeeze the socket a little bit to make it tight on the bulb
7) check to verify you have the right bulb- one brass pin in the socket 1156, two Brass pins -1157
8)coat the bulb base (brass and lead tips) with di-electric grease and re-install
9)test them out

best of luck

Joe
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