Mini Cooper workshop manual page 27

text version of content this owner's manual page from owners manual to the vehicle Mini Cooper, year of production 1961 - 2000:

GENERALINFORMATION ELECTRICALPRECAUTIONS Having confirmed a component to be faulty switch off the ignition and disconnect the battery. Remove General the component and support the disconnected harness. When replacing the component keep oily Thefollowing guidelines are intended to ensure thehandsawayfromelectrical connection areas and safety of the operator whilst preventing damage topush connectors home until any locking tabs fully the electrical and electronic components fitted to theengage. vehicle. Where necessary specific precautions are detailed in the relevant sections of this Manual whichBattery disconnection should be referred to prior to commencing repair operations. Before disconnecting the battery, switch off all electrical equipment. If the radio is to be serviced, Equipment- Prior to commencing any testensure the security code has been deactivated. procedure on the vehicle ensure that the relevant test equipment is working correctly and any harnessCAUTION:Topreventdamagetoelectrical or connectors are in good condition, this particularlycomponentsALWAYSdisconnectthe applies to mains lead and plugs. battery when working on the vehicle electrical system. The earth lead must be WARNING:Beforecommencingworkon disconnectedfirst and reconnected last. anignition system all high tensionAlwaysensurethatbatteryleadsarerouted terminals, adapters and diagnosticcorrectly and are not close to any potential equipmentfortestingshouldbeinspectedtochafing points. ensurethattheyareadequatelyinsulatedand shielded to prevent accidental personal contactsBattery charging andminimisetheriskofshock.Wearersof surgically implanted pacemaker devices shouldRechargethebattery out of the vehicle and keep the not be in close proximity to ignition circuits ortop well ventilated. While being charged or diagnostic equipment. discharged, and for approximately fifteen minutes afterwards, batteries emit hydrogen gas. This gas is Polarity - Never reverse connect the vehicle batteryinflammable. andalwaysobservethecorrectpolarity when connecting test equipment. Always ensure any battery charging area is well ventilated and that every precautions is taken to High Voltage Circuits - Whenever disconnecting liveavoid naked flames and sparks. ht circuits always use insulated pliers and never allow the open end of the ht lead to come into contact with other components particularly ECU’s. Exercise caution when measuring the voltage on the coil terminals while the engine is running, high voltage spikes can occur on these terminals. Connectors and Harness - The engine compartment of a vehicle is a particularly hostile environment for electrical components and connectors. Always ensure these items are dry and oil free before disconnecting and connecting test equipment. Never force connectors apart either by using tools or by pulling on the wiring harness. Always ensure locking tabs are disengaged before removal and not orientation to enable correct reconnection. Ensure that any protective covers and substances are replaced if disturbed. ELECTRICALPRECAUTIONS 1

owners manual Mini Cooper