Skip the auto shop - Our mechanics make house calls

Q: Moisture in fuse box causes fuel pump fuse malfunction

asked by on

I have been told that moisture gets inside the fuse box causing the fuel pump fuse to malfunction and this is the reason that my car will not start on humid days or on rainy days. To me that all sounds strange. He also told me that the fuses must specifically be Volvo fuses and the right voltage of course. Secondly, the distributor cap had a bad gasket which was also causing moisture with the contacts, and is thus preventing sparks. Is there a way to seal up the fuse box to prevent future moisture from getting inside it?

For this, Silicone spray is one tool I personally like to use especially on rubber or silicone seals. The spray will leave a water-tight film on the electrical component and offers a moisture resistant coating. If you would like to have this checked, an expert, like one from YourMechanic can come to your car’s location to inspect the electrical system in order to scope the problem out and pinpoint any problems.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: I have a Subaru Impreza 2009 and the two charger ports do not work as aux and there is no aux cable input even though the radio aux.

Check the fuses with the auxiliary charging ports to see if they have burned. If the fuse is good, then there is an open or short within the wiring to the charging ports. The radio has an auxiliary wire attached...

Q: sub woofer popping in-out

Your issue sounds to me like a loose connection. I would recommend having your power, ground, and RCA wires checked to make sure they are connected properly and that no loose connectors exist. If the subwoofer itself were faulty it...

Q: Overheating and boiling out the reservoir.

Hey there. The next thing you need to do is confirm the thermostat is opening and test to see if the radiator is clogged or not. Begin by warming your car up. Don't drive it, just let it idle or...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.