Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Check fuse 10A under the hood to be sure the fuse is in place and has battery voltage on both sides. If the fuse is blown or missing, replace the fuse and recheck operation. Verify the idle speed control is operating as it should. If the fuse blows, disconnect the A/C compressor clutch and recheck operation. If the problem is still present, remove the Black/Yellow (BK/YE) wire from pin 6 of connector C270a at the interior fuse panel and recheck operation. If the problem is gone, suspect that the compressor clutch diode is shorted. The diode is part of the interior fuse panel so replacing the fuse panel is required. If the fuse no longer blows with the compressor disconnected, replace the shorted compressor clutch. If the fuse still blows with the A/C compressor disconnected, disconnect the IACV and recheck operation. If the fuse no longer blows, suspect a shorted IACV.
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