Simo22 Posted April 9, 2021 Share Posted April 9, 2021 Hi ,don't know if anyone has had similar problem but after having a new alternator heated screen does not switch on no light on button ,it can be turned on with a diagnostic device but will not then stay on or come on once device is unplugged ,any help would be great. T I a Quote Link to comment Share on other sites More sharing options...
Luke4efc Posted April 9, 2021 Share Posted April 9, 2021 What's the battery voltage when the engine is running? Not only will the screen cut out if the voltage is too low, but also if the alternator is overcharging the battery. Quote Link to comment Share on other sites More sharing options...
unofix Posted April 9, 2021 Share Posted April 9, 2021 It sounds very much to me like you have a charging fault. Just because the alternator has recently been changed doesn't mean it working. As Luke says you need to measure the battery voltage with the engine running Quote Link to comment Share on other sites More sharing options...
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