Voltgage problem

[MonzaRacer]

Just remember to hook the main power wires to the relays with a heavy guage wire and a heavy fuse then the fans will never give a problem.
I would use 10 guage wire with a 30 amp maxifuse to the fans and ground to either directly to the battery or ,say if the battery has a ground to the rad support then the support is good too.
Never be afraid to use heavier wre or to add an extra ground in electrical.
OH and on electronic items a fuse of equal size in both power and ground will protect them incase of wires being crossed or say if someone tries to jump the car and hook the cables up wrong(had this happen) and it trashed the ignition box.
I had fella hook up a high dollar CB once and they did it backwards and burnt a trace inside. Luckily it was fixable.
Good luck.
Lee

[paul67]

I had this problem and found I had not got enough earths. See my post