Weird voltage hiccup

[JJSIX]

I got a '99 with the 4 angry squirrels and I'm having a weird hiccup with the battery gauge. When I turn her on before starting it show s 12 volts just like she's supposed to. After starting the engine it stays there but then drops after about 1 minute all the way to the left side of the gauge where it holds 9 volts.

When I turn off the Jeep then turn it back on the gauge will again read 12 volts and it starts just fine.

I checked the battery and test is good. Any idea what I should be looking at cuz the check gauge is lit and I like my gauge to work.

 

[NskLJ]

I got a '99 with the 4 angry squirrels and I'm having a weird hiccup with the battery gauge. When I turn her on before starting it show s 12 volts just like she's supposed to. After starting the engine it stays there but then drops after about 1 minute all the way to the left side of the gauge where it holds 9 volts.

When I turn off the Jeep then turn it back on the gauge will again read 12 volts and it starts just fine.

I checked the battery and test is good. Any idea what I should be looking at cuz the check gauge is lit and I like my gauge to work.

Start with a voltmeter at the battery or the alternator to see if it is the charging system or the gauge that is the issue.

 

[JJSIX]

Start with a voltmeter at the battery or the alternator to see if it is the charging system or the gauge that is the issue.

11.8V at the battery, no change when running, new alternator on order

 

[macleanflood]

https://wranglertjforum.com/threads...rnator-into-your-jeep-wrangler-tj.3979/page-6