Can anyone recommend an easy path to wire from engine to interior for a relay or switch. Would like to install some fog lights for my s type and didn't know if I need to drill through the firewall or if there's an easier way of installing the switch from the inside? Thanks everyone for your help!

 

From your signature it looks like you have an 06 STR.
If this is indeed the case, STOP. If you are trying to install fogs in the openings up front where the 05 and earlier cars had fogs, take a look. There are oil coolers in the outer lower grilles.
Putting fogs in those spots will cover the coolers and will cause engine damage.
If you are installing in another location, carry on.
Can't help getting through the firewall.Sorry.

 

You are correct adding lights and need a switch to the inside. Figure I would ask and see if there's a way with out drilling or if I have to drill where's the best place ?

 

So... you can't put them where the older cars have fogs. Where are you planning to put them?

 

Just above where the fog would go. It's about 1" in height plenty of clearance and room for air.

 

I wonder why Jaguar didn't put them there, then. Ideas?

 

I understand I can move them elsewhere. Just looking for an easier path that's all.