Intermittent low voltage on 91 Cherokee
10-15-2003, 10:04 PM
#1
Guest
Posts: n/a
Intermittent low voltage on 91 Cherokee
The dash voltage gauge will read between 10-14 volts unpredictably.
When it reads low, the fuel gauge reads low, the oil pressure reads
lower, the temp higher. Sometimes this happens while driving; at the
start of the trip, the gauge reads a normal 14 volts, but drops after
a while.
I'm suspecting a relation to the engine compartment temp, the higher
the ambient temp, the lower the reading on the volt gauge. I see no
effect on other elec. components, no dimming of lights etc.
Could this be a bad connection at the fuse block?
Does the connector to the fuse block pull off from the engine
compartment side of the firewall?
thanks
DH
When it reads low, the fuel gauge reads low, the oil pressure reads
lower, the temp higher. Sometimes this happens while driving; at the
start of the trip, the gauge reads a normal 14 volts, but drops after
a while.
I'm suspecting a relation to the engine compartment temp, the higher
the ambient temp, the lower the reading on the volt gauge. I see no
effect on other elec. components, no dimming of lights etc.
Could this be a bad connection at the fuse block?
Does the connector to the fuse block pull off from the engine
compartment side of the firewall?
thanks
DH
10-16-2003, 01:31 AM
#2
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
I can't say for sure about your XJ, but many vehicles have a separate
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
10-16-2003, 01:31 AM
#3
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
I can't say for sure about your XJ, but many vehicles have a separate
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
10-16-2003, 01:31 AM
#4
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
I can't say for sure about your XJ, but many vehicles have a separate
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
voltage regulator for the cluster gauges. This insures they will read true
when system voltage varies for any reason. I don't if it is replaceable or
if you would have to change the whole cluster.
Joe, 90XJ
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
>
> I'm suspecting a relation to the engine compartment temp, the higher
> the ambient temp, the lower the reading on the volt gauge. I see no
> effect on other elec. components, no dimming of lights etc.
>
> Could this be a bad connection at the fuse block?
> Does the connector to the fuse block pull off from the engine
> compartment side of the firewall?
>
> thanks
> DH
10-16-2003, 09:32 PM
#5
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
It's always that damn ground wire, the braid from
the back of the block to the firewall. Check it.
__
Steve
..
10-16-2003, 09:32 PM
#6
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
It's always that damn ground wire, the braid from
the back of the block to the firewall. Check it.
__
Steve
..
10-16-2003, 09:32 PM
#7
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
"dh" <dhoover@worldnet.att.net> wrote in message
news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> The dash voltage gauge will read between 10-14 volts unpredictably.
> When it reads low, the fuel gauge reads low, the oil pressure reads
> lower, the temp higher. Sometimes this happens while driving; at the
> start of the trip, the gauge reads a normal 14 volts, but drops after
> a while.
It's always that damn ground wire, the braid from
the back of the block to the firewall. Check it.
__
Steve
..
10-17-2003, 10:19 AM
#8
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
Stephen Cowell wrote:
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
10-17-2003, 10:19 AM
#9
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
Stephen Cowell wrote:
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
10-17-2003, 10:19 AM
#10
Guest
Posts: n/a
Re: Intermittent low voltage on 91 Cherokee
Stephen Cowell wrote:
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
>
> "dh" <dhoover@worldnet.att.net> wrote in message
> news:gourovkui3si8uclf50e14q4d21gtvmfiq@4ax.com...
> > The dash voltage gauge will read between 10-14 volts unpredictably.
> > When it reads low, the fuel gauge reads low, the oil pressure reads
> > lower, the temp higher. Sometimes this happens while driving; at the
> > start of the trip, the gauge reads a normal 14 volts, but drops after
> > a while.
>
> It's always that damn ground wire, the braid from
> the back of the block to the firewall. Check it.
> __
I will second that!
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
