I just found an awesome catalog of electrical parts and already I found relays, switches, fuses, fuse holders and wires and connectors that would be suitable for the car. The catalog alone makes a great resource for helping us decide on parts. The company seems geared towards automotive electrical and prices look reasonable.
Here are some of the connectors I imagined using for sensors:
http://order.waytekwire.com/productdetail/M37/38207Here is a link to download the catalog:
http://pages.nxtbook.com/nxtbooks/wayte ... 1220634372I created an account with them and have a print catalog on the way.