Gauge's only work when horn is activated.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thread Starter
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
yeah, I found those pics in a ground thread on NAXJA, and used it to clean/freshen up all my engine bay grounds. I could never find G108 though, I couldn't find a accurate description of where to look. while my dash was apart, I looked all over near the headlamp switch, but never found it.
I will check it out tomorrow after work.
I will check it out tomorrow after work.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thread Starter
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
Sounds like a classic clockspring issue.
You can isolate the source of the 12 volts by removing the horn relay in the Junction Block (in the passenger footwell).
You need to remove the cover off the JB to get at the horn relay.
After removing the horn relay, check the voltage at the TPS again. If it dropped to around 5 volts, consider the clockspring bad. If the voltage remains at 12 volts there's another short somewhere that needs to be chased down.
If it is resolved the the horn relay dropped the voltage to 5 volts (normal) the horn relay can be left removed until you line up a clockspring and replace it. They come in different flavors so if you have cruise control, a new one will cost a few bux more.
You can isolate the source of the 12 volts by removing the horn relay in the Junction Block (in the passenger footwell).
You need to remove the cover off the JB to get at the horn relay.
After removing the horn relay, check the voltage at the TPS again. If it dropped to around 5 volts, consider the clockspring bad. If the voltage remains at 12 volts there's another short somewhere that needs to be chased down.
If it is resolved the the horn relay dropped the voltage to 5 volts (normal) the horn relay can be left removed until you line up a clockspring and replace it. They come in different flavors so if you have cruise control, a new one will cost a few bux more.
I removed the horn relay. the gauges work as normal now, no more "no bus", no "check engine" and no more "airbag"....everything works perfect except the horn (because the relay is out)
I still get 14V at the TPS with the key on though...
G108 looks fine, its tight.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Does your engine run okay with the horn relay removed? Transmission shift okay.
Thread Starter
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
It's odd that you would have 14 volts at the TPS (Orange wire connector pin cavity). That's not even battery voltage, more like alternator output voltage. Are you checking it with key to RUN, engine not runnng?
Does your engine run okay with the horn relay removed? Transmission shift okay.
Does your engine run okay with the horn relay removed? Transmission shift okay.
yes, I am checking voltage with the key on, no engine running.
the engine runs perfect, and the transmission behaves perfectly.
with the horn relay removed, the truck is behaving perfectly. no check engine lights, nothing.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Cheers
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thread Starter
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
ill order a clockspring tomorrow. thank you for the help.
I also have new 4AWG battery cables from 5-90, and a new battery going in soon, alternator shortly after those.
then its back on track for wheels/tires...haha.
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