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1995 Isuzu Rodeo Question Fluctuating voltage

Tiny
V-STAR07
  • MEMBER
  • 1995 ISUZU RODEO
Electrical problem
1995 Isuzu Rodeo Question 6 cyl Four Wheel Drive Manual

I have replaced the alternator & I have a new battery. The voltage gauge reads about 12 volts when the truck is idling. When I push the acceleator the voltage goes up to about 16 volts. When I am driving down the road the voltage gauge goes back and forth between 12 & 16 volts and affects the way the truck runs. Also if I use the A/C, power windows, headlights, etc. The voltage is pulled down below 12 volts.
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Sunday, August 29th, 2010 AT 6:05 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Get the alternator load tested if okay-inspect and test wiring and also the charge relay in the fuel/relay box
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Monday, August 30th, 2010 AT 3:09 AM
Tiny
ROB KANDUTH
  • MEMBER
  • 10 POSTS
I had a similar thing happened to me after going back to where I bought the alternater like six times with nothing wrong with it I had a wiring fire it turned out the alternator was in the wrong box for my truck or I have seen a short in the fuse boxes do it to or bad ground
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Monday, August 30th, 2010 AT 4:08 AM

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