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Old 07-01-2011, 09:09 AM
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amp gauge

1999 chevy tahoe 5.7 2wd automatic vortex.

new battery & amp gauge needle barely moves. Somebody told me it might be the spider sensor or module or whatever it's called What is it,how does it work,& where can I locate it?
Another suggestion was,a bare wire or an electrical connection is not making full contact or something is not connected that is supposed to be connected??
I do not have access to a lot of tools or devices for trouble shooting this problem.
Also,there is an electrical harness right above the harmonic balancer & is grounded to a threaded stud grounded to the engine block & the negative battery cable is also grounded to the same stud!? Is thyis ok,or,should I ground the negative cable somewhere else?
thanks for any help.

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Old 07-01-2011, 09:25 AM
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On that new of a vehicle for all later model vehicles the factory volt gauges are "dummy" gauges, they will go high and low but are regulated so if its within a "normal" reading it won't move during normal operation. not sure what year they stoppee putting amp gauges in vehicles but everything ive seen after 1975-1980 are all volt meters.
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Old 07-01-2011, 09:49 AM
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amp gauge

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Originally Posted by Mach1460
On that new of a vehicle for all later model vehicles the factory volt gauges are "dummy" gauges, they will go high and low but are regulated so if its within a "normal" reading it won't move during normal operation. not sure what year they stoppee putting amp gauges in vehicles but everything ive seen after 1975-1980 are all volt meters.
It might be a volt meter.
All I know is when the tahoe was running,it would be in the middle,now,it barely moves.Even before in the cranking mode it would be in the middle.
thanks again.
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Old 07-01-2011, 10:00 AM
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Oh your saying its on the very low side of the gage, does the tahoe run ok? Are the lights dim?
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Old 07-01-2011, 10:06 AM
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amp hauge

The needle will not move from the left side (bottom low).
All it does is vibrate very,very little.
The engine will crank but not run.
I was told it might be the fuel pump,but,when the key is turned to the on position,the needle should be towards the middle.
How can the fuel pump affect the needle gauge!? All the electrical components work fine,lights,horn,wipers,etc.
Thanks again.
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Old 07-01-2011, 11:52 AM
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It could be a lot of things, you will need to focus on one problem at a time and not hop all over the place. Like the engine turning over, not starting that seems to be the most important problem at hand. I might want to fix my own cavity but I would go to a dentist cause I have no clue how to do that. All grounds are the same and all connect to the - side of the battery, electrically.
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Old 07-01-2011, 12:00 PM
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Have a friend smack the fuel tank with a rubber mallet while you try to start it. Some times it will jar the pump enough to start. If it starts then the fuel pump or wiring is your problem. If it does not start get/rent/borrow a fuel pressure tester. The pump may be completely dead.
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