Grand Cherokee 2WD V6-3.7L (2008)
7. Allow battery (4) in disabled vehicle to charge to at least 12.4 volts (75% charge) before attempting to start engine. If engine does not start within
15 seconds, stop cranking engine and allow starter to cool (15 min.), before cranking again.
DISCONNECT CABLE CLAMPS AS FOLLOWS:
Disconnect BLACK cable clamp (1) from engine ground on disabled vehicle.
When using a Booster vehicle, disconnect BLACK cable clamp from battery negative terminal. Disconnect RED cable clamp from battery positive
Disconnect RED cable clamp (2) from battery positive terminal on disabled vehicle.