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Author Topic: System Voltage Test  (Read 24338 times)

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Location: Fort Lauderdale area
Posts: 11334

« on: March 07, 2008, 11:08:20 pm »

Note: This is not Verado stuff and applies to any system/motor

VOLTAGE TEST - do this test with your engines off but ignition on....It's the "resting" voltage that matters - not the charging voltage (when running). IF THE MOTORS ARE RUNNING YOU ARE TESTING THE CHARGING SYSTEM, NOT THE BATTERIES. WITH THE ENGINES OFF, YOU ARE TESTING THE BATTERIES. And verados running showing 14.2 but having low batts will still throw alarms/DTS problems.Turn on the ignition and get the voltmeter showing on the tach - now use something that is a heavy load, a windlass for 10 sec or trim the motor(s) up & down...wait 10 min and read the voltage: Here's where they should be:

our experience is anything below 12.2 causes problems and false alarms... and if they are flat -less than 11.8- you have partially damaged them, and they'll never come back 100%. They WILL fail unexpectedly in the future - replace them.

Mine are on a charger 24/7 when the boat is not moving. and never come off 12.6, no matter what...

Do yourself a favor and replace your batts with AGM types and you'll never worry about this stuff.....
« Last Edit: January 01, 2011, 09:28:49 pm by Glen » Logged

Welcome! Please search First, no problem is really new, also motor year and hours when posting
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