Thread: gryphon did not come up when i started my truck
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Old Fri, April 9th, 2010, 02:13 PM
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Jackpine Jackpine is offline
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Originally Posted by cody994x4 View Post
thankx jack...yea im gonna switch one of the pids to batt voltage ltr today...my battery is from like 06 so yeah.

how would i perform a load test?
You probably can't do a "load test" - it takes special equipment. A store like Autozone will generally do one for you for free though. (You don't HAVE to buy a battery from them if your battery fails). My guess is, your battery IS weak.

Monitoring the voltage on the Gryphon will tell you a lot about your charging system, but not much about the battery. If you see readings of 13.9-14.1V when driving, the charging system is fine. I monitor my battery voltage all the time for this reason. A big electrical load will drive the charging voltage lower. When I tow with two additional batteries in my trailer to keep charged and an electric refrigerator, I regularly see 13.6-13.8V.

- Jack