Battery light on

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BusterBus

Active member
Joined
Apr 7, 2010
Posts
32
On a recent trip my battery light on the dash came on.  I started slowing down and it went off.  The volt gauge would show less
than normal as the rpm's went up but would increase to almost normal as the rpm's went down.  Fearing total battery discharge
I started the generator to hopefully keep the batteries charged.  When I started the generator the volt gauge would return to almost
normal.  I continued on to my destination without any problems, no battery light on and full running lights on.  I have a 2002 Allegro Bus with a 330 Caterpillar engine.  Any ideas on the problem and any solutions.
 

BusterBus

Active member
Joined
Apr 7, 2010
Posts
32
Clarification on above post:  Engine is a 3126 Caterpillar with 330 hp on a Freightliner Chassis.
 
W

Weewun

Guest
Don't rule out a loose belt.  Increasing the RPM increases the charging voltage, hence additional drag of the Alternator, also running the Genny powers the converter thus supplying charging current to the batteries requiring less from the Alternator (less drag on the belt). 
 
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