Has anyone ever tried to wire an accessory to the interior dome light?? I'm having trouble finding a hot 12v (battery) node and a good ground for the PC board that controls the light. Why it needs a PC board and a chip for the dome light who knows:-)

Trying to short wire a valentine detector to a hot node on the dome light. WIth a two wire config. +12v and GND

Thanks in advance

 

check this out: https://www.6speedonline.com/forums/...e-install.html

 

Or just tuck the wire under the headliner. Use a credit card or video store rental card and tuck the wire down the A pillar and along the dash. Go under the dash and over the the phone connection under the radio. You have switched and unswitched 12v plus ground there.

 

You guys are the best.

This is why this is a great forum, i knew someone has tried this before..

Thanks again

 

Sweeper,
I recently did this exactly. Using a voltmeter, I found a 12V source and a ground. It works great. You don't even need to disassemble the whole center unit. Have you figured out how to get the center light itself out? (As you would to change a bulb?) Once you have the center lighting pod popped out, there is a 12V source and a ground. As the post above said, the hot one is the brown wire with white stripe. It's on the edge of the four wire plug. The ground is the wire immediately next to it.
Then I took a standard phone wire and cut off one end. I stripped a little insulation off the lighting wires and just grafted my phone wire onto there. I fed the jack through the spaces at the rearview mirror and it came out great. I didn't use the Valentine fuse.
The hardest part was scraping off the insulation on the lighting wires and and stripping the tiny phone line wires. The whole thing uses no more than about 6 inches of phone wire.
I can't figure out where his ground is in that diagram though.

 

Hey CMOS, that's exactly what I did, except as unclejosh states everytime i open or shut the door, or activate the dome light the det. shuts off then on. In fact last fall i was locking the car, forgot to shut the det. off, and as I walked away form the car the alarm went off, i discovered i had to do with the det. being left on. I suspect there was an interuption the ground circuit and sent a weird sig. to the porsche alarm sys.
You are right about the hardest part, i soldered the phone wire to a 12v node and a local gnd. except on the dome light circuit board. PAIN IN THE **** This causes a headache because I don't have enogh brains to shut it off when I leave the car. I think I'm going to re-wire today, probably to the fuse panel.
I like the credit card method FUNCTION 12 suggested. Except they won't give me a CC. I'll have to use the obsolete video rental card. I use netflicks.


CMOS are you an EE? Love the handle. We have a guy who has that on his license plate, audi s4 at work. I like Power FET MOSFET (or MISFIT) in my case

 

You could always use the wife's CC so if it breaks. No shopping for her.

 

I like the way you think!!

 

You bet! CompE, more specifically. And the handle really is complementary metal oxide semiconductor. Maybe I'll get a lic. plate for the car with that sometime. (Although I'm not a big fan of custom plates on conspicuous cars for some reason).

Anyway, my wire job has the same issue with it turning on/off with doors, although it's not really a problem. When parked, the V1 is either in the glovebox (around town) or off (at home), so I haven't had the issues with the alarm.

I also didn't solder it on because it was way hard to get up in there and I didn't want to risk dropping some hot solder into the car. I tried to disconnect the light pod, but I couldn't get the quick release wire clip to come apart. So I just tapped the wires directly instead.