the darn thing wont hold a charge i have an 88 RX-7 GTU and the damn thing wont keep a charge it drains the bat so much to turn the lights on and it pisses me off what could be some things or how could i go about finding out the cheep way what is wrong?

 

Did you recently attach a new item to the electrical system in your car? (Stereo, amplifiers, etc) If so, maybe its hooked up to where its constantly drawing power.

Is the alternator charging the battery? If not, the battery will eventually die. Use the factory service manual (available free online for downloading to your PC) or check the Haynes manual for troubleshooting the alternator.

Maybe the battery needs to be changed. They don't last forever.

 

Bad alternator or voltage reg in the alternator

 

take a volt meter and put it on the battery and observe voltage. turn the car on observe voltage again. if final voltage is higher then initial voltage then alternator is charging. if final voltage is the same or lower then initial the alternator is to blame. also get a voltage drop test can be performed any local auto store.

 

sweet thank you peeps