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.

1988 Chrysler Conquest AutomaticFACTORY OEM SERVICE PROCEDURE

Control Relay

NOTE: If control relay is defective, fuel pump, injectors and ECU will not operate.

Using an ohmmeter, check for proper continuity between relay terminals as outlined in the CONTROL RELAY INSPECTION table. Also, see Fig 1 .

CONTROL RELAY INSPECTION

Relay Terminals

Ohms

1-7, 3-7

Infinity

4-8

Zero

2-5, 2-3

6-4

1-7 ⁽¹⁾

Zero

3-7 ⁽²⁾

Zero

⁽¹⁾	Apply battery voltage across terminals No. 6 (positive) and 4 (negative).

⁽²⁾	Apply battery voltage across terminals No. 8 (positive) and 4 (negative).

Fig 1: Control Relay Terminal Numbers

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

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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.