I've got a canadian spec 1990 325i and am in the middle of doing yet another headlight upgrade. I'd like to look into deleting the DRL's to try and save on expensive bulbs as running them for 2-3 hours a day or more quickly and needlessly kills shortens the lifespan. I've come across a couple different methods and I'm trying to figure out which is the preferred.
1: Relay mods, all kinds of hacky shit under the dash involving reversing relay actions etc.
2: Connecting the gr/yl from the headlight switch to the ground pin on the relay lowbeam relay
My goal is to have the option to run only park lights during the day, and turn on the actual lows when the sun goes down. My issue with option one is it is hacky as hell, and my issue with option two is I can't seem to find a comprehensive diagram in the ETM that outlines the changes and explains why with DRL's headlights are on in position 0 and position 2, but off in position 1. This is not a one time thing as all three of my e30's have worked this way. If there are no clean solutions I will likely just leave it as is, but I would much rather it function exactly like a stock american model.
1: Relay mods, all kinds of hacky shit under the dash involving reversing relay actions etc.
2: Connecting the gr/yl from the headlight switch to the ground pin on the relay lowbeam relay
My goal is to have the option to run only park lights during the day, and turn on the actual lows when the sun goes down. My issue with option one is it is hacky as hell, and my issue with option two is I can't seem to find a comprehensive diagram in the ETM that outlines the changes and explains why with DRL's headlights are on in position 0 and position 2, but off in position 1. This is not a one time thing as all three of my e30's have worked this way. If there are no clean solutions I will likely just leave it as is, but I would much rather it function exactly like a stock american model.
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