Not really looking for help, just looking to document for self, possibly help others.
Resources:
This video is SUPER helpful with troubleshooting parasitic draw if you are not really sure where to start:
Who makes the best battery?:
Car and deep cycle battery FAQ (old, but good general info): Car and Deep Cycle Battery FAQ, Battery Manufacturers and Brand Names List, and Battery References and Information Links List
Toyota Factory Service Manuals: https://techinfo.toyota.com
Car: 2003 Matrix
Symptoms: Battery went dead overnight. Had to jump-start in the morning.
Troubleshooting:
-Turned off everything on car, closed all doors. Using DMM (see video, link above), determined that there was 163mv of drop (should be no more than 50mv). Pulled and replaced underhood fuses until I found the one that stopped the voltage drop. This turned out to be the "DOM LIT" circuit. This also runs door unlock/lock via remote fob, radio, "you left your lights on" warning tone, rearview mirror lights, who knows what else.
Misc.:
Battery was too abused from deep cycling to hold a charge and I replaced it with an Everstart Maxx group size 35 from Walmart. Draw is stopped but the key fob, radio, and dome light still aren't working and I've got to troubleshoot into this circuit further. I assume I'll have to hit up the FSM for wiring diagrams and start crawling around with the DMM. Ugh.
Resources:
This video is SUPER helpful with troubleshooting parasitic draw if you are not really sure where to start:
Who makes the best battery?:
Car and deep cycle battery FAQ (old, but good general info): Car and Deep Cycle Battery FAQ, Battery Manufacturers and Brand Names List, and Battery References and Information Links List
Toyota Factory Service Manuals: https://techinfo.toyota.com
Car: 2003 Matrix
Symptoms: Battery went dead overnight. Had to jump-start in the morning.
Troubleshooting:
-Turned off everything on car, closed all doors. Using DMM (see video, link above), determined that there was 163mv of drop (should be no more than 50mv). Pulled and replaced underhood fuses until I found the one that stopped the voltage drop. This turned out to be the "DOM LIT" circuit. This also runs door unlock/lock via remote fob, radio, "you left your lights on" warning tone, rearview mirror lights, who knows what else.
Misc.:
Battery was too abused from deep cycling to hold a charge and I replaced it with an Everstart Maxx group size 35 from Walmart. Draw is stopped but the key fob, radio, and dome light still aren't working and I've got to troubleshoot into this circuit further. I assume I'll have to hit up the FSM for wiring diagrams and start crawling around with the DMM. Ugh.
