Why do multiple electrical accessories fail when starting the car?
Multiple electrical accessories and systems fail simultaneously upon startup because a single component, such as a faulty ignition switch, a failing main relay, or a major grounding issue, is interrupting power to several circuits at once. This prevents essential features like power steering, air conditioning, and auxiliary devices from operating normally when the engine turns on.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Checking individual fuses for continuityDid this help you?
- 2Probing fuse terminals with the car off and ignition onDid this help you?
- 3Installing a new alternatorDid this help you?
- 4Unplugging and re-plugging the device accessory to force power detection.Did this help you?
- 5checking for blown fuses with a test lightDid this help you?
- 6getting a dealer resetDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“all of those went out upon start up.”source ↗
Where this came up
People with this problem also raised
- 2Dishwasher lights blinking and won't start
- 2Why does my dryer heating element connector keep burning out?
- 3Power strip sparked and tripped the breaker
- 21Why does running multiple appliances trip the circuit breaker?
- 6Why does my electrical outlet only work sometimes?
- 4Why does touching my breaker panel turn my electric dryer back on?