Quote:
Originally Posted by jicko
For 2014+, DRL is probably the one close to impossible to do since it is voltage regulation from either the ECU or the super pricy solid-state relay. It regulate the voltage to the high-beam/DRL 9005 bulb between 6V and 12V (I havent verified this claim personally yet).
BTW, I am looking for some multi-states switches for our trucks. I want ones that fit into the stock push buttons slots, but have functions like our dome light...... off-state1(door) -state2 (on).
|
High current, solid state automotive relays are about $10 retail. Although Toyota does charge $250 for an empty 16GB SD card, so I'd imagine the dealer would charge $150 for their rebadge relay. Also, voltage regulation does not occur in a relay.
An ECU is an Engine Control Unit. Used to control valves, injection, air fuel ratios, etc. It won't have anything to do with your lighting. Although I guess ECU can stand for Electronic control unit, which is just a simple microcontroller and houses many relays, logic circuits in a modular plug-and-play unit. Unless you have the interface guide to program this, DIY'ers won't be utilizing this much unless they roll their own.
As an engineer this thread scares me. I bought this wiring harness off ebay and just plugged it in... *shudders*