Hi,

I am looking at purchasing 4 work lights and a ready to go wiring loom that has 4 outputs for the lights and includes a relay, fuse and 1 switch built in.
I would like to have 2 switches instead, to have one in the cab of the car and one in the tub, so i can turn them on before i get out of the car and then turn them off from the back of the car and vice versa.

From some research i understand i will need 2 single pole double throw switches but i am struggling to work out how i would wire them into the pre made wiring harness.

This is the existing switch on the harness.


Please let me know you ideas and if i need to provide more info.

Cheers Oscar

 

EDIT: Rethinking this, I no longer think this is a good answer with a revision in my later post correcting it.

Welcome to AAC.

Does this help?

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Welcome to AAC.

Does this help?

View attachment 351201​

Somewhat makes sense. The harness has positive and negative connections to the terminal already so would i have to use new ones that go to the switch first then to the harness?
Or am i able to use the 3 existing wires going to the switch and wire the 2 new SPDT switches somehow?

This diagram makes sense to me for a single light but i cant work out how to use it with a pre made wiring harness.




Thanks for your help!

 

1. Remove the existing switch, get two SPDT switches with LED indicators.
   
   
2. The connections that went to the switch are now your input to the lighting.
   
   
3. There are three wires—one is the positive supply to the light coming into the switch, one is the output from that to the lighting, the third is power for the LED indicator*
   
   A common nylon barrier strip with a double sided 0.25" Faston tab will allow you to easily connect to it.
   
   [source]​
4. Your extension harness will either provide the supply voltage directly, or reuse the source that was connected to the original switch, If you choose the latter, then you can just omit the battery connections. The power going to the original switch can simply be connected to the extension harness.
   
   
   In retrospect this is better than my first scheme which really didn't prioritize simplicity.​

*Which you can omit if you don't care about it. Note: if you want to use it you will need to determine if the wiring harness switches it, or if it is internal to the switch.​

 

1. Remove the existing switch, get two SPDT switches with LED indicators.
   
   
2. The connections that went to the switch are now your input to the lighting.
   
   
3. There are three wires—one is the positive supply to the light coming into the switch, one is the output from that to the lighting, the third is power for the LED indicator*
   
   A common nylon barrier strip with a double sided 0.25" Faston tab will allow you to easily connect to it.
   View attachment 351204
   [source]​
4. Your extension harness will either provide the supply voltage directly, or reuse the source that was connected to the original switch, If you choose the latter, then you can just omit the battery connections. The power going to the original switch can simply be connected to the extension harness.
   
   View attachment 351205
   In retrospect this is better than my first scheme which really didn't prioritize simplicity.​

*Which you can omit if you don't care about it. Note: if you want to use it you will need to determine if the wiring harness switches it, or if it is internal to the switch.​

i think i will do that yeah, without the led indicator it makes sense now


thanks alot!

 

i think i will do that yeah, without the led indicator it makes sense now


thanks alot!

If you want the LED you can just do this (assuming the switch's LED is designed for the 12V.)

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