Need Help With Gauges on 87 TA
 

So my trans in my 99 SS is done and its going to take months to save for an M6 swap, so i need my project 87 TA running asap. i need to get the guages working. fuel, battery, and temp arent working. what specifically can i do to check/fix them.

they are all connected in back right? has the dash ever been taken apart?

To my knowledge, no. All other gauges operate good though, and the bad ones work low...meaning they fluctuate when the car starts but settle oddly low, i.e. fuel empty, no voltage, dead cold.

lose connections , crosion , cars been in a accident and things were fixed poorly ?