Am I charging?

Reply Subscribe

Thread Tools

Search this Thread

Oct 28, 2011 | 10:37 PM

#16

DFlintstone

CF Veteran

Joined: Aug 2011

Posts: 10,489

Likes: 24

From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

Charging at 13.8 was normal for generators. Alternator should level off more like 14.8. Over 15 you have battery issues like too much boiling.

Oct 28, 2011 | 10:44 PM

#17

Outlaw Star

CF ADMIN

Joined: Sep 2010

Posts: 34,088

Likes: 257

From: Lantana, Fl

Year: 1996

Model: Cherokee (XJ)

Engine: 4.Slow

Quote:

Originally Posted by Metalgearmurder

Easy test to see if your alt is operating is take a long extension or wrench and hold it close to the back of the alt. if the alt is charging correctly it will have a magnetic charge and pull the wrench or what ever into it. If it doesnt have that pull then the alt is dead. if it does and your still dropping off then your have a loose connection.

Old skool tricks! Glad im not the only one who still uses em!

Oct 28, 2011 | 11:13 PM

#18

pickles

Senior Member

Joined: Jun 2010

Posts: 703

Likes: 4

Year: 1993

Model: Cherokee

Engine: 4.0

I've been having a similar problem for over a year now, cant figure it out. Even swapped in a 136A alternator, didn't fix it.

Going to re-check all connections/grounds again tomorrow..

Oct 28, 2011 | 11:20 PM

#19

Outlaw Star

CF ADMIN

Joined: Sep 2010

Posts: 34,088

Likes: 257

From: Lantana, Fl

Year: 1996

Model: Cherokee (XJ)

Engine: 4.Slow

Quote:

Originally Posted by Programbo

Not sure about that. I work in a truck parts store and sell batteries daily and we always check them all before we let someone take them and they normally test in the mid 12 volt range.

Correct. Usually they should be about 12.5 to 13v being new and around 13-16 while the vehicle is running cause the alternator is charging.

Oct 29, 2011 | 12:32 AM

#20

Delta

CF Veteran

Joined: Jun 2011

Posts: 1,958

Likes: 0

From: Norfolk, Va

Year: 1996

Model: Cherokee

Engine: 4.0 ho i6

I had 3 mechanisms tell me my alternator was fine because it was charging at the right voltage and no one believed me that amperage is the important factor until I got it load tested at auto zone it was giving me enough power to run the car and accessories but it would very slowly drain the battery. I had a good friend and mechanic help me change it out in my schools parking lot

Oct 29, 2011 | 04:20 AM

#21

LegalizeFreedom

Member

Joined: Jul 2011

Posts: 120

Likes: 0

From: Ohio

Year: 2000

Model: Cherokee

Engine: 4.0

double check that ground strap from the back head bolt to the firewall, its the engine block ground, and its your alternators main grounding point to your batt and everything really. Check ohms/resistance, from neg on batt to back head bolt. Should be 0.