normal voltage

[cinema]

1996. I'm pulling these readings from the OBD2

I put in a new alternator (stock replacement). With headlamps and blower going it will can below 13.5 at idle. 13.7-13.8 when i'm just riding along with not much going on. radio/dash backlight dims when turning on accessories. idles nice and rough initially when i turn on the blower but seems to even out in a few moments.

normal?

both new and old alternators tested good on the bench. is this just the state of things on these trucks? finding out more as I daily this XJ while my prius is out indefinitely.

 

[cinema]

ps even while pulling 1500 rps the voltage struggles to sit at 13.5 with blower/lamps on. but eventually it will settle there.

battery tests good i think, 12.4-12.7 car off depending how long it's been sitting

 

[Tim_MN]

Most alternators do not put out their maximum capacity at idle. A properly functioning alternator should output 13.8 - 14.4 volts at +1500 rpms.

 

[lawsoncl]

You're measuring at the battery and not looking at the dash, right?

 

[old_man]

Don't worry, your numbers are fine and normal.

 

[devildog0]

Probably wouldn't hurt to go though and replace your battery and ground cables.

 

[cinema]

Probably wouldn't hurt to go though and replace your battery and ground cables.

I think you're right. just been avoiding it. the battery is kind of new 48 months maybe, but the cables are 23 years young.

I will also tighten the belt slightly, once in a blue moon the ps pump will slip in reverse, not sure if it's due to low voltage/idle in reverse or belt stretch.

 

[lawsoncl]

I think you're right. just been avoiding it. the battery is kind of new 48 months maybe, but the cables are 23 years young.

I will also tighten the belt slightly, once in a blue moon the ps pump will slip in reverse, not sure if it's due to low voltage/idle in reverse or belt stretch.

Why not pickup the Kricket tool and set the tension properly?