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Vlotage problem

Tiny
GREASENUT22
  • MEMBER
  • CHEVROLET SILVERADO
1994 chevy truck 118,000 miles my voltage gauge drops to 10-11 volts when sitting still with it in gear
give it some gas and the voltage gauge comes up yo 14 volts, only does this when I have both the blower motor and headlights on, has new alt, blower motor and belt tensoner
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Friday, March 2nd, 2007 AT 10:17 PM

6 Replies

Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
Hi
i would check your grounds brom the battery first, and make sure the cables arent corroded and get back to us

jim
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Friday, March 2nd, 2007 AT 10:25 PM
Tiny
GREASENUT22
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  • 4 POSTS
I checked all the grounds all are good, hooked up volt
meter to battery and drove around, while watching the volt meter it starts out at 14.5 volts and drops to 11 volts with the headlights and heater blower
motor running, my battery is wet on the outside
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Monday, March 5th, 2007 AT 4:55 PM
Tiny
CHEVY22
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IF ITS LEAKING REPLACE IT

JIM
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Monday, March 5th, 2007 AT 7:54 PM
Tiny
GREASENUT22
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It's not wet like it is leaking, I mean wet or damp with battery acid on top, do you think it could be the
battey has a bad cell in it, I tested the battery at work with are midtroics battery and charging tester
and it keeps saying it is ok, battery fluid level is alwasy full to
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Monday, March 5th, 2007 AT 9:58 PM
Tiny
CHEVY22
  • MECHANIC
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I wonder since you replaced the blower, alt and belt and battery checks out if the headlight switch my have a bad ground internally

the midtronics testers are about the best around especially the grey model with the blue stripe

jim
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Tuesday, March 6th, 2007 AT 6:49 AM
Tiny
GREASENUT22
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If I turn just the blower motor off the voltage will
come up to 13 volts, or if I turn off just the headlights the voltage comes up to 13 volts, it doesn't matter whitch one I turn off the voltage comes back up, it only does it with both on. Now a new problem is showing up, the rpm's jump and feels like the engine's dieing, it stalled on me today and started back up

Give me a truck diesel and I can fig it out, but come to auto's and I;m stumped!

Jeremy
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Tuesday, March 6th, 2007 AT 4:47 PM

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