Hi all, need some help please! Coles notes is in title...need the circuit diagram showing the rear wiper switch circuit.

Long version:

Vehicle: 1994 Chevrolet S10 Blazer SUV

Rear wiper works with switch on continuously, but not returning to park.
Motor and park circuit on motor is ok. I verified this by applying power to both outer wires on plug and grounding the center one. One would cause motor to keep running, the other would return wiper motor to park position.
On the vehicle side, at the plug for the motor I get 12V on the wiper on side, but around 10V on the park side. I need a wiring diagram showing the wires and circuit, especially how the switch is wired.

Thank you!

 

Here:

 

Some pictures below for future reference. I removed the motor and hooked it up to the battery to bypass all wiring and switches. TIP: Don't remove the motor yet. Test it first by using two long wires (labelled + and -) from the battery. The middle wire on the motor plug is the ground (black) as in the circuit diagram above. To test the motor, wire the ground to the negative of the battery. Then apply (+) to one of the outer wires, one at a time. With battery (+) on the orange wire, the motor should stay on (the 'gearbox' that's covered causes the wiper arm to swing back and forth). Now remove the (+) from the orange, and apply to the brown wire. The motor should run, then stop at the park position (assuming it didn't stop there by chance). This is because the power from the plug goes to a park disk beside the motor that has a part with an interruption in it (see pictures). Note that if you apply voltage to the park circuit and the motor happened by chance to stop in park or very close, then it'll run for very short or nothing will happen. So apply power to the orange for an instant, then again on the brown, to make sure both circuits work.
In my case the motor was fine, so I did extra work by removing it (see tip above). Before testing the motor, I even opened it to check out the park circuit and clean it, not needed in my case.

Also check the wiring near the hinge where hatch glass meets frame. Wires tend to break there. So if the motor passes the direct test of applying voltage from the battery, have a look there. I had fixed that wiring previously but checked again to make sure. So both my motor and wiring at the back were fine...but the motor would run, but was still not parking. I noticed less voltage was coming to the back on the parking circuit (brown wire) using a multimeter and double checking with a test light. I checked the switch, took it apart (sorry no pics.) and wasn't convinced there was a problem there.

I finally decided to be a bit unorthodox and tapped in power from the rear hatch light. Two of the three wires always have power (found out using multimeter and test light, either will work), and since the light rarely will be on when the wiper parks, it shouldn't be a problem. If the fuse blows with them both on, I'll know to avoid using both (i.e. open the door with the wiper parking). According to the wiring diagram, it looks like the voltage in my case is being lost from the switch to the back somewhere, and this was a quick solution.

 

Having trouble posting pics...tbc

 

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(Posting for anyone in the future with the same problem. Any questions PM me a copy cuz I don't come around often lol.)

Adding some tags: wiper motor exploded view apart circuit shematic