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Unread 11-24-2012, 07:44 PM   #16
Grenjeepgreen
Registered User
1995 ZJ 
 
Join Date: Sep 2012
Location: Madison, Mississippi
Posts: 23
Not sure about the alarm but I just went and got a new battery and they tested the old one and said it was dead but he said to check my alternator. I don't have tags or insurance on the jeep yet so can I check it my self with a voltmeter ?

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Unread 11-29-2012, 11:19 PM   #17
WesleySands
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1996 XJ Cherokee 
 
Join Date: Nov 2012
Location: Fairfax, VA
Posts: 30
Sorry for the late response, its been hectic the past few days. With your engine off you should have a battery voltage of around 12.4 to 12.6 (this is according to Haynes) when the engine is running, the voltage should be greater, but not more than 15 volts. (again so says Haynes)

I would check all of the alternator wiring, making sure its in good condition, also in what condition are the belts that attach to the alternator? I hope this helps.
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Unread 01-22-2013, 01:40 PM   #18
Grenjeepgreen
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1995 ZJ 
 
Join Date: Sep 2012
Location: Madison, Mississippi
Posts: 23
Ok I'm sorry also for the late response I been trying to get all the parts I need and a new multimeter. I hooked it up and with engine off it says 12.66 12.67. Started the engine and it stayed at 14.66 14.67. Is the alternator good or bad any input appreshiated.
Also wiring looked good cant visually see anything wrong and the belt looks good.
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Unread 01-22-2013, 02:17 PM   #19
txbass06
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1998 ZJ 
 
Join Date: Dec 2012
Location: Texarkana, Texas
Posts: 602
If the alternator is charging at 14.6 then you're good on that part
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Unread 01-22-2013, 02:26 PM   #20
Grenjeepgreen
Registered User
1995 ZJ 
 
Join Date: Sep 2012
Location: Madison, Mississippi
Posts: 23
Thank you very much I also just need to know if I have another problem. I think it's just the ecu re learning everything from the battery being disconnected for over a week but when I start the jeep it idles at 2000 maybe a little less or over is that bad or is it just what I said ?
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Unread 01-22-2013, 02:33 PM   #21
txbass06
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1998 ZJ 
 
Join Date: Dec 2012
Location: Texarkana, Texas
Posts: 602
Not sure on that one but I had a '97 ram that would lose its idle if I disconnected the battery. Took it a day or so of normal driving to relearn
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Unread 06-18-2013, 11:04 PM   #22
Grenjeepgreen
Registered User
1995 ZJ 
 
Join Date: Sep 2012
Location: Madison, Mississippi
Posts: 23
Thanks to everyone who helped I finally got my jeep running and everything is good except code 21 o2 sensor. So I looked high and low on the forum for how to replace it and I just can't get to the connection above the transmission. Also since its a 95 5.2L v8 it should only have 1 right? But I took it to a shop and they are trying to tell me it has 4 to 6 o2 sensors. That can't be right right? If someone could let me know and also could I just cut the wires and splice the new sensor wires to the old wires from the connector? If that makes sense.
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Unread 06-18-2013, 11:21 PM   #23
jm8881
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1996 ZJ 
 
Join Date: Oct 2005
Location: , California
Posts: 454
You don't want to cut and splice o2 wires. The change in resistance from splicing them will effect things negatively. Also being a 95 I'm almost positive it only has 1 o2 sensor before the catalytic converter.
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Unread 06-19-2013, 12:33 PM   #24
PolkaPower
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1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss, Italy
Posts: 16,502
Quote:
Originally Posted by Grenjeepgreen View Post
Thanks to everyone who helped I finally got my jeep running and everything is good except code 21 o2 sensor. So I looked high and low on the forum for how to replace it and I just can't get to the connection above the transmission. Also since its a 95 5.2L v8 it should only have 1 right? But I took it to a shop and they are trying to tell me it has 4 to 6 o2 sensors. That can't be right right? If someone could let me know and also could I just cut the wires and splice the new sensor wires to the old wires from the connector? If that makes sense.
You have one O2 sensor in the pipe. Do not return to that shop.
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Unread 06-19-2013, 12:56 PM   #25
dellis
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1998 ZJ 
 
Join Date: Feb 2013
Location: Vienna, VA
Posts: 313
Quote:
Originally Posted by jm8881 View Post
You don't want to cut and splice o2 wires. The change in resistance from splicing them will effect things negatively.
Cutting and splicing an O2 wire will not create any significant resistance change. It would be a hassle to do it in such a way so as not to create problems in the future (corrosion, disconnects, etc), but resistance is not a concern.
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