3 weeks ago, my son was stopped by the cops with Tail lights not working. He went to Autozone & purchased all the bulbs he needed. The lights still did not come on. He brought the vehicle home & I found the fuse was fried. I did some research & found out that aftermarket bulbs supposedly have a higher wattage than the OEM bulbs. I purchased the correct OEM bulbs & installed all new bulbs & replaced the fuse. I checked the tail gate harness for loose or fried wires & did not find any. Earlier that week I purchased a light failure sensor module from the junkyard but did not install it because the lights worked after installing a new fuse & new bulbs. Lights came on for 10 mins. I drove the truck to deliver it to him and we checked the lights before he took the truck & the lights would not come on & the fuse was fried. Last night I tested the brakes & all the tail/brakes lights came on since they have a dual function. All the new bulbs work. Fuse now blows @ start & w the light switch
What makes this problem better or worse?
Tail light fuse blows during start & when turning on the head lights no dash warning
How long has your 2003 Lexus RX300 had this problem?
RepairPal Certified shops can diagnose and repair your 2003 Lexus RX300. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Keep in mind the “tail-light†circuit also applies to the front parking lights as well as the rear tag lights so testing should expand to those areas also.
Forgot to mention the side marker lights .. This fuse box diagram should help: https://www.autogenius.info/lexus-rx-300-1999-2003-fuse-box-diagram/
‘IF’ vehicle is wired for towing - that needs to be closely inspected too.