4-Round wiring diagram?

[ZmOz]

I'm wiring my trailer to have two seperate connectors for the lights; one 7 way to attach to my truck, and a 4 round connector that my friend's truck uses. Does anyone know where I can find a wiring diagram for the 4 round plug? Google has shown me every style but that.

 

[demsvmejm]

Re: 4-Round wiring diagram?

Why don't you just buy an adapter? They sell (Hoppy I think) Round seven to round 6, round 5, and round 4. Otherwise I'll look at the shop tomorrow for a diagram.

 

[ZmOz]

Re: 4-Round wiring diagram?

Originally posted by David L. Moore:<br /> Why don't you just buy an adapter? They sell (Hoppy I think) Round seven to round 6, round 5, and round 4. Otherwise I'll look at the shop tomorrow for a diagram.

I've never seen an appropriate adapter, and I already have the 4 round plug to wire up. 4 round seems to be pretty rare, the only adapter I've ever seen for it is 4 round to 4 flat. I would imagine I could special order one from somewhere, but I'm sure it costs alot more than it should...

 

[tommays]

Re: 4-Round wiring diagram?

http://www.easternmarine.com/em_showroom/tech_info/light_tech.html

 

[gspig]

Re: 4-Round wiring diagram?

Check the terminals on the plug. Every plug I've seen has the terminals marked.

 

[ZmOz]

Re: 4-Round wiring diagram?

Originally posted by tommays:<br /> http://www.easternmarine.com/em_showroom/tech_info/light_tech.html

Thanks, but I'm looking for something like this:<br /><br />

<br /><br />Only for 4 round.<br /><br />No, they are not printed on the plug anywhere...

 

[cp]

Re: 4-Round wiring diagram?

Seems that 4-round connectors don't come with wires/pigtails attached because there is no standard pin-to-wire configuration like for the 6 and 7 pin connectors. If you look at the link tommays provided, you'll see that for the 4-round to 4-flat adaptors they tell you to verify wiring by function because the configuration may vary from one manufacturer to another. Probably best if you check your friend's 4-round connector and just configure yours like his. Good luck.

 

[Silvertip]

Re: 4-Round wiring diagram?

Use a test light on your buddies truck to see which terminals are which. Attach a four-flat to the four-round plug. Another way is to attach four wires to the four-round. Crimp a female bullet connector to each wire except the ground. Crimp a male to that wire. Do the same for the wires on the four flat using male bullets and a female for the ground. You can now connect any trailer, regardless of how screwed up the wiring is, to the four round by simply rearranging the bullets. I do the same with a pair of four flats. People do some really creative wiring so this arrangement allows towing trailers with non-standard wiring.

 

[demsvmejm]

Re: 4-Round wiring diagram?

Round four connectors are common for the umbilical cords on dinghys for motorhomes. That is the cars being towed behind an RV. I am sorry I got seriously sidetracked at my shop the last two days. I agree that you should check your buddy's truck to verify the pin functions. I will try to check again.

 

[Silvertip]

Re: 4-Round wiring diagram?

Don't make this so difficult. Attach a flat four (costs about $1.50 at WalMart) to the round plug you already have. All you need to determne is what the pin-outs are on your buddies truck. A two minute job with a test light or VOM.