What might cause my gauges not to work properly in my 2004 Chevy Trailblazer

Asked by Dec 11, 2013 at 07:50 PM about the 2004 Chevrolet TrailBlazer LS

Question type: Maintenance & Repair

None of the gauges in my car work. When I turn on the care they will move and then go
back to 0. The only gauge that seems to work is the gas gauge and the thermostat.

6 Answers

...yes reduced or NO ground potential to the chassis...this connection comes off of the NEGATIVE battery cable and ends up at a ground lug...this ground lug is covered in corrosion from repeated high-amperage starts~ you MUST disassemble this connection and wirebrush both the lug and the chassis to assure 300 cold cranking amp potential and to provide NEGATIVE to the dashboard and it's components...kinda surprised that the CEL did not come on because under reduced power/ground potential these brain-boxes lose track of the sensor data and go into a kind of "fail safe" mode what keeps the engine running...brain-dead~....so in summation, wirebrush the 1/0 cable end and chassis and re-assemble them with a NEW battery as they get old quick with NO LEAD in them anymore~...you can test the ground at the dashboard...check for 12.5 unwavering volts~

8 out of 8 people think this is helpful.

...also relays will sporatically drop out...in other words, the ignition relay suffers from an undervoltage condition and drops out and then the ignition is dead...same for the fuel pump....they aren't failing to do their job....they just cannot get to ground...electronics Par-Broil themselves when NO ground is at hand~

2 out of 2 people think this is helpful.

your fuel gauge has a REGULATED (of it's own regulator) variable resistor...we definitely do not want this one to bounce around...unable to read it...that's why the thing works yet...it has it's own power regulation at hand~

2 out of 2 people think this is helpful.

the thermostat is not electrical....but the temperature sensor is~ this is what your computer decides the air/fuel mixture should be at ambient conditions...if bad the car won't run okay~

4 out of 4 people think this is helpful.

we alright still...you hangin' in there?~

50

Just fixed mine it's not a ground . Take your instrument cluster out and completely apart. Takes 10 minutes. Take the circuit board without gauge needles on it and plug it back into the truck carefully. Take a pencil with the rubber eraser side push on all the small compactors and resisted lightly. You will find one problem nears the two big round compactors the size of acorns. Mine was a retailer small flat resistor marked 205 on top. It was never factory soldered on one side. Soldered back . All is good. I had to set gauge points back at 0. Let truck warm up set temp just push the needle on where it should read 190 or so as before. Same with rpm. Fill tank then set . GPS speed then set and test . Oil should be 35 to 38 at idle. Your welcome ... high five it's easy they have computer machine welds their recall is because it missed a solder dang.

5 out of 5 people think this is helpful.

Your Answer

Add photo

Related Questions

TrailBlazer

Looking for a Used TrailBlazer in your area?

CarGurus has 5,315 nationwide TrailBlazer listings starting at $1,700.

ZIP:

Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 760
#2 bigdogracer
bigdogracer
Reputation 670
#3 tennisshoes
tennisshoes
Reputation 550
View All

Related Models For Sale

Used Chevrolet Tahoe
775 Great Deals out of 28,432 listings starting at $1,500
Used Jeep Grand Cherokee
840 Great Deals out of 68,654 listings starting at $864
Used GMC Envoy
49 Great Deals out of 2,388 listings starting at $1,800
Used Chevrolet TrailBlazer EXT
11 Great Deals out of 1,329 listings starting at $2,900
Used Chevrolet Silverado 1500
2,283 Great Deals out of 155,210 listings starting at $1,395
Used Ford Explorer
940 Great Deals out of 73,742 listings starting at $750
Used Chevrolet Impala
792 Great Deals out of 34,371 listings starting at $799
Used Chevrolet Equinox
1,260 Great Deals out of 65,946 listings starting at $1,600
Used Dodge Durango
299 Great Deals out of 24,118 listings starting at $1,500
Used Chevrolet Blazer
1,340 listings starting at $1,995
Used Ford F-150
2,691 Great Deals out of 211,555 listings starting at $1,000
Used GMC Yukon
517 Great Deals out of 17,114 listings starting at $1,799

Used Cars For Sale

2007 Chevrolet TrailBlazer LS For Sale
6 Great Deals out of 136 listings starting at $2,995