Why is my gas guage is going up and down in my 1999 caravan?

SOURCE: TEMP GUAGE TOO LOW

thermostat is sticking

SOURCE: Gas gauge - Doodge Caravan 2000

Probably easier to replace fuel tank sender unit as constant on off condition heard or not cant be good .Potential electrical spike.

SOURCE: instrument panel is flickering on my 1999 dodge caravan

the heater control head . remove it and look at the big connector to see which wire is starting to burn up.i had a 99 caravan and that was the problem,replaced the control head and worked perfect ever since

SOURCE: temperature gauge is fluctuating while driving.

I'm thinking the coolnat level is low, and this might be caused by a bad head gasket - At least $800 to fix - sorry.

SOURCE: I HAVE A 1999 CARAVAN

Yes you are ru=ight about cold solder joints. as you might be handy working on cars youcan try to fix it yourself, But if your not handy with tools andintricate things you best leave this work to those that are. Remove the instrument cluster, leavingthe wiresconnected. turn the key on and push on the electrtrical connecteras you watch the gauges that are/nt working. If the serial bus weren't makig a connection then the check engine light would beon, or is it? Wigh the key off disconnect the electrical connector and the pins that plug in I scrach them by pulling lightly on the with treaded needle nosed pliers slipping off till they are all a little ruoghted up. Reconnect and try again. Sometimes afterhavingthe cluster disconnected ou may needto disconnect the battery sothe ECM will look for the cluster again. This is a common problem but ther's many varaitions of reconnecting including using a true scanner to cycle the gauges in an output test.