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.
Continuity Test Procedure (1990-91)
Release the Engine Control Module (ECM) connector retaining clip and remove the connector from the ECM. Access is gained by removing the front seat base trim of the right hand front seat. Remove the connector shroud and maneuver it along the harness until there is enough clearance to enable meter probes to be inserted into the back of the plug. There are six pin numbers 1, 13, 14, 27, 28 and 40 molded onto the rear of the plug as shown in the illustration below, for clarity the electrical leads have been omitted. Pin colors are identified in ENGINE CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (1990-91) table.
| Pin Number | (1) Wire Color | ||
|---|---|---|---|
| 1 | Red/Green | ||
| 2 | Brown/Orange | ||
| 3 | Yellow | ||
| 4 | Black | ||
| 5 | Grey/Black | ||
| 6 | Yellow | ||
| 7 | Green/Blue | ||
| 8 | Purple/Yellow | ||
| 9 | White/Light Green | ||
| 10 | Black/Yellow | ||
| 11 | Yellow/White | ||
| 12 | Blue/Red | ||
| 13 | Yellow/Blue | ||
| 14 | Black | ||
| 15 | Brown | ||
| 16 | Blue/Purple | ||
| 17 | Gray/Yellow | ||
| 18 | White/Pink | ||
| 19 | White/Gray | ||
| 20 | Red | ||
| 21 | Yellow/Black | ||
| 22 | Blue/Red | ||
| 23 | Blue | ||
| 24 | Blue | ||
| 25 | Red/Black | ||
| 26 | Green/White | ||
| 27 | Black/Gray | ||
| 28 | Blue/Gray | ||
| 29 | Orange | ||
| 30 | Pink | ||
| 31 | Black/Green | ||
| 32 | Gray/White | ||
| 33 | Black/Gray | ||
| 34 | Orange/Black | ||
| 35 | Blue/Green | ||
| 36 | Black/Green | ||
| 37 | Not Used | ||
| 38 | Brown/Pink | ||
| 39 | White/Black | ||
| 40 | Black | ||
|
|||
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.
No obligation. See pricing before you book.