Charging problem 90 XJ
#71
Guest
Posts: n/a
Re: Charging problem 90 XJ
For starters you have bad/dirty battery connections according to those
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
#72
Guest
Posts: n/a
Re: Charging problem 90 XJ
For starters you have bad/dirty battery connections according to those
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
#73
Guest
Posts: n/a
Re: Charging problem 90 XJ
For starters you have bad/dirty battery connections according to those
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
readings. A no load volt drop of .03V is significant, then the neg drop
of .04V, well.....
All the readings like the alternator post to case (12.56) and battery
post to battery post (12.61) must be equal with no load.
Did you ever try my ground jump suggestions? You 'sure' have the
symptoms of a dead connection.
Without the proper ground path, the alternator will not turn on.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> JRK58@MSN.COM wrote:
> > The battery had a full charge when the volt meter (thought it was an
> > amp gauge) dropped from 14 to 12 or less. Actually it was charging
> when
> > I parked it and not charging the next time I started it. Thanks
>
> Well I purchased a volt meter today and here is what I found.
>
> Batt. Post to post 12.61
> Batt to relay stud 12.58
> Alt post to case 12.36 running
> Alt post to case 12.56 off
> Yellow alt wire key on 12.23 key off 0.0
> Tan/Black alt wire 0.0 key on 0.0 running
>
> I have traced the Tan/blk wire 2 plugs back and get 0 volts. What
> should this wire be reading? If it should be hot like I think it does
> where does it go? Any help will be greatly appreciated. Thanks
#78
Guest
Posts: n/a
Re: Charging problem 90 XJ
You 'cannot' have tight clean battery cables with the volt drops you are
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John
#79
Guest
Posts: n/a
Re: Charging problem 90 XJ
You 'cannot' have tight clean battery cables with the volt drops you are
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John
#80
Guest
Posts: n/a
Re: Charging problem 90 XJ
You 'cannot' have tight clean battery cables with the volt drops you are
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John
reporting, something is not letting the power pass cleanly. This drop
'will' affect your charging to some degree if it isn't the cause of all
the trouble.
Have you tried the meter on continuity to see if it will beep from the
battery positive to the alternator positive? There is a fuse link
between them that blows.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JRK58@MSN.COM wrote:
>
> Yes I jumped from alt case to battery neg., block to battery,firewall
> to block and to battery. Battery cables have tight clean connections
> but are old. Thanks........John