The fog lights are not connected to the switch in the cab, if that is what you are thinking. The Steering Control Module (SCM) monitors a hard wired multiplex input from the left multi-function switch to determine whether the fog lamps are selected, then sends an electronic front fog lamp switch status message to the instrument cluster over the Local Interface Network (LIN) data bus and the cluster relays an electronic front fog lamp request message to the TIPM over the CAN data bus.
When the TIPM receives a front fog lamp request message it then controls front fog lamp operation by controlling a battery voltage output through high side drivers (MOSFET) on right and left fog lamp feed circuits. The TIPM also sends the appropriate electronic message back to the cluster to illuminate or extinguish the front fog lamp indicator. In certain markets where required, the TIPM will automatically de-energize the front fog lamps any time the headlamp high beams are selected.
The MOSFET mentioned above monitors the fog lamp circuit for higher load than the factory lights require, and will shut the circuit off when it sees a higher draw.
I'm not real clear on how you connected the new lights. Does any of the info above seem like it has something to do with the issue you have?
2008 Unlimited Rubicon Automatic