Q: Q: Ignition fuse keeps blowing

asked by on

My ignition fuse keeps blowing, plus my heater blower only works on high. Are these problems connected? Or are they separate? I found out why the heater is acting up. But the fuse.

My car has 300000 miles.
My car has an automatic transmission.

The ignition circuit fuse blowing and the problem with the blower motor are almost undoubtedly not related. In particular, if the blower motor works, on any speed, while at the same time the ignition circuit fuse is blown or otherwise "missing", that tells you for sure that these two "loads" are not on the same "circuit". The fuse for the ignition circuit will typically blow repeatedly if there is a dead short in the circuit (a hot wire with lost insulation touching ground) or a device in the circuit, such as the ignition switch, is malfunctioning and also drawing more current than the fuse can handle. The best way to resolve the issue with the fuse is to request an electrical component diagnostic. The responding certified mechanic will identify and repair the fault in the circuit and replace the fuse and test for normal operation.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Ignition fuse keeps blowing

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Makes brake fluid is black

Brake fluid accumulates moisture and contaminants over time and consequently the fluid should be replaced about every 35,000 to 50,000 miles. To service the fluid you can request a brake system flush and refill. If you request that service, the...

Q: Q: Steering wheel is locked up and key won't turn.

Hi there. Try turning the steering wheel back and forth while trying to turn the key in the ignition. There is a steering wheel lock inside the steering column that could be bent or broken if the ignition switch will...

Q: AC blower working intermittently

The main cause of intermittent blower motor failure for your AC is the blower motor itself. I would suggest having a technician, from YourMechanic, come out and replace the blower motor and test resistance on the winding and replace it...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...