Charging problem 90 XJ
#81
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
#86
Guest
Posts: n/a
Re: Charging problem 90 XJ
Try the voltage difference from the alternator positive wire/bolt to the
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
#87
Guest
Posts: n/a
Re: Charging problem 90 XJ
Try the voltage difference from the alternator positive wire/bolt to the
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
#88
Guest
Posts: n/a
Re: Charging problem 90 XJ
Try the voltage difference from the alternator positive wire/bolt to the
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
#89
Guest
Posts: n/a
Re: Charging problem 90 XJ
Try the voltage difference from the alternator positive wire/bolt to the
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks
battery negative for a reading to compare with battery post to post
reading.
This will tell you how much drop is in the positive line connections
better. I then walk the meter back while holding the meter on battery
negative. I go from alternator post, to the alternator wire eye loop,
then to the copper in the wire, then to the relay eye loop, then the
relay bolt, then the battery positive cable clamp, then the post itself.
Are you in the rust belt? I find some cables just up and crystallize,
especially that mesh strap from the rear of the engine head to the
firewall.
One other place to check for a bad ground is on the passenger side of
the engine at the back. There is a bolt there with a mess of small
wires hooking to it.
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:
>
> I figured since there was only a difference of .05v between the relay
> post and the alt post continuity was ok. I am going to install new
> battery cables tonight. Thanks