2007 tundra sr5 5.7 2WD

Help.
Bought a 07 Tundra sr5 5.7 2WD long bed for the weekend project and trying to Identify theses two sensors from 11 cut wires here and want to see if anyone have and want to share wiring diagram, wires color code to these cables or at least id theses two sensors, the picture with unidentified sensors are from screen shots from YouTube and don’t physically have the parts for further research. Pictures range from 0-4 and it has descriptions for clarification. Thank in advance.

 

I responded to your Facebook post showing the sensors.

What else do you need to fix it? Can you patch the wires back together based on color?

 

I’m was using multimeter(probably needs new batteries or test leads wires) trying to read ohm, continuity, and voltage but I don’t know if I do it correctly.Because it looks like to me that some of those red wires and or (blue wire which I believe fog light wire) using more than one ground wires (white with black strip) which gives me 12.6 volts at voltage test, beeping when checked continuity or is there a pacific way to do it?

 

I am assuming yours is cut in the are where I drew the red box labeled cut area?

 

Yes that where it cut

 

@Jeff_5_7 What a thorough and helpful reply! good stuff!

 

I just posted above the wiring for each sensor. Including the sonar junction, it is 11 wires total.

3 White/black ground wires all lead to ground A2 so they are all essentially the same.
Blue is Power for the foglight.
Violet (Purple), White, Green are for the Sonar junction. However Purple is also for the Ambient Air Temp Sensor.

You will have to spend some time tracing wires to determine which red and purples wires lead to where ect.

 

I’ll try tonight when I get home and will post any question I have

 

Do you have pictures of the other end of the cut? If you look at both sides closely you may be able to match wires back together by seeing identifying marks in the cut ect.

Understanding how to use a multimeter will also be very helpful. Post any questions you have. Additional pictures with questions are really helpful in understanding what is going on. This shouldnt be that bad to fix will just take a little bit of time.

 

I don’t have the other end also I don’t remember seeing white blue wire but will take a closer look tonight

 

Where do you how you trace it back to?

 

Post a picture of the other end of the broken harness first.

Wires can be traced back to source with some clever tricks and a voltmeter.

 

This are the only things that I have from other end I believe fog light harness connector and wireless door buzzer

 

After a closer look I think one of the white wires is just plain white with nos tripe, if this wire for ultrasonic sensors then, red wires and two purple wires are main focus here because here because green wires for ultrasonic and blue for fog light am I correct?don’t really want to fry modules

 

Yes you need to figure out which purple wire is for temp sensor and which is for sonar. Then figure out the 3 red wires. The rest should be easily identifiable

 

I was able to finger out wires for wireless Door buzzer using (THINKDAIG OBD2 Bluetooth) bi-directional.For fog light I was using AMES CM400A multimeter for continuity ( red test lead to blue and black lead to all three remaining white wires (including plain white wire) but no beep, ohm read all over and DC voltage read all over as well,then I checked fog light fuse #9 15 amps for continuity and it beep and visible check for broken fuse but look intact so I think fuse is good as well, I even connected those mentioned wires to aftermarket fog light with no harness but no luck, aftermarket fog light is good because it works when I connected it directly to battery.So the question is is there another fuse or relay that I need to check especially for fog light blue wire, if there’s non then what is my next focus should be? I will start working on ambient temperature sensor and AC pressure SW sensor tomorrow.Hopefully I find the sensor with harness connector cause I don’t those connectors pulling (sensor from pick and pull ).

 

Take your multimeter and set it to DC voltage. Test the post of the battery to make sure it displays a steady 12v or so. This will confirm meter is setup right. One lead to positive battery terminal the other lead to negative battery terminal.

Then put one lead to blue fog light power, the other to negative terminal/ground on the battery. Make sure the fog light switch and headlights are on. As well as key on. Headlights should be on dim not bright. Do you get 12v on the blue wire now?

 

Just checked and battery is 11.8 v am charging it now and will post any updates and questions tomorrow evening.
Thanks a lot

 

Am able to reconnect all the sensors (parking assist not equipped) the only thing that left is fog light and I don’t have option for it to select but obd2 gives me option to activate relay for fog light.photo in file below

 

If you have the fuse and relay, you can buy and add in a switch to have fog lights if you really want to

 

Hi Jeff I really appreciate all your time and effort, I now have all those connectors back in place. I will start a new thread for abs vsc and traction control.