Steering wheel harness

Hi,

I thought this would be an easy one to answer until I tried looking up the wiring schematics for the systems. I need to know which system was in the vehicle originally.

As far as your pics, the black connector's wires look rather heavy for what would be needed. However, we'll try to figure it out for sure.

Take a look at the attached pic and let me know which stereo this vehicle came with from the factory.

I will watch for your reply.

Joe

Looking at the wire colors you are looking for a yellow wire as the ground, a light green as switch one and a blue as the switch two. Looking at the wiring it appears you can verify the ground and switch 2 wires by connecting a VOM across them set for continuity and then pushing the mode button. That should make a zero ohm circuit. Also, to test the switch two wire you can connect to the light green and yellow and push the seek plus button and complete the circuit.

The diagram shows the three control wires. The way the switch works however is to provide a certain resistance between the three wires when none of the switches are pushed. That would make it difficult to test them as the resistance isn't shown. However by pressing the switches you can remove that resistance and create a solid circuit. So if you connected a meter between the Yellow wire and the light green wire like the red line and push the seek plus button it would show a short. Then if you connected the meter to the yellow wire and blue wires like the black line and pushed the mode button it would show it as a short. The issue I see with your radio could be in how it works with those controls. If the unit uses just an on off switch then the factory steering wheel controls will probably not work because the various resistance levels used with the OEM stereo may confuse the aftermarket one.
The yellow wire in that harness you show isn't power, it is the signal ground that only connects between the factory radio and the control switch.