So I need some help...what wire can I tap into that is at least 10 amp fused and has continuous power from the on-to-start positions?

I've installed a new wide band and boost gauge from AEM. The power sources I tapped are causing problems. The gauges I purchased have auto-zero features and the "auto-zeroing" is not getting an accurate reading because I have a power source that drops power in the start position. Basically, the gauge tries to reset when I start the car, the pressure sending unit is getting the wrong "zero reading" and causing my boost gauge to read around 10 lbs off.

Thanks

 

I know I can check all wiring in the fuse box with a test light but just hoping someone can save me some time...also I dont have a second set of hands right now to be under the dash and turning the key over at the same time.

 

help!

 

The black /w white stripe wire in your steering column is the wire you want. Take out the three screws under your steering wheel, drop down the tilt lever, and pull off the lower housing. On the left hand side you will see a bundle of about 8 heavy gauge wires running to the ignition key switch and it is right in there.

The characteristics of the black /w white stripe wire are as follows.

Key off: No power.
Key ACC: No power.
Key on: 12V
Start: 12V (does not shut off while cranking)

I have found that this is the ideal wire to use for boost gauges because it lets you listen to the radio without the gauges coming on and possibly beeping for no oil pressure, and it does not re-set the gauges while cranking.

 

Out of curiousity, what does the black w/white stripe wire power?
Also getting ready to install a boost gauge and wideband.

 

I wired mine to my stereo wires. Haven't had any issues. I never listen to the radio in the acc position so I'm good.

 

Exactly what I needed....thanks Fishie!

 

The stereo shuts off when you hit the start position...this causes gauges with auto zeroing features to get an incorrect reading because in the split second it takes to start the car and restart the gauge it will get a false zero.

 

As far as I know the black/white wire powers everything in the car that turns on when the key is in the on position. Anything it doesn't feed directly is controlled by relays/ecu.