The harness I built is for an HID system I am retrofitting into my LS. The relays will be activated by the passenger side low and high beam stock harness. So, when the low-beams come on, they trigger the relays to pull 12v and power the HID ballasts which fire up the 35 watt HID bulbs (2 of them). It is designed to power the high beams as well (55 watt) when I switch them on, and keep the low beams on during this time.
The harness consists of 14 gauge wire, except for the 12v input, which is a 10 gauge wire. This is the wire that I want to attach to the +12v terminal on the starter solenoid post. I know someone posted in the other forum about the "surge", but I don't get how running a cable all the way back to the battery would cause the harness to be unaffected by this surge. As an example, if you've got 2 wires coming off the positive on the battery with one going to the harnes, and the other going to the starter solenoid (I guess this isn't really an example per se, because this is the way it is), then I don't understand how that surge would not travel straight down the solenoid wire to the battery, and from there down the wire going to the harness. Just because I run a separate wire from the battery to the harness (instead of from the solenoid terminal to the harness), this does not mean that the circuit is isolated.
Hopefully that all made sense
. And to answer the question about the power being drawn when the car is started, yes I believe with the lights set in "auto" mode they are on when I start the car.
So what do you think? Should I be okay given that I've got a 30 amp inline fuse to protect against and spikes/surges?