My tach (that I orderd over a month ago from speedpeople.com just arrived today) so I installed it. But my car has some electrical probiblems, Im not sure exactly what it is but it started when I installed my subs. At first when I hooked up my subs they wernt getin enoughf power, so I installed a new ground cable to my battery and they worked, but they made my altinator squeel. I have been driving like that for about a month, and I think it is finally takin its toll. It has been getin a little harder to start my car it usuly takes 2 or 3 trys, and my lights dim when i start it. and today when I installed my tach its not getin enoughf power to it, It will go up to where ever I set my shift light to go on and the needle will just bounce there a little bit because it dosent have enoughf power to turn the light on.( I know its not that tach that is bad because It worked fine untell I had it in there for about 20 min.)
So if anyone knows what might be wrong, or have an Idea what it might be please help me out. thanks

 

your altenator is prob goin check the voltage at the batery before you stat the car and then while its running. you should have just over 12 voltswith it off andanywhere beteen 13 to 14 when its runnig ifit doesentincrease then the altenator isshot