Chrysler Repair: Fog Light Wiring, radio wiring diagrams, fog light wiring

Question
Afternoon Mr. Finston:

I am planning on buying a PIAA 2192 driving light kit (which comes with a wiring harness, relay, etc.) to install in my 2001 Chrysler T&C LXI.  While the PIAA kit comes with a manual switch/switch light; I would like to install the kit so that I could use the radio remote switch on the steering wheel to control the lights.

What I am thinking is that the steering wheel switch (which I don't use because I have gone to an after market radio), would be upstream from the kits switch/switch light.  My thinking is:  that by leaving the kits switch always in the power/on position, the lights would actually be controlled by the steering mounted switch.

So my question is:  can I actually use the steering wheel mounted switch....and how would I need to wire it in order to use it?

Thanks In Advance!

Answer
Hi Paul,
I don't have the '01 radio wiring diagrams but rather the '02. On that model there is a left and a right side radio remote switch. The switches are both connected by a common pair of wires to two pins of the body control module which then communicates with the radio control panel. Basically the switches have a resistor of different value for each of the switch choices and the body computer's two wires measure the resistance that it 'sees' when either switch/position of the switch is selected as the cue as to what you are requesting. If you only have one switch then I would not be sure as to what it is doing, though it probably has the same concept. That switch probably does not have two different 'states' but rather an 'open' position (when at rest) and a temporary resistive position when the buttons are touched.
If the fog lamp circuit is a straight forward relay control, you would want to have the steering wheel switch be two position: open or grounded so as the activate the relay by grounding the actuating coil when you want the lamps and open when not. So in that respect if the switch is as I described it it would not be an appropriate device to activate the relay and keep it activated. It could be that there is a grounding or voltage 'up' output on the bcm that is activated by the remote switch, but rather I believe that the bcm comminicates to the radio via the digital communications wire (pci) because of the multiple functions that is activates.
If this is the case, then the steering wheel switch would not
'fill the bill' for the relay control.
That is about the most I can offer, given what I have to work with.
Roland
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