Trailer Wiring?

[BOkerberg]

I am going to be putting some trailer wiring on my 92 W250. I was wondering on those 4 wires in the back that run across under the back of the bed, which color is which? I need to know what to splice into. What color is the taillights? What color is the left turn? What color is the right turn? Thanks for any help guys.



Brenton

 

[MXTMOPR]

http://www.etrailer.com/faq/wiring.asp

I hope this helps, it worked for me.

 

[BHiggins]

When I wired mine, I got a "plug in" harness. Under the back of the truck is a four way connector that you simply unplug and plug in the "T" harness between the two connectors... Done, without splicing a single wire. I think I got it from JC Whitney, but I'm sure any good parts house or website will either have them, or be able to get them.

 

[JRussell3176]

http://www.etrailer.com/faq/wiring.asp

I hope this helps, it worked for me.

Awesome link!! Thank you for posting that!

 

[AKimmel]

When I wired mine, I got a "plug in" harness. Under the back of the truck is a four way connector that you simply unplug and plug in the "T" harness between the two connectors... Done, without splicing a single wire. I think I got it from JC Whitney, but I'm sure any good parts house or website will either have them, or be able to get them.

They sell them at NAPA

 

[R C Cola]

Trailer wiring

Might want to do a search on 1st gen trailer wiring. Headlite switches fry, wires burn, need for relays, lots of info available. That is an excellant thread to save for later on wire colors for the plugs. I intend to print that one. If you tow seldom you may get by, but if you pull a lot things can get hot. R C

 

[MXTMOPR]

Might want to do a search on 1st gen trailer wiring. Headlite switches fry, wires burn, need for relays, lots of info available. That is an excellant thread to save for later on wire colors for the plugs. I intend to print that one. If you tow seldom you may get by, but if you pull a lot things can get hot. R C

Yes, do the relays for headlights and clearance lights. My rig has a total of 17 lamps that run on the parking light circuit alone, then you add the dash light draw as well. This is alot of current thru one tiny yellow wire going to the headlight switch. I ran 2 relays. One for the headlights and dashboard lights using a 30 amp breaker. Another one for the clearance/parking lights using a 30 amp breaker. Yeah its overkill, but at least when I hook upto a trailer I know I'm not going to have a fire under the dash. It's not too hard to do, and will keep your rig safe.

 

[MBergman]

Mopar part number 82400961 plugs right into the trucks wiring and includes the relay for the running lights.

Marc

 

[DBF]

Another way to off-load the dashboard switch is to make up a very short jumper cable, wherein the battery +12v to the trailer also goes to the trailer clearance lights, instead of the switched lead.



Stop, plug in the jumper cable, all the lights on the trailer come on, resume driving. No additional load on the switch.



DBF

 

[Niki]

Yes, do the relays for headlights and clearance lights. My rig has a total of 17 lamps that run on the parking light circuit alone, then you add the dash light draw as well. This is alot of current thru one tiny yellow wire going to the headlight switch. I ran 2 relays. One for the headlights and dashboard lights using a 30 amp breaker. Another one for the clearance/parking lights using a 30 amp breaker. Yeah its overkill, but at least when I hook upto a trailer I know I'm not going to have a fire under the dash. It's not too hard to do, and will keep your rig safe.

The headlights aren't already on relays? Powered directly from the switch? What a fine design I'm sure the headlights got brighter also when you put them on relays. I was thinking of doing it just for that purpose.

 

[MXTMOPR]

All lights and a bunch of other items are powered directly thru the headlight switch. Mopar did not use relays only fusible links in this circuit. I studied the wiring diagram in the service manual and holy cow, there is so much tapped into this switch its insane. Isolating the headlights and marker lights did improve the brightness considerably. They were ok before the relays, but now they are almost as bright as LED lights.

 

[ARhine]

The headlights aren't already on relays? Powered directly from the switch? What a fine design I'm sure the headlights got brighter also when you put them on relays. I was thinking of doing it just for that purpose.

I have never owned a vehicle that already had relays. Lots of GM, Chrysler, ect. . Powering from the switch is the norm, at least on the old stuff I drive.