Fluctuating voltage at start up?
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Junior User
Joined: Jun 2012
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Fluctuating voltage at start up?
This just started a couple days ago on my OBS.. After startup, immediately the voltage needle starts jumping then is stops after a few minutes.. Anyone run into this?
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
Normally, erratic behavior is an early sign of a failing alternator (diode failure for example).........but it also may be belts, int or ext reg, wiring, battery condition, etc........best to work the simple maintenance fixes first (tighten belts, clean battery terminals/cables, etc)...
Thread Starter
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Junior User
Joined: Jun 2012
Posts: 72
Likes: 0
Normally, erratic behavior is an early sign of a failing alternator (diode failure for example).........but it also may be belts, int or ext reg, wiring, battery condition, etc........best to work the simple maintenance fixes first (tighten belts, clean battery terminals/cables, etc)...
Fleet Mechanic
Joined: Feb 2007
Posts: 1,652
Likes: 79
From: Mooresville, NC
You can do a quick check of the alternator's internals if your DVM has a Diode Check function..........
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