Will be sure to check that next thanks.
Main issue right now is still brakes. Fuses good, bulbs are good, and I just put in a new brake switch and still nothing. While car is on in park pressing the brakes shuts off the map light though. Starting to think the previous owner may have done something interesting...

 

Park is the only gear this happens in?

 

Park is the only gear the map light will turn on in. Drive or reverse the switch on the light does nothing.

 

Each of your doors has a courtesy light. Do these lights behave just like your map lights (only works w/the car in park) or do they work in a normal fashion?

 

Same as map light, only in park.

 

Does the car have the factory alarm?

Also, are you trying to turn these lights on w/the engine off and car is in gear or the engine is running and the car is in gear?

 

No it has an aftermarket alarm, doesn't work. I didn't pull or cut anything. And I have not tried it in gear with the engine off.

 

You need to see if these lights work w/the engine off and more to the point see if they work w/engine off but the car in gear as opposed to being in park.

Additionally, do the brake lights work w/the engine off?

 

No brake lights while it's off. And I will try that when I get a chance.

 

I'm not sure where satch is going with the map lights and being in park- although I have no doubt there's a reason- but I'll reiterate that the brake circuit is the place to start.
It's are a dead simple circuit that is ALWAYS supposed to be hot. so you can ignore a lot of other potentially troublesome components.
Figure out how they screwed up the brake light and you'll possibly solve the other issues in the process.

 

​​​​Right? This is so strange. The brake wires under the pedals are hot, and the new switches I put in works too. So all that's left is a ground issue or a cut or disconnected wire right?

 

And I'm very interested in what satch has me do next lol I have a lot of faith in him right now haha.

 

The S5 has a different set up than the S4 as it relates to the brake lights for the wire which comes off of the brake switch runs to other items besides the brake lights itself (shiftlock actuator is one of these items)

 

Which wires (as in color). And do you mean hot as is the wire has voltage or the wire feels hot?

 

Or possibly he's sexually attracted to copper...we don't judge here.

 

The green and white wire on the brake switch has power, which is what I meant by hot. But I only get voltage read from it while key is turned half (ignition) or the engine is on, not while key is out or not turned at all. The switch is fine and the green wire gets power when the switch is let go of by the brake pedal.
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The stop fuse powers the G/W wire and it should have constant power as it is powered by the BTN fuse which powers a host of fuses in the interior fuse box. Thus it is not to be dependent at all of the ignition switch. And what does the emboldened part mean? Which switch (brake or ignition) (which Green wire, Green or Green/White).

Unplug the brake switch plug (again, it has the G/W and G wires to it). Once unplugged from the switch, test the G/W wire for constant power w/no key then w/key to on.

 

G/W on brake switch is dead with no key. It is powered when the key is turned. I have tried it multiple times, this I'm sure of. I do get an erratic voltage number from said G/W when the engine is running, and a more consistent voltage when key was in and halfway turned (engine off though)

 

Was this w/the plug disconnected from the switch?

 

Yes it was. Both with the old switch, with the new one I put in last night, and with none at all.

 

Oh oh.

 

The previous owner just shared with me that he would pull a fuse under the hood on a regular basis to shut off the touchy alarm. Said that a little before he sold it to me, he pulled a fuse and doing that blew the main 80a fuse. He said he replaced it, but since that the radio hasn't worked. He claimed to be unaware of the fact that none of the lights work. The alarm didn't work when I bought it either though.

 

You need to check the voltage leading off of the BTN fuse in the engine fuse box (constant voltage). Wire color is White/Red. And the main fuse is 100 amps not 80.

 

Will do when I get home. Should I get a reading with engine off?

 

Both but you should also get a 100 amp fuse for the main fuse before you mess w/the car. One thing you could do though is to test the Green wire in the stop light switch (brake switch). W/meter set to continuity place one meter lead to the Green wire and the other meter lead to ground to see if the meter rings out (mete should not ring out). If meter does ring out then the Green wire is grounded out when it should not and that would explain some things as it relates to the brake lights not working. If the meter does not ring out then please jumper the two wires to force the brake lights to turn on.