Electrical issue with my 2005 silverado ls 4.8

Asked by Chirp1031 Jun 27, 2018 at 11:29 AM about the 2005 Chevrolet Silverado 1500 LS Extended Cab RWD

Question type: Maintenance & Repair

I going crazy throwing parts at this thing i hope
someone can teally help me . So it started with my
brake lights not working and so when i checked my
bulbs everything was good but i changed them
anyway.is when i noticed that when i press the
brake my fuel pump primes with no key in ignition
also my throttle body make a soud at the same
time. So i kept looking around and the only way i
can get the pump to stop priming is if i disconnect
the brake switch. And also when i hit the brake
along withe the fuel pump priming and throttle
body making noise the check engine light comes
on all with no key in ignition please someone help
me.

3 Answers
4,955

MGM_Mobile_Electroni... answered 5 years ago

Start by checking the ground wire. There's a wire on the passengers side rear of the engine block that tends to go bad and create some kind of crazy issues. Copy and paste the following youtube link to get a better idea of what i'm talking about. https://www.youtube.com/watch?v=lETfny-Xy4c

2 people found this helpful.
Mark helpful

Chirp1031 answered 5 years ago

Thanks so much but for some reason when i pulled out the air bag fuse it stop doing it . I know it makes no sense at all but it all went back to normal.

Mark helpful
4,955

MGM_Mobile_Electroni... answered 5 years ago

I'm glad you've solved your issue. I will say that removing an airbag fuse could be a bad idea (Lack of airbags). Obviously, you likely know that already. I would still recommend checking the ground wire. Removing one item from the circuit could improve the ground being shared by your other devices (over time, a failing ground could leave you stranded or worse) Just keep in mind the possibility and if any other issues arise, give it a look-see.

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