Doesn't the heater blower motor have it's own ground wire? I found something from searching on the internet. It's called a ground bar, which is sort of a buss bar for ground wires. I was thinking (just thinking for now) of putting the ground bar on the firewall, and connect the ground strap from the engine, and the ground wire from the blower motor, the regulator, and the ECU attached to it as well. Just trying to come up with ways to keep the engine compartment neat and tidy!