Quote:
Originally Posted by Peter86
After market wiring systems have a audible beep, my V70 has a Volvo wiring system and does a bulb check, it just warns when a bulb is out otherwise nothing. Only downfall is you don't know if you have left the caravan/trailer unplugged by accident so double check before driving off unless you can see your marker lights on then you know its plugged in.
Volvo dedicated electrics also adapt abs etc for stability when towing, basic aftermarket electrics don't offer this.
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they also look after the rear fog light and reversing sensors and no doubt a few more things we do not realise