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E36 General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.

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Old 01-21-2013, 10:48 PM   #1
mackmaggiesam

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Angry voltage problem

i have a 1994 325i runs great until you turn blower motor on high or rear defrost on then it will start to bog down and red engine light comes on i checked to see if there was 5 volt going to sensor i got it check alter getting 13.2 does anybody know what this is it is also blowed ac relay and fuse but compressor is good please help driving me crazy:
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Old 01-22-2013, 10:28 AM   #2
Big Evil
 
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Check grounds in the system, 13.2 seems a bit low but not out of range for normal, do you have an amp clamp to check the alternator amp output? (Voltage may be ok but not enough amps)
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Old 03-31-2013, 05:17 PM   #3
David Mc
 
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+1 Sounds like the alternator output is at rock bottom.
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