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The BMW Range
5 Series
E28
ignition switch
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<blockquote data-quote="blackbeast" data-source="post: 584149" data-attributes="member: 21276"><p>Hello again,</p><p></p><p>The starter function is just to crank the engine. When u switch it on and yr engine cranks...your starter is fine then.</p><p>Sometimes the mechanical switch for the starter is broken(ignition switch), causing no supply to the starter hence it won't start.</p><p></p><p>For e28 and e30 model, the switch mechanism inside is made of plastic, after a while it get brittled and kaput...wear and tear of course.</p><p>The switch has 3 steps/turn, 1st step/turn is normally for radio, 2nd step/turn for the engine management system(EMS), 3rd step/turn is for the</p><p>starter. 2nd and 3rd step is latched, meaning when u turn to 3rd step the (EMS) is also engaged to allow the fuel pump, ignition etc to work. </p><p></p><p>It is NOT advisable to separate the ignition switch from the key barrel, minor mistake may cause the switch mechanism faulty and cannot be </p><p>used at all. Alternatively, if your 1st and 2nd step switch is ok, u can just add another push-start button for the starter, cool isn't it. But from</p><p>your explanation, probably yr 2nd step switch is having problem...you can add another ON switch for this in order to keep your original set of</p><p>keys...</p><p></p><p></p><p>regards,</p><p>blackbeast</p></blockquote><p></p>
[QUOTE="blackbeast, post: 584149, member: 21276"] Hello again, The starter function is just to crank the engine. When u switch it on and yr engine cranks...your starter is fine then. Sometimes the mechanical switch for the starter is broken(ignition switch), causing no supply to the starter hence it won't start. For e28 and e30 model, the switch mechanism inside is made of plastic, after a while it get brittled and kaput...wear and tear of course. The switch has 3 steps/turn, 1st step/turn is normally for radio, 2nd step/turn for the engine management system(EMS), 3rd step/turn is for the starter. 2nd and 3rd step is latched, meaning when u turn to 3rd step the (EMS) is also engaged to allow the fuel pump, ignition etc to work. It is NOT advisable to separate the ignition switch from the key barrel, minor mistake may cause the switch mechanism faulty and cannot be used at all. Alternatively, if your 1st and 2nd step switch is ok, u can just add another push-start button for the starter, cool isn't it. But from your explanation, probably yr 2nd step switch is having problem...you can add another ON switch for this in order to keep your original set of keys... regards, blackbeast [/QUOTE]
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ignition switch
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