my dash lights work but they go dim and then back to bright. no set amount of time for this they just do it all the time. i need help with this,my tack goes from 0 to high all the time, my gas gauge is crazy too it goes to half a tank or goes next to empty, an it has a full tank of gas. i sure need your imput, thanks, it is a 91 vette.automatic

Sounds like bad/ loose ground wire in dash cluster.
Tacho may be seperate problem; well know problems with 90 /91 tachos reading erratically

hell yeah! My buddys 1990 tach is possessed! lol

do you think the short would be onthe drivers side under the dash? this my first vette an i don't know anything about them.

my dash lights work but they go dim and then back to bright. no set amount of time for this they just do it all the time. i need help with this,my tack goes from 0 to high all the time, my gas gauge is crazy too it goes to half a tank or goes next to empty, an it has a full tank of gas. i sure need your imput, thanks, it is a 91 vette.automatic

My Dash also goes Dim and bright at times, but very few times and not too Dim. Now as for my Gas meter, I have the same problem as you.... Marks me half a tank when I'm on E!! and sometimes when I'm on half it'll mark me for a full tank. If you get to the problem before I do, I would appreciate it if you told us here :). I am seriously thinking on carrying a stick with me and dipping it in my gas tank to meter gas that way.

Now as for my Gas meter, I have the same problem as you.... Marks me half a tank when I'm on E!! and sometimes when I'm on half it'll mark me for a full tank.
Most likely the slider on the gauge sender unit needs cleaning

http://forums.corvetteforum.com/c4-tech-performance/1574491-fuel-gauge-sending-unit-repair-tech-article.html

do you think the short would be onthe drivers side under the dash? this my first vette an i don't know anything about them.

http://www.batee.com/corvette/dcrg/index.shtml

Most likely the slider on the gauge sender unit needs cleaning

http://forums.corvetteforum.com/c4-tech-performance/1574491-fuel-gauge-sending-unit-repair-tech-article.html


Thanks for the great info Vetteoz, thing is I already did part of this :X. At mechanic school I went in, did all the steps and found my problem(so I thought...) My float arm practically came off when I took out my sending unit. I did a temporary solution by tying down the float arm to the sliding base(up and down to mark the fuel) with a small tie strap. Maybe my whole unit is defective because I'm still getting false readings :(.

To the left of your A/C panel above the 4 buttons (trip,english/metric) there`s a ambient light sensor, This sensor along with the headlight switch rheostat adjust the dash lights. Make sure you don't have something covering the sensor or dash lights will go crazy.
David Steele