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 |
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 |
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 |
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 |
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 .. |
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 .. |
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 .. |
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 |
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 |
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 |
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