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1999 Volvo S70 Question: LOSS OF POWER TO A/C, RADIO,POWER WINDOWS AND FANS WITH ENGINE START UP

 

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Visitor, 2.4L 5 Cylinder, Baltimore, MD, May 29, 2011, 07:51

PROBLEM HAS OCCURRED TWICE IN PAST TWO WEEKS. STARTED AND DROVE CAR WITHOUT PROBLEM 30-50 MILES. PARKED ON LOT. AFTER SEVERAL HOURS RESTARTED CAR BUT AT THAT TIME AIR CONDITIONER, POWER WINDOWS, RADIO AND FANS DID NOT WORK. FIRST TIME SAT WITH ENGINE RUNNING AND AFTER ABOUT 10-15 MINUTES ALL POWER SPONTANEOUSLY RESTORED (AM NOT SURE IF TRIED TO TURN IGNITION OFF AND ON INITIALLY. IF I DID, THERE WAS NO CHANGE). SECOND TIME, TWO WEEKS LATER WITHOUT INTERIM PROBLEM, STARTED CAR WITHOUT PROBLEM, DROVE TO
40 MILES AND PARKED ON OPEN LOT, AFTER SEVERAL HOURS RETURNED TO CAR AND STARTED ENGINE WITH SAME PROBLEMS- AIR CONDITIONER, POWER WINDOWS, RADIO AND FANS DO NOT WORK . OUTSIDE TEMP IN 90'S. DROVE TO COVERED LOT (10 MINUTES), SAT WITH ENGINE RUNNING (TOTAL TIME ABOUT 30 MINUTES) WITH NO CHANGE. TURNED IGNITION SWITCH NOT ALL THE WAY OFF-CAUSED AN ENGINE "FLUTTER" SENSATION AS EXPECTED WHEN IGNITION IN IN BETWEEN STAGE - AND THEN SPONTANEOUSLY IMMEDIATELY ALL POWER RESTORED (A/C, RADIO AND FANS TURNED ON AT ONCE AND WINDOW POWER WORKED. THEN TURNED IGNITION ENTIRELY OFF AND THEN ON WITHOUT PROBLEMS. LET CAR SIT FOR FEW HOURS UNTIL TEMPS OUTSIDE LOWERED. RESTARTED CAR AND DROVE HOME WITHOUT INCIDENT. NEXT DAY DROVE WITHOUT INCIDENT (WITH WINDOWS OPEN JUST IN CASE).
THIS IS A NEW PROBLEM.

2ND PROBLEM. (RELATED OR UNRELATED?)
OLD PROBLEM-YEARS. SPORADICALLY (AT VARYING INTERVALS-CAN BE WEEKS OR MONTHS) WITH FIRST OF THE DAY ENGINE START UP FIND TOTALLY DEAD BATTERY RESTORED WITH HOT SHOT. CAN THEN IMMEDIATELY TURN OFF AND THEN RESTART ENGINE WITH FULL POWER. NO OBVIOUS SOURCE OF BATTERY DRAIN (LOOKED FOR ANY VISIBLE SOURCE-FOUND NONE). NOT RELATED TO TIME SITTING. REPLACED BATTERIES MULTIPLE TIMES AT RELATIVELY SHORT INTERVALS, REPLACED CABLES BUT PROBLEM PERSISTS. DEALER SERVICE CAN NOT FIND CAUSE.

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  • Answer #1

    Bret Bodas from RepairPal Test Shop, June 26, 2011, 11:28
     Master

    The first problem is most likely a bad ignition switch. Also, have the B+ battery cable looked at. An experienced Volvo tech will know exactly what to look for. Both these repairs are relatively inexpensive, probably around $300-350

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