I still think it is the auto dimming headlamp sensor
I dunno, i cant find that in the book under the domestic stuff. The C106( Forward Lamp Harness to Body Harness) connector lists:
A Outside Air temp sensor signal
C Outside air temperature signal
D Low Reference
F Not used
It says this is for utilities with OHC except envoy. The envoy model has a different plug and contains a headlamp supply voltage and an extra pin. The Export plug has all the same stuff as the other two, with an even different plug but instead of headlamp supply voltage it has headlamp leveling motor supply voltage. All 3 units list the same color codes for the two diff temp sensor leads. If in my digging I find anything related to auto dimming headlamps I will let you know. For now the only thing I have found is auto leveling for export. Something my VW does.
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Exploration Machine- 02' CC V8 swap. 300K+
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Its another Jeep- 98 TJ