Chrysler New Yorker

1994 Chrysler New Yorker 3.5L 160K

The A/C compressor does not operate. The relay is functioning properly (swapped with another, no change) Installing a jump wire to bypass the relay, the compressor operates. There must be a problem in the control circuit to the relay. What could be the problem? I cannot find broken wiring.
The environmental control is electronic. All heat functions work properly.
Any ideas?
May 11, 2007.

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