6 of the 7 XJs my family's had came with electric fans. Then again...they were all 4.0s with A/C...
87,88,89,91,92,98
Also, I've never seen a temp sensor in the radiator. Renix ones (I believe) were on the bottom drivers side of the block, and the chrystler ones have it in the Thermo housing. The gauge one is on the back of the head.