Prius wire color code

The 200v lines are generally orange.

 

Usually "red" is positive, and "black" is negative or ground when dealing with 12 volt DC systems. But this probably isn't what you want - however your question is kind of vague....

 

the only color code is: orange= high voltage death, yellow= airbag system.

 

HV wires are usually orange, at least where they pass between major
modules. Everything else is all over the map. In the Prius, power
supply wires can be just about any color, and many ground wires are
WHITE with a black stripe but that's not necessarily consistent
either. Forget anything you thought you knew about typical color
assignments in 12V systems when working on this car. Get the EWD
and associated documents from TIS, it's all in there.
.
_H*

 

wiring harnesses contain different color wires simply to differentiate which wire in the harness does which function.

the radio wiring is pretty universalized. red= power black= ground, but the harness that plugs into the back of the radio won't match those.

probing the wrong wire can fry a computer by backfeeding .5v into it- make absolutely sure you've got the EWD to double check everything before moving ahead with your mods.

 

the EWD as drawn shows the system with the car in "off" mode. as part of each section's circuit diagram is a system outline explaining what current is going to do when the circuit is activated. it's the job of the person looking it up to determine whether any of the activation conditions are met and determining if the circuit is functioning properly. the system outline will tell you what the voltages should be if the system is activated.

the "service hints" section will clearly indicate the conditions i was talking about above- to clairfy further.

another hint: don't use a test light- get a logic probe.