Suppliers of wholesale electrical goods for cars
USA
* CarParts.com: https://www.carparts.com/electrical/
* AutoZone: https://www.autozone.com/electrical
* O’Reilly Auto Parts: https://www.oreillyauto.com/category/electrical
* Advance Auto Parts: https://shop.advanceautoparts.com/electrical-supplies
* NAPA Auto Parts: https://www.napaonline.com/en/p/electrical
Europe
* Autodoc: https://www.autodoc.co.uk/electrical-parts
* Euro Car Parts: https://www.eurocarparts.com/electrical
* Mister Auto: https://www.mister-auto.co.uk/electrical-system/
* Oscaro: https://www.oscaro.com/electrical-system
* Autoteilemann: https://www.autoteilemann.de/autoteile/elektrik-beleuchtung.html
Asia
* Alibaba: https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=automotive+electrical+parts
* 1688.com: https://www.1688.com/
* Taobao: https://s.taobao.com/search?q=%E8%81%94%E6%8E%A7%E7%94%B5%E6%99%BA&imgfile=&js=1&stats_click=search_radio_all%3A1& iniciativa_id =staobaoz_20230126&spm=a21bo.21814611.2018062.1&sourceId=staobaoz_20230126
* JD.com: https://www.jd.com/category/16063
* Tmall: https://www.tmall.com/category-16063-18717.htm
Additionally, you may want to consider the following resources:
* Wholesale Automotive Parts Association (AAIA): https://www.aaiw.org/
*National Automotive Parts Association (NAPA): https://www.napaonline.com/
* Catalog of wholesale spare parts for cars: https://www.wholesale-automotive-parts-catalog.com/