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#1
06-11-2007, 09:56 PM
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123 trailer wiring
Has anybody wired a flat 4 trailer connector to an '82 300D ? I have the directional and running lights working but no brake lights. Is there a special wiring module for cars with the amber directionals? Seems , I've read somewhere that the foreign cars have a different system for the taillights.
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'83 240D 264k  on 100% biodiesel/ 31mpg 83 300D 217K  the $800 gem '82 300D 267K the new WVO project car  finished and driving for free International tractor B275 on B100 Ford 555 backhoe on B100 Sargent 25 ton Rough Terrain crane on B50  
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#2
06-11-2007, 10:11 PM
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yes, probably it is a problem. On the american autos the turn and brake are usually combined. The european system has a separate amber turn signal. I solved it on my small travel trailer and Saab tow vehicle many years ago by adding an amber utility light for the turns on the back of the trailer.
There may be an electronic gizmo which does it without all that bother Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#3
06-11-2007, 10:27 PM
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there is a "gizmo" that will do it for you, any trailer supply house or uhaul would have it in stock. tons of vehicles have this setup. personally, I would just use a 5 pin harness, and wire it myself with extra lights on the trailer.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#4
06-11-2007, 10:56 PM
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The only factory hitches that Mercedes put on were in Europe and had a nine pin connector. I think pre 1981 needed a relay and a special emergency flasher switch and the later ones just needed the wiring harness.
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Doug 1987 300TD x 3 2005 E320CDI
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#5
06-11-2007, 11:51 PM
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Yes, any auto parts store should have the connector. Not much more expensive than a standard 4 pin connector. Used one on my 85TD this spring. It combines the amber turn signals and brake lights into the same bulbs on the trailer.
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1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#6
06-12-2007, 06:16 AM
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As was stated.....
Most Auto Perts Houses, Boat stores (Boat US, West Marine), and any trailer hitch place...even U-Haul stores have the item of interest.....
It's generally a little black plastic thingy....a little bigger than a match box.....and generally comes with some double sided stickey stuff to attach it in a hidden location...... I think it is basically a Wheatstone Bridge....Diode Bridge.....that prevents electrical feedback to the other circuit (brake light, turn signal).....encased in plastic..... SB
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 Diesels: '85 300D, "Max, Blue Benz", 155K, 27.0 MPG '84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG '77 240D (parts car) '67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP) Gassers: '94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG '85 190E 2.3, 148K....Parts Car '58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG
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#7
06-12-2007, 07:05 AM
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thanks , I'll stop at the RV store today.
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'83 240D 264k on 100% biodiesel/ 31mpg 83 300D 217K the $800 gem '82 300D 267K the new WVO project car finished and driving for free International tractor B275 on B100 Ford 555 backhoe on B100 Sargent 25 ton Rough Terrain crane on B50
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#8
06-12-2007, 12:05 PM
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i just took the straight cables and soldered them to my brake connectors on the inside of the brake light. it worked like a charm for me.
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 Grey '91 350SDL 214k Dad's car Beige '81 240D 4 Speed 254k SOLD Blue '82 300D 225k SOLD White '95 E300D 46k SOLD Blue '87 190D 2.5 Turbo 315k SOLD Brown '80 240D 4 Speed 716k SOLD Beige '80 300D N/A 119k SOLD Blue '85 300D Model 186k T-Boned
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#9
06-12-2007, 12:51 PM
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Cruze Conrtol???
Quote:
SB
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Diesels: '85 300D, "Max, Blue Benz", 155K, 27.0 MPG '84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG '77 240D (parts car) '67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP) Gassers: '94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG '85 190E 2.3, 148K....Parts Car '58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG
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#10
06-12-2007, 05:38 PM
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I agree
I'm going to get the converter with the built in circuit protection , its a couple bucks more but worthy it in the long run.
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'83 240D 264k on 100% biodiesel/ 31mpg 83 300D 217K the $800 gem '82 300D 267K the new WVO project car finished and driving for free International tractor B275 on B100 Ford 555 backhoe on B100 Sargent 25 ton Rough Terrain crane on B50
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