Don't bother! The car computer will switch it off even if you use a maintained contact switch. I leave the parking lights on in my car and five minutes later the computer assumes that i forgot them on and switches them off. When I park alongside a dark road I want those lights to stay on until the battery runs flat dead! Much better than getting hit by a car who does not see the car. But evidently somebody does not understand the purpose of parking lights.

I guess my best solution is to trigger the fog lights off of the parking lights. Just didn't want to cut into any wires. I can control the fog lights through the fuse block manually but would like a latching relay circuit off of the fuse block and add a fuse in the circuit

 

Then like this, a completely independent circuit where the second set of contacts turn on the Fog lights assuming they are wired with one side grounded.

 

Then like this, a completely independent circuit where the second set of contacts turn on the Fog lights assuming they are wired with one side grounded.
View attachment 341791

Thanks. Just what I wanted

 

How much current do the Fog lights draw?

 

How much current do the Fog lights draw?

No sure. They're leds so probably about 10 amps

 

No sure. They're leds so probably about 10 amps

How do you manually turn them ON?
Is one side connected to ground, battery negative?

 

How do you manually turn them ON?
Is one side connected to ground, battery negative?

There is a momentary switch on the column stalk that activates the fog when the lights are on. It activates a relay that is controlled by the BCM.

 

There is a momentary switch on the column stalk that activates the fog when the lights are on. It activates a relay that is controlled by the BCM.

I can override the relay by removing the fuse and jumpering one side of the vacant fuse to the positive battery terminal. I want to build a circuit that will keep the lights on while the ignition is active.

 

I can override the relay by removing the fuse and jumpering one side of the vacant fuse to the positive battery terminal. I want to build a circuit that will keep the lights on while the ignition is active.

I can get to both circuits from the fuse block. I also have constant 12 volts at the fuse block

 

I want to build a circuit that will keep the lights on while the ignition is active.

Are you saying the Fog lights will shut OFF when the key is in the ignition position?

 

This version is a completely independent circuit to activate the Fog lights
When activated the Fog lights will stay on until the battery runs down or manually deactivated regardless of the position of the starter key.
Is this want you need?

 

This version is a completely independent circuit to activate the Fog lights
When activated the Fog lights will stay on until the battery runs down or manually deactivated regardless of the position of the starter key.
Is this want you need?
View attachment 341813

I think so. If all I need to do is bypass the fog lights fuse and use this circuit, it stops me from having to cut into the headlight wires which I would rather not do

 

I think so. If all I need to do is bypass the fog lights fuse and use this circuit, it stops me from having to cut into the headlight wires which I would rather not do

Is a dpdt bistable latching relay the same as a dual coil relay. I was looking on amazon and ebay

 

Is a dpdt bistable latching relay the same as a dual coil relay. I was looking on amazon and ebay

Would this work?

DPST 1NO 1NC 8Amp Latching Relay Module (DC 12V) https://a.co/d/bW3MGUn

 

That will work if the Fog lights don't draw more then 8 amps