Question about 1998 Jeep Grand Cherokee

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Immediate drop in voltage on the voltage gauge

When driving my warning light, "check dash gages" came on with a dring. My voltage gauge had dropped to zero. When I turned the Jeep off turned the key to the on position, the power level came up about a quarter of they way. Restarted the Jeep and after a minute or so it immediately dropped to zero accompanied by the warning light and a ding.

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M.B. Nataraj

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  • 97 Answers

Dynamo belt broken?

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SOURCE: Oil pressure Gauge drops to

Change your oil pressure sending unit? it wouldn't be my first.

Posted on Aug 28, 2008



  • 4 Answers

SOURCE: Voltage Gauge drops suddenly to zero

Charging system grounding out, poss inside alternator

Posted on Jan 31, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: Oil pressure gauge drops after running and sitting still

The Oil pressure sensor seams to have gone bad and needs to be replaced soon as possible as they tend to leak oil soon after. There common to go bad and start with that since it's easier then replacing the oil pump, but if you don't hear any ticking from the engine and you have good pressure when the engine is cold then it's the sensor. 
The 4 cylinder oil pressure switch is located below the A/C compressor. It is a single wire connection with a gray/yellow striped wire. 

The 6 cylinder oil pressure switch is located on the passenger side rear of the block. It is a single wire connection with a gray/yellow striped wire. 

Good luck and hope this helps. 

Posted on Jul 01, 2009


  • 115 Answers

SOURCE: I'm receiving a check gauges warning light on my 00 Jeep Grn Cher

This might be a result of an oxygen sensor. If you take the vehicle to a store like autozone, they will attach a diagnostic sensor to your vehicle at no charge, and then reset the unit, and be able to tell you what is going on. This is at no charge, so there is nothing to lose. I hope this helps.

Posted on Aug 05, 2009


  • 295 Answers

SOURCE: oil pressure gauge goes up when car started, but then down to 0

u Have a problem with the oil sending unit. The sensor is located beack right side of the engine block. Take out the switch and make sure u have good oil PSI. Should be 6 psi at idle and around 50 at 4000 RPM. If the presure is ok replace the switch they are very cheap about 20 bucks. Please rate.

Posted on Aug 12, 2009

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Hi Scott, Im glad to help!

Normally when the gauges drop to zero its because something is bringing down the BUS Circuit. To understand whats going on we need to find out if there are any codes in the system. Have the codes checked and repost here so I can help you further. Hope this helps and have an awesome day Scott.

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