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 Wrangler 4WD V6-3.8LFACTORY OEM SERVICE PROCEDURE
Battery: Diagrams
Component ID: 21
Component : BATTERY
Connector:
Name : BATTERY-CABIN HEATER-EYELET
Color :
# of pins : 1
Qualifier : (DIESEL)
Pin Circuit Description
1 A2 6RD B(+)
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-GENERATOR-EYELET
Color :
# of pins : 1
Qualifier : (GAS)
Pin Circuit Description
1 A1 10DG B(+)
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-GLOW PLUG-EYELET
Color :
# of pins : 1
Qualifier : (DIESEL)
Pin Circuit Description
1 A1 4RD B(+)
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-NEGATIVE
Color :
# of pins : 1
Qualifier : (DIESEL)
Pin Circuit Description
1 Z902 4BK GROUND
Pin Circuit Description
1 Z901 6BK GROUND
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-NEGATIVE
Color :
# of pins : 1
Qualifier : (GAS)
Pin Circuit Description
1 Z901 6BK GROUND
Pin Circuit Description
1 Z902 6BK GROUND
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-NEGATIVE-EYELET
Color :
# of pins : 1
Pin Circuit Description
1 Z903 10BK/LG GROUND
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-POSITIVE
Color :
# of pins : 1
Qualifier : (DIESEL)
Pin Circuit Description
1 A0 2RD B(+)
Pin Circuit Description
1 A0 6RD B(+)
Pin Circuit Description
1 A1 4RD B(+)
Component Location - 1
Component Location - 10
Component Location - 9
Connector:
Name : BATTERY-POSITIVE
Color :
# of pins : 1
Qualifier : (GAS)
Pin Circuit Description
1 A0 4RD B(+)
Pin Circuit Description
1 A0 6RD B(+)
Component Location - 1
Component Location - 10
Component Location - 9
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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