How to run 12v wire from cabin to engine bay?
06-16-15, 05:58 PM
#17
Lexus Test Driver
Thread Starter
Seems like there are a variety of cool toggle switches I could use as well. Also saw a video about getting power from fuse box. So simple just stick a wire in lol
06-17-15, 06:08 AM
#18
Lexus Test Driver
Thread Starter
How do you all suggest I should mount the rocker/toggle switch? I found this on amazon:
Do switches fit in this?
Do switches fit in this?
06-17-15, 07:00 AM
#19
Lexus Test Driver
Thread Starter
I looked at the Amazon link you posted.
The cabin screen will have at least two wires and it plugs directly into what I will call the interface box. That interface box has the power plug, the cabin screen plug and the four plugs for the sensors.
would you like me to look in the wiring diagram to find a power location that switches on and off with key (ACC)?
Without looking, the cigar lighter and the console should have this type of power.
The cabin screen will have at least two wires and it plugs directly into what I will call the interface box. That interface box has the power plug, the cabin screen plug and the four plugs for the sensors.
would you like me to look in the wiring diagram to find a power location that switches on and off with key (ACC)?
Without looking, the cigar lighter and the console should have this type of power.
Thanks for the comment. Depending on the length of the wires for the senors, I may need to tap into a power source in the engine bay. Are you able to find a 12v power source in the engine bay, that is somewhere between the grommet and license plate? Thanks!
06-17-15, 09:54 AM
#20
Lexus Test Driver
I found a location controlled by the ignition switch and will post the information in about about 1.5hrs.
Last edited by Bgw70; 06-17-15 at 03:45 PM.
06-17-15, 05:15 PM
#21
Lexus Test Driver
Lex, I found a location in the engine compartment.
The ignition switch controls power to these Fuses.
As you can see, it is located in front of the master cylinder.
Note the 5amp and 10amp fuses that are side by side and closer to the master cylinder. You can choose one of these two. The new power wire must connect to the bottom side of the fuse in the picture or the side that is closer to the two bottom fuses, the 7.5amp and 10amp. Because the bottom side is the fused side
Now if you are going to supply your own fuse, you would use the top side of the 5&10amp fuses. I would recommend for you to go this way. That way if your sensors have an issue, they will not blow the use that controls the components in you car.
Here is the first of three pics from the wiring manual. Note, I am pointing out the fuses you want to use.
Your fuses are located in the upper right of the diagram. Follow the wire back to the left and you will see that they go to the IG2 Relay, IG=ignition.
Your fuses are located in on the top of the page and you follow the wires down the page. The 5amp goes to the ECM, I believe it tells the ECM that the ignition switch is in the on position. The 10amp goes to the injectors and the other side of the injectors go to the ECM, I believe the ECM applies a ground to the injectors when it wants them to supply fuel.
Okay, WAY to deep on theory. ;-)
Last edited by Bgw70; 06-17-15 at 05:48 PM.
06-18-15, 10:50 AM
#23
I suggested using an add-a-fuse to that engine fuse box so that way you would never worry about tripping a critical electrical component of the car. Its also slim enough to allow the fuse box to close properly. As for how to set your switch, a simple toggle switch to act as an interrupt on the power should suffice. A constant ground shouldnt be an issue, either.
Last edited by ShawnOk; 06-18-15 at 10:54 AM.
06-18-15, 12:15 PM
#24
Lexus Test Driver
I suggested using an add-a-fuse to that engine fuse box so that way you would never worry about tripping a critical electrical component of the car. Its also slim enough to allow the fuse box to close properly. As for how to set your switch, a simple toggle switch to act as an interrupt on the power should suffice. A constant ground shouldnt be an issue, either.
06-18-15, 01:11 PM
#25
Lexus Test Driver
Thread Starter
THANKS for the clarrification :-)
06-18-15, 01:48 PM
#26
Lexus Test Driver
A fuse tap may be just what you are looking for!
http://www.ebay.com/bhp/fuse-tap
And since it does a 90 degree, I think it will fit under the cover!
Last edited by Bgw70; 06-18-15 at 01:52 PM.
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