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Clevite 77
GenIII
9/21/2002
23:34:52
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 Subject: electrical problem with trailer lights
IP: Logged
Message:
I have a problem with my boat trailer / or truck.
A few days ago it worked fine, but now, only the flashers, and brake lights work. I checked continuity from the plug, back to the lights, and it seems ok. I just replaced the rear light assembly on both sides.
My truck has the factory towing package, and I tested the connector where the adapter plugs into (the thing attached to the truck), and I get a steady power, and the flashers work, (using a test light) but the regular lights don't light up.
It's a newer truck with plenty of warranty left on it so that's not a problem. But in the mean time is it something easy like a fuse? My truck lights are fine. Is there a separate fuse for the wire harness from the towing package?
Thanks for the help
"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."
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BlackDak02
*GenIII*
9/22/2002
01:12:26
| RE: electrical problem with trailer lights
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Message:
Dunno, Clevite, I'm guessing maybe a bad ground on the trailer-lights. Did you get it wet at a boat launch? Do the lines coming out of the trailer plug for the running lights have power with the socket plugged in?
Pull a bulb out of the socket on the trailer and test the socket for power to the running lights. Sometimes water gets in there and corrodes the contacts. Sometimes the trailer socket itself gets corroded, take a good look at that also.
You can get some silicone-dielectric grease and apply it to the socket and the bulb sockets to avoid corrosion.
I use an old medicine vial slipped over my trailer socket when not in use to seal the socket from moisture. Hope this helps.
2002 Black CC SLT 4x4
4.7L 45RFE 3.55 LSRD
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lew
Dodge Dakota
JOIN HERE
9/22/2002
17:14:04
| RE: electrical problem with trailer lights
IP: Logged
Message:
When you back your trailer into the water be sure to unplug it from your truck. If you don't, you can screw up the circuit when it gets wet.
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CW
GenIII
9/22/2002
18:20:37
|  RE: electrical problem with trailer lights
IP: Logged
Message:
There should be a fuse for the trailer in the PDC under the hood.
2001 4.7 5sp 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" Z-tube, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams, Robert shaw 180 therm, HO intake manifold.
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99blkdak
Dodge Dakota
JOIN HERE
9/22/2002
20:36:24
| RE: electrical problem with trailer lights
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Message:
I know with mine no matter what trailer is behind me, when the parking lights/Headlights are on, when I go to use a turn signal all the lights on the trailer flash, but only the side that I have on on the truck is flashing. Strange.
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Bill
GenIII
9/22/2002
20:43:25
| RE: electrical problem with trailer lights
IP: Logged
Message:
I have problems like this on my boat and snowmobile trailers and it is usually the ground on the trailer wiring. Try John's suggestions, that usually what it takes for me.
Bill
Bill's Truck Page
ARE Tonneau Cover
Wet Okole Seat Covers
Homebrew Intake and Other Mods Coming Soon!!
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Clevite 77
GenIII
9/22/2002
21:18:30
| RE: electrical problem with trailer lights
IP: Logged
Message:
Well I greatly appreciate all of your suggestions and help, but it looks like CW is the winner, he hit the head on the nail. Thanks a lot man, you saved me a bunch of time and hassle. I thought the fuses in the truck were it, I didn't realize there were more. I changed it with a spare and they work fine now. Thanks again man. Joining this site has just paid for it's self.
"If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit."
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Texas Todd
Dodge Dakota
JOIN HERE
9/23/2002
12:47:45
|  RE: electrical problem with trailer lights
IP: Logged
Message:
When my '01 QC, with Trailer towing was about 9 months old, it blew a fuse pulling my Catamaran.
replaced the fuse, but the trailer running lights were gone. I traced it as far back as my new truck, sliced into a running light wire and was good for a couple of days.
The dealer found that the harness had rubbed thru somewhere under the truck at the frame! Good work Dodge! Been fine since.
HOpe this may help.
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kenny
Dodge Dakota
JOIN HERE
11/16/2002
17:51:57
| RE: electrical problem with trailer lights
IP: Logged
Message:
My 2002 QC w/4wd, trailer tow, etc is doing the same thing. I found the fuses in the cab and those under the hood. Don't see which one under the hood it might be. On the factory wired light adapter (by the hitch) it refers to the contact as "running lights". I don't see a fuse with that label. I'm looking in the fuse box right behind the battery. Is there ANOTHER one?
thanks!
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Ken Stassi
Dodge Dakota
JOIN HERE
11/17/2005
16:24:58
| RE: electrical problem with trailer lights
IP: Logged
Message:
I seem to have the electronic break wire on my trailer switch with the break lights. i have a 1984 starcraft continental. My truck is a 2005 2x4 1500 dodge ram. Do you know the wiring configuration on the trailer.
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Elliot 1998
Dodge Dakota
JOIN HERE
12/18/2005
20:30:24
| RE: electrical problem with trailer lights
IP: Logged
Message:
Hey, wow -- CW, you just solved MY problem also -- three years+ later! I just had the same problem, and sure enough, there was a 40 amp fuse marked "trailer" (identified on the inside of the cover. Blown. Gotta love this online thingie! Thanks CW and everybody, and Merry Christmas!
Elliot
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Wade P
Dodge Dakota
JOIN HERE
8/27/2022
17:46:21
| RE: electrical problem with trailer lights
IP: Logged
Message:
Hey Wow, CW you just solved MY problem also -- if my math is correct 20 years later.
First time connecting to 7 pin connector. The wife bought a 1977 modified boler trailer. They were originally 4 pins, but now is 7 pin to charge added batteries, etc.
long slow clap from me.
Wade
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