1984 GMC C1500
195,000 MILES
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why would my heater motor and speedometer stop working at the same time
Jan 16, 2013 at 11:09 PM
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ASEMASTER6371
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different circuits.

check all fuses with a test light. tap on the blower to see if the motor is bad,

i believe in 84, your speedo is cable controlled. check all cables for any breakage

Roy

Jan 17, 2013 at 3:13 AM