Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1992 Mercury Capri Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Pinpoint Test STG - Switch To Ground
NOTE:
Enter this test only when directed here from QUICK TESTS or another PINPOINT TEST.
STG CIRCUIT PIN IDENTIFICATION
| Switch | ECA Pin | BOB Pin | Wire Color | |||||
|---|---|---|---|---|---|---|---|---|
| 1.3L | ||||||||
| ACS | 1Q | 10 | BLU/RED | |||||
| BLMT | 1S | 23 | GRN | |||||
| IDL | 1N | 18 | YEL/BLK | |||||
| NGS/CES (1) | 1V | 43 | BLU/WHT | |||||
| PSPS | 1P | 19 | PNK | |||||
| WOT | 2L | 27 | YEL | |||||
| 1.6L | ||||||||
| BPS (2) | 2L | 12 | LT GRN/BLK | |||||
| IDL | 1E | 18 | GRN/ORG | |||||
| NGS/CES (1) | 1G | 8 | RED/BLU | |||||
| PSPS | 1K | 19 | GRN/RED | |||||
|
||||||||
NOTE:
For 1.3L, blower motor resistor must be disconnected, HEATER fuse must be removed, and blower motor switch must be in position "1" when testing ACS signal.
- Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between switch BOB test pin and ground. Cycle switch. If resistance is greater than 10,000 ohms with switch open and less than 5 ohms when switch is closed, switch is okay; go to step 4). If resistance is not greater than 10,000 ohms with switch open, or greater than 5 ohms when switch is closed, go to next step.
- Turn ignition off. Disconnect switch. Connect ohmmeter between switch terminals on 2-pin switches, or between ground and switch ECA terminal on multi-pin or one-pin switches. Cycle switch. If resistance is not greater than 10,000 ohms with switch open, or is greater than 5 ohms when switch is closed, replace switch. If resistance is greater than 10,000 ohms with switch open and less than 5 ohms when switch is closed, switch is okay; go to next step.
- Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between BOB pin for suspected switch and BOB pins 26, 37, 57, and 60. If any measurement is less than 10,000, repair shorted wire in question. If all measurements are greater than 10,000 ohms, go to next step.
- Turn ignition off. Install BOB, leaving ECA disconnected. Measure resistance between BOB pin for suspected switch and switch connector. If resistance is greater than 5 ohms, repair wire in question. If sent here from SWITCH MONITOR TEST in QUICK TESTS, replace ECA; otherwise, return to QUICK TESTS.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.