Dual Dependent Relay Setup

[tj_wrangler_sc]

I have a specific scenario where my new spot light/flood light pods have three wires feeding them. (Black-Ground, Red-white LED, Yellow-Amber LED) as you can imagine I’d like to have a simple operation to use one color or the other but only if the fog light switch is active essentially giving the go ahead to the pods and for them be selected for the desired output color.
Here’s what I’m thinking and please tell me if this would or would not work and if not is there a viable solution?
The existing 4-pin Tyco relay relies on the factory fog lamps switch and works fine.
I’m thinking if I take the wire coming from Pin87 out of the existing relay and rebuild it in a slightly heavier gauge wire to feed the pin 30 of a neighboring 5pin tyco relay I can then run my switched 18ga from within the cab to toggle the colors between the 87 & 87A pins.
I hope that I’ve explained it so that you can easily understand what I hope to achieve, if not please feel free to ask questions.

 

[macleanflood]

A drawing would help.

Where are you installing the relay? I put mine in a box mounted to a custom battery tie down I made.

Basically yes you can trigger that relay in two ways...one from your switch and two from the OEM fog light switch.

I did something similar for my reverse lights...I have a red/white pod on my spare tire...red to brake switch...white to a relay that either triggers on oem reverse switch or a dash switch.

-Mac

 

[C.J. Roberts]

I have a specific scenario where my new spot light/flood light pods have three wires feeding them. (Black-Ground, Red-white LED, Yellow-Amber LED) as you can imagine I’d like to have a simple operation to use one color or the other but only if the fog light switch is active essentially giving the go ahead to the pods and for them be selected for the desired output color.
Here’s what I’m thinking and please tell me if this would or would not work and if not is there a viable solution?
The existing 4-pin Tyco relay relies on the factory fog lamps switch and works fine.
I’m thinking if I take the wire coming from Pin87 out of the existing relay and rebuild it in a slightly heavier gauge wire to feed the pin 30 of a neighboring 5pin tyco relay I can then run my switched 18ga from within the cab to toggle the colors between the 87 & 87A pins.
I hope that I’ve explained it so that you can easily understand what I hope to achieve, if not please feel free to ask questions.

Decent idea, but it won't work the way you think. The 87a pin is normally on, instead of normally off like 87. Here's a wiring diagram showing that.

Pole 86 gets power from the switch. Pole 85 is the ground for that. Pole 30 gets power from battery, and routes it to Pole 87a to always be powered. Pole 87 gets power when the relay is triggered, and in doing so removes power from 87a.
Your idea of tapping into the existing relay for a trigger is good, as long as that is only going to trigger supply power to the other relays.
What I would do is use SPDT Center Off, (Single Pole Dual Throw) switches for the lights.
Once you have power from the existing relay to Pole 86 on the light relays, you then need full battery power going to Pole 30 on the light relays.
Power from Pole 87 goes to the center pole on the DPDT switch(s). From there, one wire from the light, say the yellow, is connected to the bottom pole on the switch. That way, when you throw that switch to the "Up" position, the amber light come on. Connect the red wire to the top Pole, and when you throw the switch "Down" the white light comes on. Here's what that would look like.

Of course you want fuses in the circuitry, one from the existing relay, and one from the new relay(s) as close to the power supply as possible.
I hope this helps. If I can help further, I'll try to do so.