remove the caliper, by removing the two holding bolts, then use a old brake pad against the pistons and a c clamp and push piston all the way in, next is to clean and lube pad mounting surface and the caliper slide pin, then install new pads on bracket then caliper and tighten caliper bolts, heres a diagram to help you,
Check/change air filter.
Check/change spark plugs & plug wires. The wires can be check with an OHM meter, and the specs for the resistance in the manual. So can the ignition coils.
Change fuel filter...easy.
Last, if you have scanner...check MAF(mass air flow sensor) for operating specs...5g/sec at idle to 300gal/sec+ @ 3,000 RPM.
Why did you install a new ignition switch ? Lock cylinder part or electrical ?
You have no idea of the complexity of the electronic's on this vehicle ,your best bet take it to a qualified repair shop.
The body control module (BCM) uses the discrete ignition switch inputs ignition 1, ignition 3 and crank to distinguish the correct power mode. Once the BCM has determined the power mode selected by the vehicle operator it will energize the Ignition relay, Run relay and retained accessory power (RAP) relay, depending on which power mode is selected.
Power to many of this vehicle's circuits are controlled by the module that is designated the power mode master (PMM). This vehicle PMM is the body control module (BCM). The PMM controls which power mode (Run, Accessory, Crank, Retained Accessory Power, or Off) is active.
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits.
Do you know how to voltage drop automotive electrical circuit's using a DMM - digital multi-meter ? Checking main power feed to fuse box etc.... loose connection , bad positive feed cable etc ..
Do you know what wiring diagrams are ? Electrical distribution diagrams ? Electric Testing Techniques You Need to Know
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model an engine size. Under system click on electrical distribution then under subsystem click on power distribution . Click the search button then the blue link's . test the circuit's . Plus knowing how the systems work would be good . When you turn the key to start it send a low voltage signal to the BCM - body control module . The BCM sends a message to the PCM/ECM - engine computer to energize the starter relay . A lot of complex electronic's an electrical systems involved .