Blinking In-Door Lamp,warning light. Do I need grounding cable?

[arih]

hi all, got this problem after transplant to 6a12TT. My car now like not enough voltage, everytime I open door, my alarm system auto switch on hazard light (both signal lamp blinking)..when that happen, all inside-car lamp,clock,warning light keep fade in-fade out following that hazard light.According Volt meter in my Apexi TT,reading are 13.5-14.0 with engine idling. And when I keep pressing my auto window..voltage drop 1 by 1 till 13.0...I got pivot raisin VS installed but no G-cable as my old cap ayam g-cable not long enough to connect on this new engine. Is it problem with my alternator or do you guys think that Installing new G-cable can solve this problem?



thanks in advance!

 

[Ronald_loulan]

G-cable is needed.....
13.5-14.5v is ok....