On my '87 chevy s-10 there is a green wire coming from the ignition, a red wire coming from somewhere else, and two posts on the solenoid one marked "s" and the other marked "r" which one is which?

Red is from the battery, put it on the B, for battery post. Turn the switch on to the 1st position and touch the other wires, first the green, then the white, to the post that you have power to with the switch on, the IG is ignition that is power to the coil and the other is the starter solenoid. Touch the green wire to the hot switch post and you'll either crank the engine or turn the lights on. That's just to test which of the green and white are the ones that go on the IG post. and the other on the L post which is the starter solenoid.

The small wire from the ignition switch goes to the small post on the starter solenoid. The large wire from the battery goes to the large post on the starter solenoid.

There are three posts on the starter solenoid. Two large ones, and one small one. One of the large ones has a braided wire going into the starter. leave this one alone. On the other large ones, you will connect the positive battery cable as well as the large red wire coming from the alternator. The small purple wire connects to the small post on the solenoid. Lastly, on the engine block pointing the opposite way (towards the drivers side) is another stud and you will connect the negative battery cable to it.
Make sure that none of the wires can touch the other posts coming out of the solenoid.


4: Negative Battery Cable
6: Purple Starter actuator wire - 12V when key turned to start.
9: Positive Battery Cable
10: Positive Cable from Alternator

Usually one is small enough to fit on the small terminal and the rest fit on with the battery cable.
The small purple wire from the key switch goes on the terminal marked S.
You could do a continuity test and check it with the battery disconnected by checking it back to the neutral safety switch.

There are no relays involved in the headlamp circuits on a 1989 Chevrolet Cavalier Z24.
The headlamp switch gets power on pin "C" (RED wire) from fusible link "A" which attaches to the starter solenoid. The headlamp switch sends the power from pin "D" (YELLOW wire) to the dimmer switch pin "C" and the dimmer switch sends the power either to the high beam lights pin "B" (LIGHT GREEN wire) or the low beam lights pin "D" (TAN wire) depending on which position it is in.

I PUT A 350 1500 V8 MOTOR IN MY CHEVY CAPRICE. GAS IS GETING UP THREW THE LINES INTO THE INJECTORS BUT.NOTHING COMES OUT THE INJECTORS??? NOW ONE SIDE SPRAYS..... WITH THE GREEN AND RED WIRE. BUT THE OTHER SIDE WITH THE...BLUE N GREEN WIRE NOT SPRAYING UNLESS I TOUCH IT WITH A WIRE FROM MY BATTERY POST (POSSITIVE POST) WHAT TO DO???

Hi, there should be one big wire and one smaller wire. The big wire goes on the top terminal, and the smaller wire goes on the start terminal (marked with an "S"). Do you have more than 2 wires?

On most GM vehicles there are three posts on the starter. The main power supply and then one for solenoid to engage and the other is for ignition system. Make sure the vehicle is in park for automatic transmission with emergency brake on or neutral with the emergency brake engaged and block the wheels as well. I would try to jumper a wire from the main post to one for a second and then the other (just a quick touch) to see if the starter is functioning properly. If this cranks the engine over then check to see if you have the wires connected to the starter post or the ignition post. If they are attached correctly and it still will not crank over you probably have an issue further up in the wiring harness. Possibly a bad ignition switch, bad ground or a broken wire somewhere.

there should be a slot for each wire on back of ignition play with them till you get it right cant hurt anything

you should only have 3 wires going to the starter there will be a large black wire possably with a red end, a thiner red wire and a thinner purple wire

the thin purple wire is the trigger wire and goes on the small post on the starter solenoid. \
the thin red and thick black/red will get tied in together on the larger post on the starter solenoid