and 4ga. ran from a? optima yellow top to a fosgate 10 farad cap then to a t1500.1 and a p400.4 the voltage shows 14.4 but drops to around 9 or 10 should i try regrounding the capacitor or what would cause the voltage to drop this bad t1500.1 is powering 2 T1 12d4 and the p400.4 is powering a...