Wiring brake light.
Im putting another brake light in the rear part of the shell, where can I connect the + wire to turn on it with the brake pedal, and maybe with the flashers but no with the turn lights?
Thanks in advance. |
I would just wire it into the trailer plug wires. Find the one that lights for the brakes and use it.
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Originally Posted by Neal 97 250
(Post 7136908)
I would just wire it into the trailer plug wires. Find the one that lights for the brakes and use it.
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I was pretty sure that the plug had a separate contact for the bakes but now you have me thinking.
Well you could always wire it up to your third light that you have now. |
Originally Posted by Neal 97 250
(Post 7137076)
I was pretty sure that the plug had a separate contact for the bakes but now you have me thinking.
Well you could always wire it up to your third light that you have now. |
there is a green wire in the trailer harness by the hitch that is just brake lights, i just tapped into it for my brake light on my topper
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Originally Posted by powersmoker96
(Post 7137280)
there is a green wire in the trailer harness by the hitch that is just brake lights, i just tapped into it for my brake light on my topper
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Update
Originally Posted by powersmoker96
(Post 7137280)
there is a green wire in the trailer harness by the hitch that is just brake lights, i just tapped into it for my brake light on my topper
I posted this question in the forum: Electrical Systems/wiring, and I thought more people was to answer something, but no :confused: only one so I want to post here the last part for an update and your help: Well, many, many years ago I used one of that aftermarket lights that will ignore the turn signal blinking, it has a little black sealed box, maybe with diodes and electronics inside with several wires in each side, and worked fine, but now I cant find another similar. :confused:. The third brake light on the top rear of the camper is a 30 led light, like those of some suburban from ´91., so I think is not a SMALL light.<O:p After trying to find out where to connect the light, I found in the harness under the rear bumper, a wire with a "free" connect (non used to anything) and it has power only with the brake pedal, so I connected the light there and worked fine for some time, BUT then after a few minutes, blown the fuse # 13 (15 amp) in the dash. What can I do to fix that, put a bigger fuse :-huh or to put some relay? or what, thanks for your input.<O:p |
Just my .02s, but i would run a relay with a dedicated hot wire(fused of course) to the relay and use that wire you found to activate the relay. This way it wont blow your fuse and comes on just like the rest of the brake lights.
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I am no electrical genius so take this at your own risk.
If you have the big round 6 or 7 wire trailer connector, the blue wire comes on with the brakes it feeds the electric trailer brakes. The only problem I can think of is the light will go from dim (light braking) to bright (hard braking). Might look cool :) A bigger fuse is not a good idea. #13 is supposed to be a 15A, right? I think a relay would work, not sure how many Amps the LED would draw. LEDs usually use less power than a regular lamps of equal size. |
Originally Posted by TexasDiesel97
(Post 7148975)
Just my .02s, but i would run a relay with a dedicated hot wire(fused of course) to the relay and use that wire you found to activate the relay. This way it wont blow your fuse and comes on just like the rest of the brake lights.
Originally Posted by Cuda_jim
(Post 7149058)
I am no electrical genius so take this at your own risk.
If you have the big round 6 or 7 wire trailer connector, the blue wire comes on with the brakes it feeds the electric trailer brakes. The only problem I can think of is the light will go from dim (light braking) to bright (hard braking). Might look cool :) A bigger fuse is not a good idea. #13 is supposed to be a 15A, right? I think a relay would work, not sure how many Amps the LED would draw. LEDs usually use less power than a regular lamps of equal size. and yeap the fuse #13 is 15A. What kind of relay I should use, and anybody has a diagram for the connections?. :-huh Im less than electrical genius.:-banghead |
i would use a 20 or 25 amp fuse(use the smallest you can get away with) with at least a 30amp capacity relay. Dont have a diagram but i'll explain the best i can. With the relay i'm refering to there will be four blade terminals each has a number(30,87,86, and 85). 30 will be the ove to hook to your light. 87 will be your fused power wire. 86 with be the wire from a switch(in your case the wire you found that comes on with the brake), also it would be a good idea to install a second fuse no more than 5 amps from the brake wire to the relay(helps prevent a possible short and is a added measure of protection). And 85 is your ground wire. This is the same way i wire up aux lights to my trucks, so i hope it makes sense and helps you out.
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Originally Posted by TexasDiesel97
(Post 7150306)
i would use a 20 or 25 amp fuse(use the smallest you can get away with) with at least a 30amp capacity relay. Dont have a diagram but i'll explain the best i can. With the relay i'm refering to there will be four blade terminals each has a number(30,87,86, and 85). 30 will be the ove to hook to your light. 87 will be your fused power wire. 86 with be the wire from a switch(in your case the wire you found that comes on with the brake), also it would be a good idea to install a second fuse no more than 5 amps from the brake wire to the relay(helps prevent a possible short and is a added measure of protection). And 85 is your ground wire. This is the same way i wire up aux lights to my trucks, so i hope it makes sense and helps you out.
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Jose
The relay you have will work just fine. The 5th terminal on a 5 pin relay is 87A and is a normally closed circuit and only opens when 87 is closed. http://www.classictruckshop.com/club...ch/foglite.jpg 30 would be your power supply 87 would go to the new brake light 85 would be your "free" wire that triggers the relay 86 is a ground 87A you don't need it, so just leave it empty |
Originally Posted by BlueMule
(Post 7152891)
Jose
The relay you have will work just fine. The 5th terminal on a 5 pin relay is 87A and is a normally closed circuit and only opens when 87 is closed. 30 would be your power supply 87 would go to the new brake light 85 would be your "free" wire that triggers the relay 86 is a ground 87A you don't need it, so just leave it empty |
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