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.

2008 Jeep Commander Limited, 5.7 2, 4WDFACTORY OEM SERVICE PROCEDURE

Positive Temperature Coefficient Relay 1 (Diesel) Connector End View

RELAY-PTC NO. 1 - 0-WAY(DIESEL)

Courtesy of CHRYSLER CORP.
CAV	CIRCUIT	FUNCTION
30	A923 10RD	FUSED B(+)
85	K360 20GY/BR	PTC NO. 1 RELAY CONTROL
86	A15 16RD/TN	FUSED ASD RELAY OUTPUT
87	N113 10DB/OR	PTC NO. 1 RELAY OUTPUT
87A	-	-

Factory Service Tools

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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.

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