Linking headlights to interior light

[geraintthomas]

Originally Posted by Meir

the short answer to your question is yes.




First I need to correct PW. As I mentioned in one of my previous posts, the courtesy light trigger is positive.
With that said, it doesn’t really matter.
Once you use a relay (and you must in this case) the polarity of the trigger is irrelevant.
You just need to connect the other side of the solenoid to the opposite polarity.
The solenoids is like a bulb, it will work once it gets positive and ground in the two poles, and it doesn’t matter which pole gets which polarity. (I hope I’m not confusing too much)
If you guys a really interested to understand how a relay works, let me know and I’ll make a short video.
Back to the car.
In our case, we will need to use two relays due to the fact that the lights system is divided to left and right. You have two wires coming out of the switch, and two fuses on the fuse box. So each line needs a relay.
I was working a bit on my car this weekend, completing the installation of an “in dash” in garage opener, and started working on the electrical system of my home made PSE.
So I looked around a little bit, and it looks like the easy way to accomplish this mode, will be doing it behind the light switch. It is really simple project.
I promise to show in detailed how it’s done. I just need to find the time to do it.

You're a star.

With the courtesy lights and the parking lights both being 12v, I thought it didn't even need a relay.

I've got footwell lights that come on when the courtesy lights come on, and dimmer ones that come on when the parking lights are on (for ambient night driving). I would have thought that, if both parking and courtesy lights are triggered by positive, then you'd simply splice the two with a diode, so one can turn the other on, but not the other way around.

But, I know very little about electronics and there's probably a very simple explanation to why that doesn't work when you get it working, do tell!

I've also got bypass pipes, and would have loved electronic valves. The electrics aren't worrying me, it's what valves to use. They'd need to be small to fit in the space. What did you use?

[Meir]

Originally Posted by geraintthomas

I've also got bypass pipes, and would have loved electronic valves. The electrics aren't worrying me, it's what valves to use. They'd need to be small to fit in the space. What did you use?

im using vaves taken from a BMW 335i, that are 2inch in diameter.
not sure what bypass you have, but in my opinion that guy did it right.
http://986forum.com/forums/general-discussions/50649-homemade-pse-version-1-0-done-behold-evan-sport-exhaust-pics-vid-writeup-%3D.html

if my experiment works well, mayby i will build another set with the capristo valves.
ExhaustSystems » Exhaust Valves » Exhaust parts » Car Models » Capristo Automotive

[geraintthomas]

Originally Posted by Meir

im using vaves taken from a BMW 335i, that are 2inch in diameter.
not sure what bypass you have, but in my opinion that guy did it right.
http://986forum.com/forums/general-discussions/50649-homemade-pse-version-1-0-done-behold-evan-sport-exhaust-pics-vid-writeup-%3D.html

if my experiment works well, mayby i will build another set with the capristo valves.
ExhaustSystems » Exhaust Valves » Exhaust parts » Car Models » Capristo Automotive

I've had this done to mine:



A pipe that connects just after the CAT's, and goes straight to the tail pipes. Same on each side. The sound is incredible and it was very cheap to do ($150 in dollars, all in).

And was wondering if there were small electronic valves that I could put on the pipes where they attach the pipe after the CAT's. Trouble is I can't find any that are small enough as mine are 1" pipes, and the ones I can find are vacuum actuated and not electronic. I'd happily fit a vacuum solenoid with a switch on the dashboard, but where on earth do you get a vacuum supply from to go into the solenoid? If there's a good way of supplying a vacuum feed to a solenoid, then yeah, I'd do it

[Meir]

From the picture it’s hard to tell the diameter of the bypass pipe, but if the pipe is 1.5" you can go with the 2" valve and use a reducer. I personally don’t like the electric version of these valves, but it can be done with both.
2.0" Electric Exhaust Cutout Downpipe Kit E-Cut Catback Valve Manual System | eBay
If you look at the link I posted before, the guy shows in detail the hookup of the vacuum system and the electrical portion of the control.
Not too complicated.
I started with 2” -1.75” reducer so the bypass pipe is 1.75, and the valve is 2”.
2” is the smallest valve I could find. I’m currently straggling with the 180 degree U pipe that I will probably have to fabricate, or change the plan and go with 2”-1.5” reducer and 1.5" piping.
You can see more about project here:
General piping question
I still need to work on my fabrication and welding skills so I’m learning.