Today i was finally able to get up out of bed, i've haven't had a cold since the pandemic started. I had to get tested for covid, thankfully i'm negative but spending few days indoors and eating all the time, i've become fatter than ever. So this morning with a small fever i got down in the small heated garage to get some work done. First to be repaired is my brothers Astra, It has a major oil leak on top of the engine around the injectors. So 4 new gaskets and i apply silicone sealant as an insurance. Then the annoying issue, it has a good battery and it keeps dying, there is no parasitizing draw but whenever you turn the ignition on headlights come on and stay on even when cranking. Being a diesel it need lots of power but the battery tray is very small so this is the biggest battery it can accommodate. Lot of people rewrite their headlight to the ignition ( lazy people). So i took apart all the wiring to fine where has someone cut the wires. I looked and looked but no spaces, when i put everything back together got my diagnostic out and seen it's the ecu that commands the lights on with the ignition on. I also tried finding the fuse or relay and guess what there is no fuse or relay it all goes thru the BCM. As stupid as it sounds it's a daylight running lights strategy, i tried to change it but it needs a Car Pass code which i don't have. And this being a GM product there is only one dealership, their service is awful and they simply don't pickup the phone. So this issue remains, one of the issues why i don't like GM vehicles is they always have something wrong with them. And there is no dealership support, If this was a Peugeot, Citroen i'll be done, one phone call or an e-mail dealers have access to the code thru the vehicles vin.
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