Here it goes:
Fuses: Everything can/ should get a fuse. I'm not too worried about this procedure. I imagine its safer to for everything to have a fuse, rather than not.
Relays: My understanding is, anything that requires a "decision" or can be overloaded by too much power needs a relay (ie. fuel pump, headlights, radiator fan). Also, each relay would need to have a fuse, for safety.
ECU: Unnecessary controls can be removed ( power steering module, ac/heater etc), which would result in less of a power draw by the ecu, and fewer potential electrical problems.
Ignition: I'm fairly lost with this. I'm not sure how to wire the on and start positions.
Id like to use some universal fuse boxes for the main fuse box and the relays, like these:
I have this pin out map, which matches my S14 WA ECU:
This relay wiring diagram, which also matches the above diagram:
Do the IACV and Air regulator wires come straight from each unit to the relay?
Id like to do something like this for the ECU:
Is this correct? Starter/ Alternator diagram:
So here is what I've gathered so far:
Relays: Fuel pump, ECCS, radiator fan, reverse lights,and headlights all need relays. What about windshield wipers, turn signals, horn? Do they NEED relays? or just fuses?
I'm thinking the wiring would be as so:
Heater blower: battery-->fuse-->heater blower
Radio: battery-->radio (radio has its own fuse)
Map light: battery--> fuse-->switch--> map light
Cigarette lighter: battery--> fuse-->Cigarette lighter
Reverse light: battery-->fuse-->relay: (reverse sensor in transmission, ignition power, ground, bulb)
Brake lights:battery-->fuse-->brake light switch--> bulbs
Fuel pump:battery-->fuse--> relay: (ignition power, ground, fuel pump, ecu)
headlights:battery-->fuse-->relay: (headlight switch, bulbs, 12v power,ground)
Radiator fan:battery-->fuse-->relay: (fan switch, ignition power, ground, fan)
Horns: battery-->fuse-->horn button-->horns
Ignition: unknown, please help
Gauges: Ignition power-->fuse--> each gauges source ( fuel level, water temp, speed sensor from transmission, tach wire ecu, volts any source, oil pressure sensor). BTW, i purchased speedhut electronic gauges, which come with all the harnesses, and wiring diagrams.
Starter: 4 gauge wire from alternator, smaller wire from ignition
Wipers: battery--> fuse--> wiper switch--> wiper mechanism
Turn signals:battery--> fuse--> turn switch-->bulbs
Windshield squirters: battery--> fuse--> squirter switch--> squirter mechanism (relay to tie in the wipers?)
ECU: 12v constant or ignition?, ground
That's all i can figure for now. Please provide feedback if you have first hand knowledge. Id really appreciate it.
Also, does anyone have a definitive "ecu de-pin" list? Can I just remove all unnecessary pins/ wires?
