So I'm just about ready to hook up the discreet oil temp & oil pres gauges I've installed and I have a couple of questions to see if I can get some input on. I'm going to need power and ground which I figured I'd tap off the fuse block. The sensors are fairly straight forward too. It's the lighting that concerns me and the CANBUS that these cars operate with.

Can I tap into one of the dash or center pod wires that provide switched/dimmed lighting without the car throwing a code?

Or is there a tap on the fuse block that's switched/dimmed lighting perhaps to use?

 

hey, what did you end up tapping into? i'm putting a boost gauge next week...did you tap close to the driver side or did you extend to the fuse box and use a fuse tap?

 

Went over to the fuse box. Not as easy but the better choice in my opinion.

 

gotcha. thanks. what did you tap in to? or did you have/find a wiring diagram?
i haven't event looked under there yet but want to be prepared when i do.

 

Papa. Did you manage to find a dimming circuit in the fuse box or just an on off. I now have the time to install my gauges and it would be nice if they could dim.

 

Is it possible to tap into the light switch itself?

 

There is no light switch...no 12 volt circuit. It is all software based. That is why the dimmer switch panel to the left of the steering wheel only has 3 wires going to it. Mine has 2 sets of light switches a 4 position switch for the main headlamps and the dimmer....3 wires and a massive circuit board! Not for the faint of heart....

 

Hmm. I wonder if you can piggy back of off an output somewhere other than the fuse block.

 

You could patch into the board below the steering wheel on the left. The one with the dimmer on it. If you have the fog light switch it is dimmed I believe.

 

Just received my boost gauge and will install it in a few days...

Does anyone knows if the fog lights switch is dimmed and ok to tap in?

Or should I extend to the fusebox, fuse #52 seems to be the one to choose from what I've read so far?

Thanks for any help!

I'll take pictures of the whole install and do a "how-to" for future reference on NAM! 🤗

 

need help with this as well for boost gauge install. Anyone?

 

I connected constant power and ignition to the fuse box. For constant power, I used a fuse tap in slot #87. For ignition I used a fuse tap in slot #50. For my gauge light, I connected to ignition because the LED would flicker if I connected to the instrument panel cluster. Therefore, my gauge light is always on.

 

will try that route, thanks.