/diy/ - Do It Yourself

Sorry, accidentally posted in the old thread. Hi, hoping to get some ideas on how to achieve the following: I have a car accessory that normally runs illuminated at 12V. When I flip the headlight switch, the dim circuit lowers voltage to about 10.1V. However this voltage drop doesn't seem to be sufficient to trigger the accessory's dim function.
Is there any simple way to have the signal be 12V normally, and drop further once the switch is activated? I tried putting a diode inline, but that only dropped the overall brightness- I want to keep max bright voltage the same, and drop the dim voltage further.
Any help/advice would be appreciated. Thanks! pic related

Hi, hoping to get some ideas on how to achieve the following: I have a car accessory that normally runs illuminated at 12V. When I flip the headlight switch, the dim circuit lowers voltage to about 10.1V. However this voltage drop doesn't seem to be sufficient to trigger the accessory's dim function.
Is there any simple way to have the signal be 12V normally, and drop further once the switch is activated? I tried putting a diode inline, but that only dropped the overall brightness- I want to keep max bright voltage the same, and drop the dim voltage further.
Any help/advice would be appreciated. Thanks! pic related