RogerZ 280

thanks for those. ill check them all out.

Ok .. lets get this out of the way. :nervous:I reversed my cables on a jump of a 1983 280zx turbo i was picking up. Ive found a 'donor' car that ive replaced my fused unit next to the battery( the one in the little box with three plugs), engine turned but no start. tried too many times, battery died. ok, lets see what else i can ruin. replaced the battery, replaced all 6 plugs, and then the engine just made a 'thunk' sound when i tried to start it. so, i went to the donor and got the starter thinking that was now the problem. R and R the starter, turned the key and.... thunk. Spoke to a mechanic and he thought the engine might have siezed by fluids backed up due to the number of start attempts. so........... i take my 29m and hand turn the engine to try to free it. it turns, put the key in, turn it . nada. How many relays, capacitors, fuses, small rural towns, might i have fried, and how do i fix this? note. Im not new to 280s, jsut the electrical problems. thanks